Journal articles: 'Novel Nanoporous Organic Materials'

1

Shimojima, Atsushi, and Kazuyuki Kuroda. "Alkoxy- and Silanol-Functionalized Cage-Type Oligosiloxanes as Molecular Building Blocks to Construct Nanoporous Materials." Molecules 25, no. 3 (January 25, 2020): 524. http://dx.doi.org/10.3390/molecules25030524.

Full text

Abstract:

Siloxane-based materials have a wide range of applications. Cage-type oligosiloxanes have attracted significant attention as molecular building blocks to construct novel siloxane-based nanoporous materials with promising applications such as in catalysis and adsorption. This paper reviews recent progress in the preparation of siloxane-based nanoporous materials using alkoxy- and silanol-functionalized cage siloxanes. The arrangement of cage siloxanes units is controlled by various methods, including amphiphilic self-assembly, hydrogen bonding of silanol groups, and regioselective functionalization, toward the preparation of ordered nanoporous siloxane-based materials.

APA, Harvard, Vancouver, ISO, and other styles

2

Sarkisov, Lev, Tina Düren, and Randall Q. Snurr. "Molecular modelling of adsorption in novel nanoporous metal–organic materials." Molecular Physics 102, no. 2 (January 20, 2004): 211–21. http://dx.doi.org/10.1080/00268970310001654854.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Sarkisov, Lev, Tina Düren, and Randall Q. Snurr. "Molecular modelling of adsorption in novel nanoporous metal-organic materials." Molecular Physics -1, no. 1 (January 1, 2003): 1. http://dx.doi.org/10.1080/00268970410001654854.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Xiao, Heting, Hebin Jiang, Haixia Yin, and Yueting Sun. "Nanofluidic Attenuation of Metal-Organic Frameworks." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 265, no. 1 (February 1, 2023): 6314–21. http://dx.doi.org/10.3397/in_2022_0938.

Full text

Abstract:

Porous materials with energy absorption characteristics have been used for attenuation against hazardous vibrations and noises. The intrusion of liquid water and aqueous solutions into hydrophobic nanoporous materials such as metal-organic frameworks (MOFs) present an attractive pathway to engineering new attenuation technologies. In this process, hydrostatic pressure forces water to intrude hydrophobic nanopores, thereby converting mechanical work into interfacial energy through nanoscale interfacial interactions. Once the external pressure is removed, water molecules can flow out of the nanopores spontaneously, making the system reversible. We envision that this mechanism has the potential of innovating attenuation technologies, so in this work we provided a preliminary study in this direction. We investigated a material system consisting of water and a commonly used MOF, zeolitic imidazolate framework-8 (ZIF-8), and demonstrated its reversibility and stability under cyclic pressurization, considered its performance at various peak pressures and frequencies, its tunability in terms of intrusion pressure, and its potential in hydrogel forms. These features are important for potential attenuation technologies based on this novel mechanism.

APA, Harvard, Vancouver, ISO, and other styles

5

Zhang, Lu, Yuan Liu, Han Song, Bintong Huang, Bang-Ce Ye, and Yingchun Li. "Nanoporous gold leaf as a signal amplification agent for the detection of VOCs with a quartz crystal microbalance." Analyst 141, no. 15 (2016): 4625–31. http://dx.doi.org/10.1039/c6an00556j.

Full text

Abstract:

In this work, a novel sensing framework coupling nanoporous gold leaf (NPGL) and sensitive materials on a quartz crystal microbalance (QCM) sensor was developed for detection of volatile organic compounds (VOCs).

APA, Harvard, Vancouver, ISO, and other styles

6

Wijaya, Karna, Eddy Heraldy, Lukman Hakim, Ahmad Suseno, Poedji Loekitowati Hariani, Maisari Utami, and Wahyu Dita Saputri. "Synthesis and Application of Nanolayered and Nanoporous Materials." ICS Physical Chemistry 1, no. 1 (February 6, 2021): 1. http://dx.doi.org/10.34311/icspc.2021.1.1.1.

Full text

Abstract:

Nanoscale materials are currently an attractive research subject because their properties are in contrast to their macroscopic counterparts. An inert material, such as bulk platinum metal for example, is known to exhibit a catalytic properties when its size is reduced into nanoscale. A stable material can become flammable or combustible, such as aluminum, and isolator material can become a conductor. Many attractive quantum phenomena also arise from reducing a material size into nanoscale dimensions. This review article discusses the concept, synthesis, and characterization of organic and inorganic nanolayered and nanoporous materials; and their application to catalysis and adsorption processes. Past achievements and future perspectives in the field of nanomaterial researches will be discussed as well. Furthermore, in the era of green chemistry, nanomaterials with all their derivatives are also required to have sustainable characteristics, such as biodegradable and renewable; which emphasizes that the development of nanomaterials in the framework of green chemistry should always be a priority. Through the synthesis of novel and functional nanomaterials using natural and local-based materials around us that are environmentally friendly and relatively easy to be obtained, our goal toward the inheritance of a greener world for the future generations is not an impossible dream.

APA, Harvard, Vancouver, ISO, and other styles

7

Isaeva, Vera I., Oleg M. Nefedov, and Leonid M. Kustov. "Metal–Organic Frameworks-Based Catalysts for Biomass Processing." Catalysts 8, no. 9 (August 31, 2018): 368. http://dx.doi.org/10.3390/catal8090368.

Full text

Abstract:

: Currently, metal–organic frame works (MOFs) as novel hybrid nanoporous materials are a top research interest, including endeavors in heterogeneous catalysis. MOF materials are promising heterogeneous catalytic systems due to their unique characteristics, such as a highly ordered structure, a record high surface area and a compositional diversity, which can be precisely tailored. Very recently, these metal-organic matrices have been proven as promising catalysts for biomass conversion into value-added products. The relevant publications show that the structure of MOFs can contribute essentially to the advanced catalytic performance in processes of biomass refining. This review aims at the consideration of the different ways for the rational design of MOF catalysts for biomass processing. The particular characteristics and peculiarities of the behavior of different MOF based catalytic systems including hybrid nanomaterials and composites will be also discussed by illustrating their outstanding performance with appropriate examples relevant to biomass catalytic processing.

APA, Harvard, Vancouver, ISO, and other styles

8

Vasin, Andrii, Dmytro Kysil, Andriy Rusavsky, Oksana Isaieva, Alexander Zaderko, Alexei Nazarov, and Volodymyr Lysenko. "Synthesis and Luminescent Properties of Carbon Nanodots Dispersed in Nanostructured Silicas." Nanomaterials 11, no. 12 (December 1, 2021): 3267. http://dx.doi.org/10.3390/nano11123267.

Full text

Abstract:

Luminescent carbon nanoparticles are a relatively new class of luminescent materials that have attracted the increasing interest of chemists, physicists, biologists and engineers. The present review has a particular focus on the synthesis and luminescent properties of carbon nanoparticles dispersed inside nanostructured silica of different natures: oxidized porous silicon, amorphous thin films, nanopowders, and nanoporous sol–gel-derived ceramics. The correlations of processing conditions with emission/excitation spectral properties, relaxation kinetics, and photoluminescence photodegradation behaviors are analyzed. Following the evolution of the photoluminescence (PL) through the “from-bottom-to-up” synthesis procedure, the transformation of molecular-like ultraviolet emission of organic precursor into visible emission of carbon nanoparticles is demonstrated. At the end of the review, a novel method for the synthesis of luminescent and transparent composites, in form of nanoporous silica filled with luminescent carbon nanodots, is presented. A prototype of white light emitting devices, constructed on the basis of such luminophores and violet light emitting diodes, is demonstrated.

APA, Harvard, Vancouver, ISO, and other styles

9

J, Ganesan, Jeyadevi S, Siva Kaylasa Sundari S, Arunjunai Raj M, Pitchaimari G, and Vijayakumar CT. "Thermal, mechanical, and electrical properties of difunctional and trifunctional epoxy blends with nanoporous materials." Journal of Elastomers & Plastics 54, no. 3 (December 10, 2021): 494–508. http://dx.doi.org/10.1177/00952443211060400.

Full text

Abstract:

In the present study, the aim is to synthesize the particulate nanocomposites with difunctional and trifunctional epoxy blend as matrix and synthesized nanoporous materials as fillers. Organic/inorganic hybrid networks were prepared by the novel solvent free method. Viscoelastic, thermal, and electrical properties of di- and trifunctional epoxy and the effect of different nanoparticles in the particulate nanocomposites have been studied by dynamic mechanical analyzer, thermogravimetry (TGA), and dielectric strength. Epoxy mixed with different compositions of TGPAP and particulate nanocomposites by the addition of different types of nanomaterials shows higher storage modulus than the pure epoxy. The addition of TGPAP and nanofillers decreases the thermal stability of epoxy matrix. The evolved gas analysis (TG-FTIR) was also done in order to study the products formed during degradation. An increase in dielectric strength and impact strength (4%) was also observed in the particulate nanocomposites.

APA, Harvard, Vancouver, ISO, and other styles

10

Liu, Chunqing, Nathaniel Naismith, Lei Fu, and James Economy. "Novel nanoporous hybrid organic–inorganic silica containing iminodiethanol chelating groups inside the channel pores." Chem. Commun., no. 15 (2003): 1920–21. http://dx.doi.org/10.1039/b304057g.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Rezanejade Bardajee, Ghasem, Ali Pourjavadi, and Rouhollah Soleyman. "Novel highly swelling nanoporous hydrogel based on polysaccharide/protein hybrid backbone." Journal of Polymer Research 18, no. 3 (March 25, 2010): 337–46. http://dx.doi.org/10.1007/s10965-010-9423-3.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

Cao, Xinwang, Xianfeng Wang, Bin Ding, Jianyong Yu, and Gang Sun. "Novel spider-web-like nanoporous networks based on jute cellulose nanowhiskers." Carbohydrate Polymers 92, no. 2 (February 2013): 2041–47. http://dx.doi.org/10.1016/j.carbpol.2012.11.085.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

Cox, Jordan M., Ian M. Walton, Cassidy A. Benson, Yu-Sheng Chen, and Jason B. Benedict. "A versatile environmental control cell forin situguest exchange single-crystal diffraction." Journal of Applied Crystallography 48, no. 2 (March 24, 2015): 578–81. http://dx.doi.org/10.1107/s160057671500432x.

Full text

Abstract:

In situsingle-crystal diffraction experiments provide researchers with the opportunity to study the response of crystalline systems, including metal–organic frameworks and other nanoporous materials, to changing local microenvironments. This paper reports a new environmental control cell that is remarkably easy to use, completely reusable, and capable of delivering static or dynamic vacuum, liquids or gases to a single-crystal sample. Furthermore the device is nearly identical in size to standard single-crystal mounts so a full unrestricted range of motion is expected for most commercial goniometers.In situsingle-crystal X-ray diffraction experiments performed under dynamic gas-flow conditions revealed the cell was capable of stabilizing a novel metastable intermediate in the dehydration reaction of a previously reported metal–organic framework.

APA, Harvard, Vancouver, ISO, and other styles

14

Ro, Hyun Wook, Kook Ji Kim, Patrick Theato, David W. Gidley, and Do Y. Yoon. "Novel Inorganic−Organic Hybrid Block Copolymers as Pore Generators for Nanoporous Ultralow-Dielectric-Constant Films." Macromolecules 38, no. 3 (February 2005): 1031–34. http://dx.doi.org/10.1021/ma048353w.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

Klajn, Rafal. "Immobilized azobenzenes for the construction of photoresponsive materials." Pure and Applied Chemistry 82, no. 12 (October 15, 2010): 2247–79. http://dx.doi.org/10.1351/pac-con-10-09-04.

Full text

Abstract:

The immobilization of molecular switches onto inorganic supports has recently become a hot topic as it can give rise to novel hybrid materials in which the properties of the two components are mutually enhanced. Even more attractive is the concept of “transferring” the switchable characteristics of single layers of organic molecules onto the underlying inorganic components, rendering them responsive to external stimuli as well. Of the various molecular switches studied, azobenzene (AB) has arguably attracted most attention due to its simple molecular structure, and because its “trigger” (light) is a noninvasive one, it can be delivered instantaneously, and into a precise location. In order to fully realize its potential, however, it is necessary to immobilize AB onto solid supports. It is the goal of this manuscript to comprehensively yet concisely review such hybrid systems which comprise AB forming well-defined self-assembled monolayers (SAMs) on planar and curved (colloidal and nanoporous) inorganic surfaces. I discuss methods to immobilize AB derivatives onto surfaces, strategies to ensure efficient AB isomerization, ways to monitor the switching process, properties of these switchable hybrid materials, and, last but not least, their emerging applications.

APA, Harvard, Vancouver, ISO, and other styles

16

Yim, Jin-Heong, Jongseob Kim, David W. Gidley, Richard S. Vallery, Hua-Gen Peng, Duk Keun An, Byoung-Ki Choi, Young-Kwon Park, and Jong-Ki Jeon. "Calixarene Derivatives as Novel Nanopore Generators for Templates of Nanoporous Thin Films." Macromolecular Materials and Engineering 291, no. 4 (April 7, 2006): 369–76. http://dx.doi.org/10.1002/mame.200500370.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Quach, Qui, Ngan Quach, Kade Adamy, and Tarek M. Abdel-Fattah. "Surface Modification of Magnetic Nanoporous Silica with Carbon Based Materials for Enhancing Organic Dye Removal." ECS Meeting Abstracts MA2022-02, no. 8 (October 9, 2022): 671. http://dx.doi.org/10.1149/ma2022-028671mtgabs.

Full text

Abstract:

The issue of wastewater from the dyeing industry entering the environment has significantly impacted both humans and other species. The dye blocks the photosynthesis process of aquatic plants and causes oxygen depletion in the marine environment. The dye is difficult to remove from wastewater due to their aromatic chemical structure. When the dye enters to human body, it can cause cancer, cell damage, and life-threatening conditions. Different methods have been investigated to remove the dye such as precipitation, photocatalytic, ion exchange, and membrane filtration. Those methods were difficult to apply on wide scale due to either their high cost or low efficiency. Adsorption is still an economical and effective method due to the cheap production cost and the reusability of the materials. Nanomaterials have great promises in improving many issues related to energy, catalysis, biomaterials, sensing applications and designing novel adsorbent materials [1-31]. Nanosize adsorbent materials have been utilized and great affinity for removing inorganic and organic species. In this study, we develop a new method of modifying and activating the magnetic zeolite Y, as a nanoporous adsorbent by utilizing cetyltrimethyl ammonium bromide (CTAB). We applied mechanochemical synthesis method to combine CTAB with magnetic zeolite Y. The composite was applied to adsorb methylene blue. The adsorbing efficiency was monitored by UV-Vis spectrophotometer. The study showed that at 500 mg/L, the composite adsorbed 12% of methylene blue. At 1000 mg/L and 5000 mg/L, the composite adsorbed 71% and 100% of methylene blue, respectively. References ME Mahmoud, MA Khalifa, YM El Wakeel, MS Header, TM Abdel-Fattah, Journal of Nuclear Materials 487, 13-22 (2017) C Huff, T Dushatinski, TM Abdel-Fattah, International Journal of Hydrogen Energy 42 (30), 18985-18990 (2017) M Stacey, C Osgood, BS Kalluri, W Cao, H Elsayed-Ali, T Abdel-Fattah, Biomedical Materials 6 (1), 011002 (2011) SE Mohmed Labeb, Abdel-Hamed Sakr, Moataz Soliman, Tarek M.Abdel-Fattah, Optical Materials 79, 331-335 (2018) ME Mahmoud, MM Osman, SB Ahmed, TM Abdel-Fattah, Chemical engineering journal 175, 84-94 (2011) TM Abdel-Fattah, ME Mahmoud, Chemical engineering journal 172 (1), 177-183 (2011) R Bhure, TM Abdel-Fattah, C Bonner, JC Hall, A Mahapatro, Journal of biomedical nanotechnology 6 (2), 117-128 (2010) TM Abdel-Fattah, D Loftis, A Mahapatro, Journal of biomedical nanotechnology 7 (6), 794-800 (2011) OH Elsayed-Ali, T Abdel-Fattah, HE Elsayed-Ali, Journal of hazardous materials 185 (2-3), 1550-1557 (2011) R Bhure, A Mahapatro, C Bonner, TM Abdel-Fattah, Materials Science and Engineering: C 33 (4), 2050-2058 (2013) BE Bishop, BA Savitzky, T Abdel-Fattah, Ecotoxicology and Environmental Safety 73 (4), 565-571 (2010) C Huff, JM Long, A Heyman, TM Abdel-Fattah, ACS Applied Energy Materials 1 (9), 4635-4640 (2018) TM Abdel-Fattah, EM Younes, G Namkoong, EM El-Maghraby, Synthetic Metals 209, 348-354 (2015) S Ebrahim, M Soliman, TM Abdel-Fattah, Journal of electronic materials 40 (9), 2033-2041 (2011) SH Lapidus, A Naik, A Wixtrom, NE Massa, V Ta Phuoc, L del Campo, Crystal growth & design 14 (1), 91-100 (2014) A Mahapatro, TD Matos Negrón, C Bonner, TM Abdel-Fattah, Journal of Biomaterials and Tissue Engineering 3 (2), 196-204 (2013) S Ebrahim, M Labeb, T Abdel-Fattah, M Soliman, Journal of Luminescence 182, 154-159 (2017) T Dushatinski, C Huff, TM Abdel-Fattah, Applied Surface Science 385, 282-288 (2016) ME Mahmoud, SS Haggag, MA Rafea, TM Abdel-Fattah, Polyhedron 28 (16), 3407-3414 (2009) C Huff, JM Long, A Aboulatta, A Heyman, TM Abdel-Fattah, ECS Journal of Solid State Science and Technology 6 (10), M115 (2017) A Wixtrom, J Buhler, T Abdel-Fattah, Journal of Chemical Education 91 (8), 1232-1235 (2014) ME Mahmoud, SS Haggag, TM Abdel-Fattah, Polyhedron 26 (14), 3956-3962 (2007) TM Abdel-Fattah, ME Mahmoud, MM Osmam, SB Ahmed, Journal of Environmental Science and health, part A 49 (9), 1064-1076 (2014) ME Mahmoud, TM Abdel-Fattah, MM Osman, SB Ahmed, Journal of Environmental Science and Health, Part A 47 (1), 130-141 (2012) C Huff, E Biehler, Q Quach, JM Long, TM Abdel-Fattah, Colloids and Surfaces A: Physicochemical and Engineering Aspects 610 (5), 125734 (2021) K Foe, G Namkoong, TM Abdel-Fattah, H Baumgart, MS Jeong, DS Lee, Thin solid films 534, 76-82 (2013) M Abdel-Fattah, A Wixtrom, K Zhang, W Cao, H Baumgart, ECS Journal of Solid State Science and Technology 3 (10), M61 (2014) C Huff, T Dushatinski, A Barzanji, N Abdel-Fattah, K Barzanji, ECS Journal of Solid State Science and Technology 6 (5), M69 (2017) TM Abdel-Fattah, B Bishop, Journal of Environmental Science and Health, Part A 39 (11-12), 2855-2866 (2014) Quach, E. Biehler, A. Elzamzami, C. Huff, J.M. Long, T.M. Abdel Fattah, Catalysts, 11, 118 (2021). E. Biehler, Q. Quach, C. Huff, T. M. Abdel-Fattah, Materials, 15, 2692 (2022).

APA, Harvard, Vancouver, ISO, and other styles

18

Zhou, Yingjie, Qibin Li, and Qiang Wang. "Energy Storage Analysis of UIO-66 and Water Mixed Nanofluids: An Experimental and Theoretical Study." Energies 12, no. 13 (June 30, 2019): 2521. http://dx.doi.org/10.3390/en12132521.

Full text

Abstract:

The thermal energy storage properties of a working fluid can be modified by the exothermic and endothermic adsorption and desorption of fluid molecules in the micro/nanoporous materials. In this study, thermogravimetric (TG) analysis experiments and molecular simulations (molecular dynamics, MD, and grand canonical Monte Carlo, GCMC) were employed to examine the thermal energy storage properties of the UIO-66 metal organic framework material, UIO-66/H2O nanofluids and pure water. Our results showed that the molecular simulation calculations were, in principle, consistent with the obtained experimental data. The thermal energy storage performance of UIO-66/H2O nanofluids was enhanced with the increase in the UIO-66 mass fraction. In addition, the differences between the simulation calculations and experimental results could be mainly ascribed to the different structures of UIO-66 and the evaporation of fluid samples. Furthermore, this work indicated that molecular simulations contributed to developing novel working pairs of metal organic heat carriers (MOHCs).

APA, Harvard, Vancouver, ISO, and other styles

19

Veselovsky, Vladimir V., Antonina V. Lozanova, Vera I. Isaeva, Anna A. Lobova, Andrew N. Fitch, and Vladimir V. Chernyshev. "Optically active derivatives of terephthalic acid: four crystal structures from two powder patterns." Acta Crystallographica Section C Structural Chemistry 74, no. 3 (February 5, 2018): 248–55. http://dx.doi.org/10.1107/s2053229618001705.

Full text

Abstract:

A novel important class of nanoporous crystalline solids, metal–organic frameworks (MOFs), composed of organic ligands (linkers) and metal ions, is now considered as a platform for the development of various functional hybrid materials. In order to design new MOF-based asymmetric catalysts, two terephthalic acid derivatives, namely 2-{[1-(1-tert-butoxycarbonyl)-L-prolyl]amino}terephthalic acid, C18H22N2O7, (1), and 2-(L-prolylamino)terephthalic acid, C13H14N2O5, (2), which could find potential applications as chiral linkers for the construction of enantioselective MOFs, were synthesized and their powder samples were measured at synchrotron station ID22 (ESRF). Each sample contained two unknown crystalline phases, so four new crystal structures were determined, namely, the 2.24-hydrate of (1), (1a) (space groupC2221), and the 2.08-hydrate of (1), (1b) (P2221), which are crystallohydrates, and two polymorphs of (2),i.e.(2a) (C2221) and (2b) (P212121), and were validated with DFT-d (dispersion-corrected density functional theory) optimizations.

APA, Harvard, Vancouver, ISO, and other styles

20

Hajizadeh, Alireza, Ahmad Reza Bahramian, and Alireza Sharif. "Effect of Rubber Modification on the Morphology and Properties of Novolac Nanostructures." Advanced Materials Research 829 (November 2013): 41–45. http://dx.doi.org/10.4028/www.scientific.net/amr.829.41.

Full text

Abstract:

Nanostructured organic materials have received considerable attention over the past decade. This nanostructure is responsible for their unusual acoustic, thermal, and mechanical properties. One of the most studying of this field is sol-gel polymerization of resorcinol-formaldehyde, followed by organic solvent exchange, supercritical drying. However, the conventional process involves long gelation time, expensive monomer of resorcinol, high cost of supercritical drying device and so on, which makes it some distance away from being promoted to commercial production. In this work, to reduce cost and time, the reaction of novolac resin and hexamine and ambient pressure drying method was used for preparation and drying of organic gel. To reduce time, the polymerization in saturated atmosphere of solvent vapor instead of conventional sol-gel polymerization presented. These nanostructure materials have a nanoporous structure that constructed by colloidal like particles gathered up in filament-shaped. Because of this nanoporosity and structure, these materials have very low fracture energy and could including them as brittle materials. The goal of this research produces these nanostructure materials using novel method and enhances fractural resistance. To gain this proposes, the feasibility of using acrylonitrilebutadiene rubbers (NBR) has been investigated. For studying of morphology and properties of this structure, we used SEM, FTIR and porosimetry analysis. The results shows that the addition of 0.5, 1 and 2 wt% NBR to Novolac nanostructure increased density and decrease the pore volume and pore size.

APA, Harvard, Vancouver, ISO, and other styles

21

Chakraborty, Debabrata, Tapabrata Dam, Arindam Modak, Kamal K. Pant, Bijan Krishna Chandra, Adinath Majee, Aswini Ghosh, and Asim Bhaumik. "A novel crystalline nanoporous iron phosphonate based metal–organic framework as an efficient anode material for lithium ion batteries." New Journal of Chemistry 45, no. 34 (2021): 15458–68. http://dx.doi.org/10.1039/d1nj02841c.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Abbasi, Alireza, Farrokh Mohammadnezhad, and Shokoofeh Geranmayeh. "A Novel 3-D Nanoporous Ce(III) Metal-Organic Framework with Terephthalic Acid; Thermal, Topology, Porosity and Structural Studies." Journal of Inorganic and Organometallic Polymers and Materials 24, no. 6 (September 23, 2014): 1021–26. http://dx.doi.org/10.1007/s10904-014-0086-0.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Phuoc, Ngo Minh, Euiyeon Jung, Nguyen Anh Thu Tran, Young-Woo Lee, Chung-Yul Yoo, Beom-Goo Kang, and Younghyun Cho. "Enhanced Desalination Performance of Capacitive Deionization Using Nanoporous Carbon Derived from ZIF-67 Metal Organic Frameworks and CNTs." Nanomaterials 10, no. 11 (October 22, 2020): 2091. http://dx.doi.org/10.3390/nano10112091.

Full text

Abstract:

Capacitive deionization (CDI) based on ion electrosorption has recently emerged as a promising desalination technology due to its low energy consumption and environmental friendliness compared to conventional purification technologies. Carbon-based materials, including activated carbon (AC), carbon aerogel, carbon cloth, and carbon fiber, have been mostly used in CDI electrodes due their high surface area, electrochemical stability, and abundance. However, the low electrical conductivity and non-regular pore shape and size distribution of carbon-based electrodes limits the maximization of the salt removal performance of a CDI desalination system using such electrodes. Metal-organic frameworks (MOFs) are novel porous materials with periodic three-dimensional structures consisting of metal center and organic ligands. MOFs have received substantial attention due to their high surface area, adjustable pore size, periodical unsaturated pores of metal center, and high thermal and chemical stabilities. In this study, we have synthesized ZIF-67 using CNTs as a substrate to fully utilize the unique advantages of both MOF and nanocarbon materials. Such synthesis of ZIF-67 carbon nanostructures was confirmed by TEM, SEM, and XRD. The results showed that the 3D-connected ZIF-67 nanostructures bridging by CNTs were successfully prepared. We applied this nanostructured ZIF-67@CNT to CDI electrodes for desalination. We found that the salt removal performance was significantly enhanced by 88% for 30% ZIF-67@CNTs-included electrodes as compared with pristine AC electrodes. This increase in salt removal behavior was analyzed by electrochemical analysis such as cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) measurements, and the results indicate reduced electrical impedance and enhanced electrode capacitance in the presence of ZIF-67@CNTs.

APA, Harvard, Vancouver, ISO, and other styles

24

Elmekawy, Ahmed, Qui Quach, and Tarek M. Abdel-Fattah. "Synthesis of a Novel Multifunctional Organic-Inorganic Nanocomposite for Metal Ions and Organic Dye Removals." ECS Meeting Abstracts MA2022-02, no. 8 (October 9, 2022): 672. http://dx.doi.org/10.1149/ma2022-028672mtgabs.

Full text

Abstract:

The pollution induced by the excessive use of heavy metal ions and organic matter in industrial operations results in direct and indirect discharge of pollutants into waterways, affecting human life and environment. For example, cobalt ions and radionuclide 60Co, 58Co, which are used in medicine, can be discharged into the environment during its manufacturing processes. Also, organic materials, such as phenolic components, carbohydrates, and so on, have a high toxicity to human. For example, methylene Blue (MB), ingestion of MB by humans can result in excessive perspiration, nausea, vomiting, neuronal apoptosis, burning sensations, and a variety of other harmful impacts on the body and surroundings. In our research group, nanomaterials have been extensively used in many research projects and applications such as catalysts, energy, photovoltaic, sensors, biomedical and environmental remediation [1-26]. In recent years, it has been discovered that a blend of nanoporous silicates such as Zeolite X (Ze) and activated carbon (AC) can minimize contaminants in waste water. Because activated carbons are often microporous and have large surface areas, they are particularly efficient at adsorbing low molecular weight compounds and larger molecules. The MB and Co(II) ions sorption capabilities of Ze-AC mixture and linked zeolite and activated carbon (Ze-L-AC) via disodium terephthalate linker. The resultant materials (Ze-L-AC composite and Ze-AC mixture) were characterized using Scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier transform infrared spectrometry (FTIR) and Surface area measurements. Also, this study was focused on the adsorption of MB and Co(II) ions in aqueous media. The effects of pH, temperature, time, masses and ionic strength were monitored using absorption spectroscopy. Generally, the Ze-L-AC composite removed MB and Co ions greater than the Ze-AC mixture. For example, the adsorbent capacitance for MB removal was 37 mg/g for Ze-AC mixture and 40 mg/g for Ze-L-AC. Also, the adsorbent capacitance for Co(II) ions removal was 40 mg/g for Ze-AC mixture and 44 mg/g for Ze-L-AC. References C Huff, T Dushatinski, TM Abdel-Fattah, International Journal of Hydrogen Energy 42 (30), 18985-18990 (2017) M Stacey, C Osgood, BS Kalluri, W Cao, H Elsayed-Ali, T Abdel-Fattah, Biomedical Materials 6 (1), 011002 (2011) SE Mohmed Labeb, Abdel-Hamed Sakr, Moataz Soliman, Tarek M.Abdel-Fattah, Optical Materials 79, 331-335 (2018) ME Mahmoud, MM Osman, SB Ahmed, TM Abdel-Fattah, Chemical engineering journal 175, 84-94 (2011) TM Abdel-Fattah, ME Mahmoud, Chemical engineering journal 172 (1), 177-183 (2011) R Bhure, TM Abdel-Fattah, C Bonner, JC Hall, A Mahapatro, Journal of biomedical nanotechnology 6 (2), 117-128 (2010) TM Abdel-Fattah, D Loftis, A Mahapatro, Journal of biomedical nanotechnology 7 (6), 794-800 (2011) OH Elsayed-Ali, T Abdel-Fattah, HE Elsayed-Ali, Journal of hazardous materials 185 (2-3), 1550-1557 (2011) R Bhure, A Mahapatro, C Bonner, TM Abdel-Fattah, Materials Science and Engineering: C 33 (4), 2050-2058 (2013) BE Bishop, BA Savitzky, T Abdel-Fattah, Ecotoxicology and Environmental Safety 73 (4), 565-571 (2010) C Huff, JM Long, A Heyman, TM Abdel-Fattah, ACS Applied Energy Materials 1 (9), 4635-4640 (2018) TM Abdel-Fattah, EM Younes, G Namkoong, EM El-Maghraby, Synthetic Metals 209, 348-354 (2015) SH Lapidus, A Naik, A Wixtrom, NE Massa, V Ta Phuoc, L del Campo, Crystal growth & design 14 (1), 91-100 (2014) A Mahapatro, TD Matos Negrón, C Bonner, TM Abdel-Fattah, Journal of Biomaterials and Tissue Engineering 3 (2), 196-204 (2013) T Dushatinski, C Huff, TM Abdel-Fattah, Applied Surface Science 385, 282-288 (2016) ME Mahmoud, SS Haggag, MA Rafea, TM Abdel-Fattah, Polyhedron 28 (16), 3407-3414 (2009) C Huff, JM Long, A Aboulatta, A Heyman, TM Abdel-Fattah, ECS Journal of Solid State Science and Technology 6 (10), M115 (2017) ME Mahmoud, SS Haggag, TM Abdel-Fattah, Polyhedron 26 (14), 3956-3962 (2007) TM Abdel-Fattah, ME Mahmoud, MM Osmam, SB Ahmed, Journal of Environmental Science and health, part A 49 (9), 1064-1076 (2014) ME Mahmoud, TM Abdel-Fattah, MM Osman, SB Ahmed, Journal of Environmental Science and Health, Part A 47 (1), 130-141 (2012) K Foe, G Namkoong, TM Abdel-Fattah, H Baumgart, MS Jeong, DS Lee, Thin solid films 534, 76-82 (2013) M Abdel-Fattah, A Wixtrom, K Zhang, W Cao, H Baumgart, ECS Journal of Solid State Science and Technology 3 (10), M61 (2014) C Huff, T Dushatinski, A Barzanji, N Abdel-Fattah, K Barzanji, ECS Journal of Solid State Science and Technology 6 (5), M69 (2017) TM Abdel-Fattah, B Bishop, Journal of Environmental Science and Health, Part A 39 (11-12), 2855-2866 (2014) Quach, E. Biehler, A. Elzamzami, C. Huff, J.M. Long, T.M. Abdel Fattah, Catalysts, 11, 118 (2021). E. Biehler, Q. Quach, C. Huff, T. M. Abdel-Fattah, Materials, 15, 2692 (2022).

APA, Harvard, Vancouver, ISO, and other styles

25

Lai, Huazhang, Shuiyan Chen, Xiaoyu Su, Xiaoying Huang, Qin Zheng, Ming Yang, Baode Shen, and Pengfei Yue. "Sponge-liked Silica Nanoporous Particles for Sustaining Release and Long-Term Antibacterial Activity of Natural Essential Oil." Molecules 28, no. 2 (January 6, 2023): 594. http://dx.doi.org/10.3390/molecules28020594.

Full text

Abstract:

To improve the sustained release and long-term antibacterial activity of Chimonanthus nitens Oliv. essential oil (CEO), novel sponge-liked nanoporous silica particles (SNP) were synthesized via the soft template method, which was employed as a biocompatible carrier to prepare spong-liked nanoporous silica particles loading with CEO (CEO-SNP) through physical adsorption. The structure and properties of the samples were characterized via N2 adsorption/desorption measurements, thermogravimetry (TGA), Fourier transform infrared, SEM and TEM. The result showed that the SNP exhibited an excellent loading capability of CEO up to 76.3%. The thermal stability and release behavior of the CEO were significantly improved via the physical adsorption of the SNP materials. The release profile of CEO was in accordance with the first-order kinetic model, which meant that the release mechanism was drug Fick’s diffusion. The antibacterial evaluation results demonstrated that the CEO-SNP exhibited strong antibacterial activity against S. aureus, E. coli and P. aeruginosa. The antibacterial results have shown that the CEO-SNP could destroy the cell structure of bacteria, and result in the generation of oxidative stress and the release of nucleic acid. After storage of 30 d at 25 °C, the CEO-SNP still had the stronger antibacterial activity towards S. aureus, E. coli and P. aeruginosa in comparison with CEO. Therefore, the sponge-like silica nanoporous particles seemed to be a promising carrier for long-term stability and antibacterial delivery of CEO.

APA, Harvard, Vancouver, ISO, and other styles

26

Daraie, Mansoureh, Razieh Mirsafaei, and Majid M. Heravi. "Acid-functionalized Mesoporous Silicate (KIT-5-Pr-SO3H) Synthesized as an Efficient and Nanocatalyst for Green Multicomponent." Current Organic Synthesis 16, no. 1 (February 4, 2019): 145–53. http://dx.doi.org/10.2174/1570179415666181005110543.

Full text

Abstract:

Aim and Objective: KIT-5 nanoporous silica was functionalized with sulfonic acid and SO3H group has been immobilized on nanoporous KIT-5 silica support via in situ method to produce novel nanocatalyst as “KIT-5-Pr-SO3H”. The catalyst was fully characterized by FT-IR, SEM, EDXs, TEM, BET and TGA techniques. The surface morphology images approved that the nanocatalyst particle sizes are around 7-15 nm. The prepared catalyst was efficiently used in the synthesis of benzimidazolo quinazolinones, imidazo[1,2- a]chromeno[4,3-d]pyrimidinone and imidazo[1,2-a]pyrimidine via a multicomponent reaction under green conditions. The easy synthesis condition, environmental compatibility, high specific surface area, reusability for 5 run without loses in any activity, high selectivity, availability of raw material, are the remarkable properties for this new catalyst.Materials and Methods:All reagents were purchased from Aldrich and Merck with high-grade quality and used as received. The structural characteristics of the KIT-5 which was obtained, using three-dimensional large cage type face-centered cubic Fm3m mesoporous silica materials (KIT-5) nanocages were obtained according to the procedure described by Kleitz et al. </P><P> Results: The purpose of this study is developing a new acid-functionalized mesoporous catalyst. Initially, (KIT-5) nanocages were obtained according to the procedure described by Kleitz et al. Then, KIT-5-Pr-SH was prepared by Mercaptopropyltriethoxysilane as illustrated in Scheme 1. In the next step, the solid product was oxidized with H2O2. </P><P> The full characterization for proving the structure of the nano-size particles was achieved using FT-IR, TGA, TEM, SEM, and EDX analysis.Conclusion:Acid-functionalized mesoporous silica has been proved to act as an effective catalyst in various organic reactions. In this project, for the first time, KIT-5 was functionalized by propyl-sulfonic acid as a heterogeneous solid acid catalyst. Sulfonic acid functionalized KIT-5 (KIT-5-Pr-SO3H) performs as an organicinorganic hybrid catalyst, whereas Brønsted acid sites have been selectively generated. In this regard, the catalytic activities of this novel heterogeneous catalyst were successfully examined by the one-pot multicomponent reaction.

APA, Harvard, Vancouver, ISO, and other styles

27

Qiu, Ruiqi, Qiu Xu, Hui Jiang, and Xuemei Wang. "A Novel Enzyme-Free Biosensor Based on Porous Core–Shell Metal Organic Frame Nanocomposites Modified Electrode for Highly Sensitive Detection of Uric Acid and Dopamine." Journal of Biomedical Nanotechnology 15, no. 7 (July 1, 2019): 1443–53. http://dx.doi.org/10.1166/jbn.2019.2791.

Full text

Abstract:

A novel enzyme-free biosensor based on porous metal organic frame nanocomposites, i.e., core–shell structured Au@NC@GC nanocomposites, has been constructed for simultaneous determination of uric acid (UA) and dopamine (DA). Au@ZIF-8@ZIF-67 was prepared through a seed-mediated growth method and carbonized in nitrogen atmosphere to synthesize a nanoporous hybrid carbon materials (Au@NC@GC). Cyclic voltammetry (CV) and differential pulse voltammetry (DPV) studies demonstrate that the as-prepared Au@NC@GC modified glassy carbon electrode (Au@NC@GC-GCE) possesses a high selectivity and sensitivity for simultaneous detections of UA and DA. It exhibited wide linear responses for UA and DA in the range from 10 μM to 600 μM and 10 μM to 150 μM, with the detection limits of 0.773 nM and 0.746 nM, respectively (S/N = 3). Moreover, this novel electrochemical biosensor could be further utilized in biological analysis (i.e., human serum), and the satisfactory recovery results of UA and DA could be readily obtained. These afore-mentioned results further manifest that the as-prepared biosensors are capable for quantitatively monitoring UA and DA in serum, verifying the possibility for its future promising applications in real biological or clinic samples analysis.

APA, Harvard, Vancouver, ISO, and other styles

28

Ariga, Katsuhiko, Tatsuyuki Makita, Masato Ito, Taizo Mori, Shun Watanabe, and Jun Takeya. "Review of advanced sensor devices employing nanoarchitectonics concepts." Beilstein Journal of Nanotechnology 10 (October 16, 2019): 2014–30. http://dx.doi.org/10.3762/bjnano.10.198.

Full text

Abstract:

Many recent advances in sensor technology have been possible due to nanotechnological advancements together with contributions from other research fields. Such interdisciplinary collaborations fit well with the emerging concept of nanoarchitectonics, which is a novel conceptual methodology to engineer functional materials and systems from nanoscale units through the fusion of nanotechnology with other research fields, including organic chemistry, supramolecular chemistry, materials science and biology. In this review article, we discuss recent advancements in sensor devices and sensor materials that take advantage of advanced nanoarchitectonics concepts for improved performance. In the first part, recent progress on sensor systems are roughly classified according to the sensor targets, such as chemical substances, physical conditions, and biological phenomena. In the following sections, advancements in various nanoarchitectonic motifs, including nanoporous structures, ultrathin films, and interfacial effects for improved sensor function are discussed to realize the importance of nanoarchitectonic structures. Many of these examples show that advancements in sensor technology are no longer limited by progress in microfabrication and nanofabrication of device structures – opening a new avenue for highly engineered, high performing sensor systems through the application of nanoarchitectonics concepts.

APA, Harvard, Vancouver, ISO, and other styles

29

Liu, Rong, Xinwei Wang, Junrong Yu, Yan Wang, Jing Zhu, and Zuming Hu. "A Novel Approach to Design Nanoporous Polyethylene/Polyester Composite Fabric via TIPS for Human Body Cooling." Macromolecular Materials and Engineering 303, no. 3 (January 15, 2018): 1700456. http://dx.doi.org/10.1002/mame.201700456.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Joshi, Sahira, Rekha Goswami Shrestha, Raja Ram Pradhananga, Katsuhiko Ariga, and Lok Kumar Shrestha. "High Surface Area Nanoporous Activated Carbons Materials from Areca catechu Nut with Excellent Iodine and Methylene Blue Adsorption." C 8, no. 1 (December 27, 2021): 2. http://dx.doi.org/10.3390/c8010002.

Full text

Abstract:

Nanoporous carbon materials from biomass exhibit a high surface area due to well-defined pore structures. Therefore, they have been extensively used in separation and purification technologies as efficient adsorbents. Here, we report the iodine and methylene blue adsorption properties of the hierarchically porous carbon materials prepared from Areca catechu nut. The preparation method involves the phosphoric acid (H3PO4) activation of the Areca catechu nut powder. The effects of carbonization conditions (mixing ratio with H3PO4, carbonization time, and carbonization temperature) on the textural properties and surface functional groups were studied. The optimum textural properties were obtained at a mixing ratio of 1:1, carbonized for 3 h at 400 °C, and the sample achieved a high specific surface area of 2132.1 m2 g−1 and a large pore volume of 3.426 cm3 g−1, respectively. The prepared materials have amorphous carbon structures and contain oxygenated surface functional groups. Due to the well-defined micro-and mesopore structures with the high surface area and large pore volume, the optimal sample showed excellent iodine and methylene blue adsorption. The iodine number and methylene blue values were ca. 888 mg g−1 and 369 mg g−1, respectively. The batch adsorption studies of methylene dye were affected by pH, adsorbent dose, contact time, and initial concentration. The optimum parameters for the methylene blue adsorption were in alkaline pH, adsorbent dose of 2.8 g L−1, and contact time of 180 min. Equilibrium data could be best represented by the Langmuir isotherm model with a monolayer adsorption capacity of 333.3 mg g−1. Thus, our results demonstrate that the Areca catechu nut has considerable potential as the novel precursor material for the scalable production of high surface area hierarchically porous carbon materials that are essential in removing organic dyes from water.

APA, Harvard, Vancouver, ISO, and other styles

31

Sun, Yuntao, Can Wang, Shengyao Qin, Fengda Pan, Yongyan Li, Zhifeng Wang, and Chunling Qin. "Co3O4 Nanopetals Grown on the Porous CuO Network for the Photocatalytic Degradation." Nanomaterials 12, no. 16 (August 18, 2022): 2850. http://dx.doi.org/10.3390/nano12162850.

Full text

Abstract:

Designing a novel photocatalytic composite for the efficient degradation of organic dyes remains a serious challenge. Herein, the multi-layered Co3O4@NP-CuO photocatalyst with unique features, i.e., the self-supporting, hierarchical porous network as well as the construction of heterojunction between Co3O4 and CuO, are synthesized by dealloying-electrodeposition and subsequent thermal treatment techniques. It is found that the interwoven ultrathin Co3O4 nanopetals evenly grow on the nanoporous CuO network (Co3O4@NP-CuO). The three-dimensional (3D) hierarchical porous structure for the catalyst provides more surface area to act as active sites and facilitates the absorption of visible light in the photodegradation reaction. Compared with the commercial CuO and Co3O4 powders, the newly designed Co3O4@NP-CuO composite exhibits superior photodegradation performance for RhB. The enhanced performance is mainly due to the construction of heterojunction of Co3O4/CuO, greatly promoting the efficient carrier separation for photocatalysis. Furthermore, the possible photocatalytic mechanism is analyzed in detail. This work provides a promising strategy for the fabrication of a new controllable heterojunction to improve photocatalytic activity.

APA, Harvard, Vancouver, ISO, and other styles

32

Yousaf, Afifa, Ali Muhammad Arif, Na Xu, Jie Zhou, Chun-Yi Sun, Xin-Long Wang, and Zhong-Min Su. "A triazine-functionalized nanoporous metal–organic framework for the selective adsorption and chromatographic separation of transition metal ions and cationic dyes and white-light emission by Ln3+ ion encapsulation." Journal of Materials Chemistry C 7, no. 29 (2019): 8861–67. http://dx.doi.org/10.1039/c9tc02786f.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Sai, Huazheng, Meijuan Wang, Changqing Miao, Qiqi Song, Yutong Wang, Rui Fu, Yaxiong Wang, Litong Ma, and Yan Hao. "Robust Silica-Bacterial Cellulose Composite Aerogel Fibers for Thermal Insulation Textile." Gels 7, no. 3 (September 17, 2021): 145. http://dx.doi.org/10.3390/gels7030145.

Full text

Abstract:

Aerogels are nanoporous materials with excellent properties, especially super thermal insulation. However, owing to their serious high brittleness, the macroscopic forms of aerogels are not sufficiently rich for the application in some fields, such as thermal insulation clothing fabric. Recently, freeze spinning and wet spinning have been attempted for the synthesis of aerogel fibers. In this study, robust fibrous silica-bacterial cellulose (BC) composite aerogels with high performance were synthesized in a novel way. Silica sol was diffused into a fiber-like matrix, which was obtained by cutting the BC hydrogel and followed by secondary shaping to form a composite wet gel fiber with a nanoscale interpenetrating network structure. The tensile strength of the resulting aerogel fibers reached up to 5.4 MPa because the quantity of BC nanofibers in the unit volume of the matrix was improved significantly by the secondary shaping process. In addition, the composite aerogel fibers had a high specific area (up to 606.9 m2/g), low density (less than 0.164 g/cm3), and outstanding hydrophobicity. Most notably, they exhibited excellent thermal insulation performance in high-temperature (210 °C) or low-temperature (−72 °C) environments. Moreover, the thermal stability of CAFs (decomposition temperature was about 330 °C) was higher than that of natural polymer fiber. A novel method was proposed herein to prepare aerogel fibers with excellent performance to meet the requirements of wearable applications.

APA, Harvard, Vancouver, ISO, and other styles

34

Apblett, Allen, Nicholas Materer, Evgueni Kadossov, and Shoaib Shaikh. "Superior Monitoring of Chemical Exposure Using Nanoconfinement Technology." Military Medicine 186, Supplement_1 (January 1, 2021): 795–800. http://dx.doi.org/10.1093/milmed/usaa372.

Full text

Abstract:

ABSTRACT Introduction Military personnel are exposed to a broad range of potentially toxic compounds that can affect their health. These hazards are unpredictable because military service occurs in a wide array of uncontrolled environments. Therefore, a novel sorbent was developed that allows the fabrication of lightweight personal samplers that are both capable of sorbing an extremely wide range of organic chemical types and able to stabilize reactive compounds. Materials and Methods OSU-6, a nanoporous silica, was provided by XploSafe LLC. The sorption capacity for several volatile organic compounds, the temperatures required for thermal desorption of adsorbed compounds, and the sampling rates for targeted analytes were determined. Results The uptake capacity was found to be on average 1.5 g/g of sorbent. Analytes were not only held tightly but also could be desorbed upon heating the sorbate to temperatures below 150°C. Sampling rates for volatile organic compound by an OSU-6 sampler badge were on average, 5.7 times higher than those for a commercially available activated carbon badge. Theoretical calculations showed that sorption of volatile organic compounds on the surface of the tightly curved pore walls in OSU-6 is because of exceptionally strong cumulative addition of Van der Waals forces. Analytes could readily be analyzed by either solvent extraction or thermal desorption gas chromatography/mass spectrometry techniques. Excellent sampling rates, high concentrations of analytes in the OSU-6 sorbent matrix, and high desorption efficiencies (recoveries) were obtained using the thermal desorption method. Conclusions The performance of the OSU-6 sorbent makes it highly capable of meeting the need for personal samplers that enable Individual Longitudinal Exposure Records development. It can adsorb an extremely wide array of different volatile organic compounds, it can stabilize reactive compounds, it has high sampling rates coupled with high capacity that provide both sensitivity and resistance to saturation, and it is unique in being very amenable to thermal desorption in combination with having strong sorbate binding and high capacity and surface area.

APA, Harvard, Vancouver, ISO, and other styles

35

Akbari, Masoud, Chiara Crivello, Octavio Graniel, Martial Defort, Skandar Basrour, Kevin Musselman, and David Muñoz-Rojas. "ZIF-Based Metal-Organic Frameworks for Cantilever Gas Sensors." ECS Meeting Abstracts MA2022-01, no. 52 (July 7, 2022): 2144. http://dx.doi.org/10.1149/ma2022-01522144mtgabs.

Full text

Abstract:

Among the different gas sensing platforms, cantilever-based sensors have attracted considerable interest in recent years thanks to their ultra-sensitivity and high-speed response. The gas sensing mechanism in a dynamic cantilever sensor is based on its resonance frequency shift upon adsorption of a gas molecule on the sensor. In order to sensitize the surface of a cantilever, a sensitive receptor material with large surface area is required. Metal-organic frameworks (MOFs) are a class of nanoporous crystalline materials composed of metal ions coordinated to organic linkers. MOFs are promising for gas sensing applications as they have large surface area, rich porosity with adjustable pore size and excellent selective adsorption capability for various gasses.[1] Zeolite imidazole frameworks (ZIFs) are a class of MOFs where metals with tetrahedral coordination (i.e. Zn, Co, Fe, Cu) are the central node and the ligands are imidazolate-based organic molecules. In this work, we developed a ZIF-based thin film for dynamic cantilever gas-sensing applications. We employed a novel atmospheric pressure spatial atomic layer deposition (AP-SALD)[2][3] technique to deposit a ZnO sacrificial layer on the silicon cantilevers. This technique allows the deposition of high-quality films at atmospheric pressure, faster than conventional ALD. The ZnO layer was then converted to a particular ZIF film with desired porosity and size, through a MOF-CVD process.[4] A gas-sensing bench setup was developed for the cantilever actuation and read-out. We present the chemical and morphological properties of the ZIF, as well as the frequency response of the sensor to various gases. The device showed reliable sensitivity to humidity, CO2 and several VOCs. References [1] X. F. Wang, X. Z. Song, K. M. Sun, L. Cheng, and W. Ma, “MOFs-derived porous nanomaterials for gas sensing,” Polyhedron, vol. 152, pp. 155–163, 2018. [2] D. Muñoz-Rojas, T. Maindron, A. Esteve, F. Piallat, J. C. S. Kools, and J. M. Decams, “Speeding up the unique assets of atomic layer deposition,” Mater. Today Chem., vol. 12, pp. 96–120, 2019. [3] K. P. Musselman, C. F. Uzoma, and M. S. Miller, “Nanomanufacturing: High-Throughput, Cost-Effective Deposition of Atomic Scale Thin Films via Atmospheric Pressure Spatial Atomic Layer Deposition,” Chem. Mater., vol. 28, no. 23, pp. 8443–8452, 2016. [4] I. Stassen et al., “Chemical vapour deposition of zeolitic imidazolate framework thin films,” Nat. Mater., vol. 15, no. 3, pp. 304–310, 2016.

APA, Harvard, Vancouver, ISO, and other styles

36

Sakaguchi, Shugo, Koshi Kamiya, Tsuneaki Sakurai, and Shu Seki. "Interactions of Single Particle with Organic Matters: A Facile Bottom-Up Approach to Low Dimensional Nanostructures." Quantum Beam Science 4, no. 1 (February 5, 2020): 7. http://dx.doi.org/10.3390/qubs4010007.

Full text

Abstract:

A particle induces a pack of chemical reactions in nanospace: chemical reactions confined into extremely small space provide an ultimate technique for the nanofabrication of organic matter with a variety of functions. Since the discovery of particle accelerators, an extremely high energy density can be deposited, even by a single isolated particle with MeV-ordered kinetic energy. However, this was considered to cause severe damages to organic molecules due to its relatively small bond energies, and lack of ability to control the reactions precisely to form the structures while retaining physico-chemical molecular functionalities. Practically, the severely damaged area along a particle trajectory: a core of a particle track has been simply visualized for the detection/dosimetry of an incident particle to the matters, or been removed to lead nanopores and functionalized by refilling/grafting of fresh organic/inorganic materials. The use of intra-track reactions in the so-called “penumbra” or “halo” area of functional organic materials has been realized and provided us with novel and facile protocols to provide low dimensional nano-materials with perfect size controllability in the 21st century. These protocols are now referred to as single particle nanofabrication technique (SPNT) and/or single particle triggered linear polymerization technique (STLiP), paving the way towards a new approach for nanomaterials with desired functionalities from original molecules. Herein, we report on the extremely wide applicability of SPNT/STLiP protocols for the future development of materials for opto-electronic, catalytic, and biological applications among others.

APA, Harvard, Vancouver, ISO, and other styles

37

Luo, Jia, Michael Florian Peter Wagner, Nils Ulrich, Peter Kopold, Christina Trautmann, and Maria Eugenia Toimil Molares. "(Digital Presentation) Electrochemical Conversion of Cu Nanowires Synthesized By Electrodeposition in Track-Etched Templates to HKUST-1." ECS Meeting Abstracts MA2022-02, no. 23 (October 9, 2022): 977. http://dx.doi.org/10.1149/ma2022-0223977mtgabs.

Full text

Abstract:

Metal-organic frameworks (MOFs) are a novel type of nanoporous materials that have attracted widespread attention over the past two decades [1]. Cu-based metal-organic frameworks such as Cu3(BTC)2 (also known as HKUST-1) are one of the most famous MOF representatives, which exhibit a huge open porosity and thus a remarkably capacity to store and uptake different gases [2, 3]. Recently, increasing efforts are devoted toward finding synthetic routes that enable downsizing MOF crystals to the nanoscale. Achieving control over the size and shape of nanoMOFs and finding ways to assemble them is essential for their exploitation in integrated devices such as sensors, gas separation membranes or photoelectrodes. In this study we explore the conversion of free-standing arrays Cu nanowires with controlled diameter and length synthesized by electrodeposition in etched ion-track membranes into HKUST-1. In a first process step, free-standing Cu wires are produced by dissolving the ion-track polymer template. In a second step, the wires are converted into HKUST-1 structures by electrochemical oxidation. Applying 2.5 V versus a Cu counter electrode, the Cu nanowires are oxidatively dissolved and the MOF is built up as the as-formed Cu2+ ions bind to the BTC3− ligands in the electrolyte solution. The morphology and crystallinity of the samples at different transformation stages is investigated by scanning electron microscopy (Fig. 1) and transmission electron microscopy, respectively. X-ray diffraction spectra measured at different conversion times reveal the appearance of the characteristic reflections of HKUST-1. These results will be compared with previous studies of the transformation of Cu nanowires to HKUST-1 nanowires inside the polymer membrane [4]. Figure 1: SEM images of cylindrical Cu nanowires (a) before and (b) during the electrochemical conversion process, and (c) of a representative octahedral particle after complete conversion to HKUST-1. References [1] Freund R, Canossa S, Cohen SM, Yan W, Deng et al. Angewandte Chemie International Edition. (2021) 2: 23946-23974 [2] Chui SS-Y, Lo SM-F, Charmant JP, Orpen AG, Williams ID. Science. (1999) 283:1148-50. [3] Li H, Li L, Lin R-B, Zhou W, Zhang Z, Xiang S, et al. EnergyChem. (2019) 1:100006. [4] Caddeo F, Vogt R, Weil D, Sigle W, Toimil-Molares ME, Maijenburg AW. ACS applied materials & interfaces . (2019)11:25378-87. Figure 1

APA, Harvard, Vancouver, ISO, and other styles

38

Li, Man, Tao Chen, Seunghyun Song, Yang Li, and Joonho Bae. "HKUST-1@IL-Li Solid-state Electrolyte with 3D Ionic Channels and Enhanced Fast Li+ Transport for Lithium Metal Batteries at High Temperature." Nanomaterials 11, no. 3 (March 15, 2021): 736. http://dx.doi.org/10.3390/nano11030736.

Full text

Abstract:

The challenge of safety problems in lithium batteries caused by conventional electrolytes at high temperatures is addressed in this study. A novel solid electrolyte (HKUST-1@IL-Li) was fabricated by immobilizing ionic liquid ([EMIM][TFSI]) in the nanopores of a HKUST-1 metal–organic framework. 3D angstrom-level ionic channels of the metal–organic framework (MOF) host were used to restrict electrolyte anions and acted as “highways” for fast Li+ transport. In addition, lower interfacial resistance between HKUST-1@IL-Li and electrodes was achieved by a wetted contact through open tunnels at the atomic scale. Excellent high thermal stability up to 300 °C and electrochemical properties are observed, including ionic conductivities and Li+ transference numbers of 0.68 × 10−4 S·cm−1 and 0.46, respectively, at 25 °C, and 6.85 × 10−4 S·cm−1 and 0.68, respectively, at 100 °C. A stable Li metal plating/stripping process was observed at 100 °C, suggesting an effectively suppressed growth of Li dendrites. The as-fabricated LiFePO4/HKUST-1@IL-Li/Li solid-state battery exhibits remarkable performance at high temperature with an initial discharge capacity of 144 mAh·g−1 at 0.5 C and a high capacity retention of 92% after 100 cycles. Thus, the solid electrolyte in this study demonstrates promising applicability in lithium metal batteries with high performance under extreme thermal environmental conditions.

APA, Harvard, Vancouver, ISO, and other styles

39

Yao, Zhuo, Dianli Qu, Yuxiang Guo, Yujing Yang, and Hong Huang. "Fabrication and Characteristics of Mn@ Cu3(BTC)2 for Low-Temperature Catalytic Reduction of NOx with NH3." Advances in Materials Science and Engineering 2019 (October 31, 2019): 1–9. http://dx.doi.org/10.1155/2019/2935942.

Full text

Abstract:

Novel catalysts with high activity for the selective catalytic reduction of NO with NH3 (NH3-SCR) at low temperatures are highly demanded. In this study, mixed-node metal-organic frameworks (MOFs), e.g. Mn@CuBTC with controlled Mn composition in Cu3(BTC)2, were fabricated using postsynthetic exchange method and their structural characteristics and catalytic performances for NH3-SCR reaction were assessed. A series of analyses in terms of structure, surface morphology, texture, and chemical state determined that Mn ions were successfully incorporated into the Cu3(BTC)2 crystal lattice as well as adsorbed on the walls of nanopores in the framework. The pore sizes can be finely tuned in the presence of Mn ions in the cages, which significantly suppressed water adsorption. The NH3-SCR activity of Mn@CuBTC exhibited nearly 100% NOx conversion rate in the temperature range (230–260°C). The superior NH3-SCR performance is attributed to the proper pore sizes, reduced water content, and the synergistic effect between manganese and copper ions in the MOF structure, which enhanced NH3 bound to the active Lewis sites.

APA, Harvard, Vancouver, ISO, and other styles

40

Jing, Feng-Ya, and Yu-Qing Zhang. "Unidirectional Nanopore Dehydration Induces an Anisotropic Polyvinyl Alcohol Hydrogel Membrane with Enhanced Mechanical Properties." Gels 8, no. 12 (December 8, 2022): 803. http://dx.doi.org/10.3390/gels8120803.

Full text

Abstract:

As a biocompatible, degradable polymer material, polyvinyl alcohol (PVA) can have a wide range of applications in the biomedical field. PVA aqueous solutions at room temperature can be cast into very thin films with poor mechanical strength via water evaporation. Here, we describe a novel dehydration method, unidirectional nanopore dehydration (UND). The UND method was used to directly dehydrate a PVA aqueous solution to form a water-stable, anisotropic, and mechanically robust PVA hydrogel membrane (PVAHM), whose tensile strength, elongation at break, and swelling ratio reached values of up to ~2.95 MPa, ~350%, and ~350%, respectively. The film itself exhibited an oriented arrangement of porous network structures with an average pore size of ~1.0 μm. At 70 °C, the PVAHMs formed were even more mechanically robust, with a tensile strength and elongation at break of 10.5 MPa and 891%, almost 3.5 times and 2 times greater than the PVAHM prepared at 25 °C, respectively. The processing temperature affects the velocity at which the water molecules flow unidirectionally through the nanopores, and could, thus, alter the overall transformation of the PVA chains into a physically crosslinked 3D network. Therefore, the temperature setting during UND can control the mechanical properties of the hydrogel membrane to meet the requirements of various biomaterial applications. These results show that the UND can induce the ordered rearrangement of PVA molecular chains, forming a PVAHM with superior mechanical properties and exhibiting a greater number of stronger hydrogen bonds. Therefore, the novel dehydration mode not only induces the formation of a mechanically robust and anisotropic PVA hydrogel membrane with a porous network structure and an average pore size of ~1.0 μm, but also greatly enhances the mechanical properties by increasing the temperature. It may be applied for the processing of water-soluble polymers, including proteins, as novel functional materials.

APA, Harvard, Vancouver, ISO, and other styles

41

Nangia, Ashwini. "Organic nanoporous structures." Current Opinion in Solid State and Materials Science 5, no. 2-3 (April 2001): 115–22. http://dx.doi.org/10.1016/s1359-0286(00)00038-3.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

Sasaki, Takafumi, Shoji Nagaoka, Teppei Tezuka, Yoshiaki Suzuki, Masaya Iwaki, and Hiroyoshi Kawakami. "Preparation of novel organic-inorganic nanoporous membranes." Polymers for Advanced Technologies 16, no. 9 (2005): 698–701. http://dx.doi.org/10.1002/pat.639.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Noguchi, Hiroshi, Atsushi Kondo, Daisuke Noguchi, Dong Young Kim, Tomonori Ohba, Cheol-Min Yang, Hirofumi Kanoh, and Katsumi Kaneko. "Adsorptive Properties of Novel Nanoporous Materials." JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 40, no. 13 (2007): 1159–65. http://dx.doi.org/10.1252/jcej.07we211.

Full text

APA, Harvard, Vancouver, ISO, and other styles

44

Gin, D. L., and W. Gu. "Nanoporous Catalytic Materials with Organic Frameworks." Advanced Materials 13, no. 18 (September 2001): 1407–10. http://dx.doi.org/10.1002/1521-4095(200109)13:18<1407::aid-adma1407>3.0.co;2-0.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Pergher, Sibele, and Enrique Rodríguez-Castellón. "Nanoporous Materials and Their Applications." Applied Sciences 9, no. 7 (March 29, 2019): 1314. http://dx.doi.org/10.3390/app9071314.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Liu, Qingquan, Zhe Tang, Minda Wu, Bo Liao, Hu Zhou, Baoli Ou, Guipeng Yu, Zhihua Zhou, and Xiaojuan Li. "Novel ferrocene-based nanoporous organic polymers for clean energy application." RSC Advances 5, no. 12 (2015): 8933–37. http://dx.doi.org/10.1039/c4ra12834f.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

Muralidharan, Vijayanand, and Chung-Yuen Hui. "Stability of Nanoporous Materials." Macromolecular Rapid Communications 25, no. 16 (August 26, 2004): 1487–90. http://dx.doi.org/10.1002/marc.200400190.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

Van Riet, Romuald, Eder Amayuelas, Peter Lodewyckx, Michel H. Lefebvre, and Conchi O. Ania. "Novel opportunities for nanoporous carbons as energetic materials." Carbon 164 (August 2020): 129–32. http://dx.doi.org/10.1016/j.carbon.2020.03.061.

Full text

APA, Harvard, Vancouver, ISO, and other styles

49

Ryder, M. R., and J.-C. Tan. "Nanoporous metal organic framework materials for smart applications." Materials Science and Technology 30, no. 13 (April 28, 2014): 1598–612. http://dx.doi.org/10.1179/1743284714y.0000000550.

Full text

APA, Harvard, Vancouver, ISO, and other styles

50

Xiao, Bo, and Qingchun Yuan. "Nanoporous metal organic framework materials for hydrogen storage." Particuology 7, no. 2 (April 2009): 129–40. http://dx.doi.org/10.1016/j.partic.2009.01.006.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Journal articles on the topic 'Novel Nanoporous Organic Materials'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles