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Journal articles on the topic 'Meso Porous Materials'

Author: Grafiati
Published: 7 September 2023

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1

Shen, J. L., and C. F. Cheng. "Photoluminescence of MCM meso-porous materials." Current Opinion in Solid State and Materials Science 7, no. 6 (December 2003): 427–33. http://dx.doi.org/10.1016/j.cossms.2004.02.006.

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2

Solano-Umaña, Victor, and José Roberto Vega-Baudrit. "Micro, Meso and Macro Porous Materials on Medicine." Journal of Biomaterials and Nanobiotechnology 06, no. 04 (2015): 247–56. http://dx.doi.org/10.4236/jbnb.2015.64023.

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3

CORMA, A., and D. KUMAR. "ChemInform Abstract: Micro- and Meso-Porous Materials as Catalysts." ChemInform 29, no. 4 (June 24, 2010): no. http://dx.doi.org/10.1002/chin.199804246.

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4

Yang, Xiao-Yu, Li-Hua Chen, Yu Li, Joanna Claire Rooke, Clément Sanchez, and Bao-Lian Su. "Hierarchically porous materials: synthesis strategies and structure design." Chemical Society Reviews 46, no. 2 (2017): 481–558. http://dx.doi.org/10.1039/c6cs00829a.

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5

Vila, Mercedes, Isabel Izquierdo-Barba, Alexis Bourgeois, and María Vallet-Regí. "Bimodal meso/macro porous hydroxyapatite coatings." Journal of Sol-Gel Science and Technology 57, no. 1 (September 21, 2010): 109–13. http://dx.doi.org/10.1007/s10971-010-2330-6.

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6

Chen, Fei, Xue Rui He, Qing Xia Hu, Heng Chao, and Kai Yi. "Modeling of Sound Absorption Propertes of Porous Asphalt Pavement Based on Electro--Acoustic Theory." Key Engineering Materials 929 (August 24, 2022): 129–34. http://dx.doi.org/10.4028/p-twb595.

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A meso-geometric model of pore network was established to predict the sound absorption performance of porous asphalt mixture.Based on characteristics of the pore structure of porous asphalt mixture, the meso-structure model of porous asphalt mixture was established by using physical geometry principle.For the meso-void structure, the electro-acoustical equivalent circuit was established based on electro--acoustic theory, and the relationship between the sound absorption coefficient and the total impedance was established.The model was verified by image processing technology and standing wave ratio method.DIP image processing technology was used to determine these void structure parameters of porous asphalt mixture specimens, and standing wave tube method was used to test the sound absorption coefficient of specimens.The data predicted by the model was compared with the measured data.The results show that the model of meso-void structure and the model of sound absorption coefficient of porous asphalt mixture based on electro--acoustic theory are feasible and effective.
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7

Remaki, B., C. Populaire, V. Lysenko, and D. Barbier. "Electrical barrier properties of meso-porous silicon." Materials Science and Engineering: B 101, no. 1-3 (August 2003): 313–17. http://dx.doi.org/10.1016/s0921-5107(02)00731-6.

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8

Nagrath, Malvika, Alireza Rahimnejad Yazdi, Aran Rafferty, Dermot Daly, Saeed Ur Rahman, Reid C. Gallant, Heyu Ni, Praveen R. Arany, and Mark R. Towler. "Tantalum-containing meso-porous glass fibres for hemostatic applications." Materials Today Communications 27 (June 2021): 102260. http://dx.doi.org/10.1016/j.mtcomm.2021.102260.

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9

Klavetter, Kyle C., Stephany Garcia, Naween Dahal, Jonathan L. Snider, J. Pedro de Souza, Trevor H. Cell, Mark A. Cassara, Adam Heller, Simon M. Humphrey, and C. Buddie Mullins. "Li- and Na-reduction products of meso-Co3O4form high-rate, stably cycling battery anode materials." J. Mater. Chem. A 2, no. 34 (2014): 14209–21. http://dx.doi.org/10.1039/c4ta02684e.

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10

Li, Fang Fei, Mao Sheng Xia, and Yin Shan Jiang. "Various Morphology of Hierarchical Pore-Structured Compound: MCM-41/Diatomite and its Adsorption Behavior for Methylene Blue." Advanced Materials Research 690-693 (May 2013): 3533–40. http://dx.doi.org/10.4028/www.scientific.net/amr.690-693.3533.

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Hierarchical porous materials attract considerable attentions due to their interesting structures and superior adsorption capabilities. In this work, a novel macro- and meso-porous hierarchical material, MCM-41/diatomite, has successfully been synthesized from natural diatomite and tetraethoxysilane by basic hydrothermal method. Nitrogen adsorption/desorption isotherms, low angle XRD and SEM analysis were carried out to character the multiple porous structure and morphology of MCM-41/diatomite. The resultant compound displayed high specific surface area (862~1041 m2/g) and macro-meso-porous hierarchical structure. The morphology of MCM-41/diatomite could be various, such as worm-like, grape-like, flocky, and acaleph-like, due to different ratio between TEOS, PEG, and NaOH. Moreover, the results of adsorption experiments show that some of the resultant MCM-41/diatomite display stronger adsorption capabilities than simply mesoporous MCM-41, due to the macro-meso-porous hierarchical structure, which would further extend the application of MCM-41/diatomite as adsorbent and catalyst support.
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11

Hu, Shu Long, Jian Lv, Feng Ying Lu, Hua Shan Liu, and De Ming Zeng. "Friction and Rheological Properties of Meso-Porous MCM-41/Unsaturated Polyester In Situ Composites." Applied Mechanics and Materials 599-601 (August 2014): 18–21. http://dx.doi.org/10.4028/www.scientific.net/amm.599-601.18.

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In this paper, meso-porous MCM-41 was synthesized at room temperature using cationic surfactant cetyltrimethylammonium bromide (CTAB) as the template agent. Then MCM-41/unsatura-ted polyester resin (UPR) materials were prepared by in-situ polymerization with the meso-porous MCM-41. MCM-41/UPR in-situ composites were prepared by roller milling and molding processes. Effects of meso-porous MCM-41 on rheological properties and wear resistance of the MCM-41/UPR composites have been investigated. It is shown that MCM-41 has a diameter in range of 4-5 nm and the pores are highly ordered. MCM-41 can improve the rheological properties and wear resistance of the composites. When MCM-41 content is 2%, the mass abrasion loss is decreased by 37.4%.
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12

Kim, Myeongjin, Hyun Ju, and Jooheon Kim. "Oxygen-doped porous silicon carbide spheres as electrode materials for supercapacitors." Physical Chemistry Chemical Physics 18, no. 4 (2016): 3331–38. http://dx.doi.org/10.1039/c5cp06438d.

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Oxygen-containing functional groups were introduced onto the surface of the micro- and meso-porous silicon carbide sphere (MMPSiC) in order to investigate the relationship between the electric double layer properties and pseudo-capacitive properties; the degree of oxidation of MMPSiC was also optimized.
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13

Shin, Chang-Kyo, Rahul B. Kawthekar, and Geon-Joong Kim. "Application of the Bimodal Meso/Macroporous Composite Synthesized from MCM-41 Sol." Journal of Nanoscience and Nanotechnology 7, no. 11 (November 1, 2007): 3876–79. http://dx.doi.org/10.1166/jnn.2007.052.

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A route to synthesize porous materials with a bimodal macro/mesoscopic pore system has been investigated in this work. Polystyrene with sub-micrometer size was used as a template in the synthesis. The resulting mesoporous silica wall replicated inversely the morphology of polystyrene template and had highly ordered three-dimensional arrays of macro pores. Large and moldable meso/macro porous silica monoliths could be obtained in centimeter scale by using monodispersed polystyrene beads and MCM-41 sol solutions. These bimodal structured porous silicates have been used as supports for asymmetric kinetic resolution of racemic epoxides to synthesize optically pure epoxide.
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14

Dai, Jingjing, and Hongbo Zhang. "Recent Advances in Catalytic Confinement Effect within Micro/Meso‐Porous Crystalline Materials." Small 17, no. 22 (March 16, 2021): 2005334. http://dx.doi.org/10.1002/smll.202005334.

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15

Lee, Y. C., Y. L. Liu, W. Z. Lee, C. K. Wang, J. L. Shen, P. W. Cheng, C. F. Cheng, and T. Y. Lin. "Temperature-dependent photoluminescence in meso-porous MCM nanotubes." physica status solidi (a) 201, no. 14 (November 2004): 3188–92. http://dx.doi.org/10.1002/pssa.200406887.

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16

Sun, Yuan, Xin Liu, Chenggong Sun, Waleed Al-Sarraf, Khai Zhen Foo, Yang Meng, Stevens Lee, Wenlong Wang, and Hao Liu. "Synthesis and functionalisation of spherical meso-, hybrid meso/macro- and macro-porous cellular silica foam materials with regulated pore sizes for CO2 capture." Journal of Materials Chemistry A 6, no. 46 (2018): 23587–601. http://dx.doi.org/10.1039/c8ta06224b.

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Porous cellular silica materials with nano-foamed wall structures have been developed for preparing supported polyamines for CO2 capture, with CO2 capacities reaching 5.85 mmol CO2 per g PEI-600, 6.44 mmol per g PEI-600/TEPA and 4.4 mmol per g PEI-60 000.
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17

Kim, Min-Kun, Min-Seob Kim, Jae-Hyuk Park, Jin Kim, Chi-Yeong Ahn, Aihua Jin, Junyoung Mun, and Yung-Eun Sung. "Bi-MOF derived micro/meso-porous Bi@C nanoplates for high performance lithium-ion batteries." Nanoscale 12, no. 28 (2020): 15214–21. http://dx.doi.org/10.1039/d0nr03219k.

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Micro/meso-porous Bi@C nanoplates are synthesized by pyrolyzing Bi-based MOFs prepared by a microwave-assisted hydrothermal method to overcome huge volume expansion and pulverization of anode materials during battery operation.
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18

P., Korobko, Kuzmov A., Shtern M., and Kirkova O. "Effective plastic behavior of porous materials with an inverse opal structure." Uspihi materialoznavstva 2023, no. 6 (June 1, 2023): 32–40. http://dx.doi.org/10.15407/materials2023.06.032.

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Based on the theoretical principles of the mechanics of composites, the effective plastic behavior of a porous material with a periodic inverse opal structure under uniaxial loading was studied in detail by means of finite element modeling. The creation of such materials is based on the inversion of pores and skeleton of partially sintered dense packing of polystyrene spheres. Electrodeposited nickel was used as the skeleton of the porous material. According to the macroscopic uniaxial loading or unloading, was finding a stress-strain state at the meso-level. For this, equilibrium equations were solved at the meso-level using special boundary conditions for a periodic unit cell. Such boundary conditions relate the problem of equilibrium at the meso-level with the "effective" deformations of the composite. This made it possible to calculate macroscopic residual strains after a cycle of uniaxial loading and unloading and iteratively find the value of effective stress corresponding to residual strains of 0.2%. In this way, the yield strength of inverse opal for uniaxial loading is calculated. At the same time, as a result of finite-element calculations, the transverse deformations coefficient (plastic Poisson ratio) is determined. This coefficient, in turn, makes it possible to approximate the general plastic behavior of the metamaterial by an elliptic yield curve in the plane of invariants of the stress tensor. Invariants mean average pressure and von Mises stress. These calculations were performing for several cases of the inverse opal structure, both with and without an additional coating. Yield stresses under any type of material loading are very sensitive to porosity. In particular, the application of an additional coating, even with a thickness less than 0,05 of the diameter of the spherical pores (initial polymer particles), causes an increase in the yield strength several times. Keywords: metamaterials, inverse opal, porous plasticity model, micromechanics, theory of plasticity.
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19

Hussain, Mazhar, Shakeel Ahmad, and Wen Quan Tao. "Lattice Boltzmann Modeling of the Effective Thermal Conductivity for Complex Structured Multiphase Building Materials." Advanced Materials Research 1119 (July 2015): 694–99. http://dx.doi.org/10.4028/www.scientific.net/amr.1119.694.

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The effective thermal conductivity is an important parameter used to predict the thermal performance analysis of complex structured porous building materials. The observation of porous structure of building materials on REV (representative elementary volume) scale showed that pores can be classified into meso and macro pores. In contrast to the traditional models usually used for the (macro-meso) pore connection , a new numerical random generation macro-meso pores (RGMMP) method, based on geometrical and morphological information acquired from measurements or experimental calculations, is proposed here. Along with proposed structure generating tool RGMMP a high efficiency LBM, characterized with the energy conservation and appropriate boundary conditions at numerous interfaces in the complex system, for the solution of the governing equation is described which yields a powerful numerical tool to obtain accurate solutions. Then present model is validated with some theoretical and experimental values of effective thermal conductivity of typical building materials. The comparison of present model and experimental results shows that the proposed model agrees much better with the experimental data than the traditional theoretical models. Therefore, the present model is not limited to the described building materials but can also be used for predicting the effective thermal conductivity of any type of complex structured building materials.
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20

Towata, Atsuya, Manickam Sivakumar, Kyuichi Yasui, Toru Tuziuti, Teruyuki Kozuka, Kazutoku Ohta, and Yasuo Iida. "Fabrication of bimodal (meso/macro) porous alumina materials using yeast cells as templates." e-Journal of Surface Science and Nanotechnology 3 (2005): 405–11. http://dx.doi.org/10.1380/ejssnt.2005.405.

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21

Weinberger, Christian, Simon Vetter, Michael Tiemann, and Thorsten Wagner. "Assessment of the density of (meso)porous materials from standard volumetric physisorption data." Microporous and Mesoporous Materials 223 (March 2016): 53–57. http://dx.doi.org/10.1016/j.micromeso.2015.10.027.

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22

Muzakky, Muzakky, and Supriyanto C. "Modification of Three Types of Bentonite with Zirconium Oxide Chloride (ZOC) of Local Products Using Intercalation Process." Indonesian Journal of Chemistry 16, no. 1 (March 15, 2018): 14. http://dx.doi.org/10.22146/ijc.21171.

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Three types of bentonite modified with ZOC local products of Center for Accelerator Science and Technology-National Nuclear Energy Agency using intercalation process have been done. The purpose of this research is to create new material as a catalyst or industrial raw materials. Existance of chloride anion on the intercalation process product was releasing with water and titration using silver nitrate. The release of alkali and alkaline earth cations and Fe3+, Al3+ and Zn3+ into the water phase (WP) and the solids phase (SP) was detected by atomic absorption Spectrometry (AAS). While X-Ray Fluorescence (XRF) was to observe of Zr intercalated to bentonite layer. Modificated products were form of a porous material and their measured as micro, meso and macro pores using Surface Area Analysis (SAA) and the image of the porous material was observed by Transmission Electron Microscopy (TEM). Intercalation process products obtained were porous materials with a porous size of 1.50-1.55 nm at bentonite-3 with a pore area of 2250 (m2/Å/g) and TEM image of the 50 nm was the most transparent among the others. As for the pores size of 1.60-1.97 nm to meso pores size of 2.0-50.0 nm were dominated by bentonite 2 with a maximum of pore 1250 (m2/Å/g). While the results of the TEM image of bentonite 2, although their porous degree were small they have the pores size distribution of 5.7% micro-pore, 52.5% meso-pore and 41.7% macro-pore.
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23

Moula, Marwa, Sylvain Meille, Vincent Le Corre, and Jérôme Chevalier. "Mechanical characterization of meso-porous alumina by micro- and nano-indentation." Materials Today Communications 25 (December 2020): 101315. http://dx.doi.org/10.1016/j.mtcomm.2020.101315.

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24

Inada, Takeshi, Naoki Uno, Takeharu Kato, and Yuji Iwamoto. "Meso-Porous Alumina Capillary Tube as a Support for High-Temperature Gas Separation Membranes by Novel Pulse Sequential Anodic Oxidation Technique." Journal of Materials Research 20, no. 1 (January 2005): 114–20. http://dx.doi.org/10.1557/jmr.2005.0016.

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A meso-porous anodic alumina capillary tube (MAAC) having highly oriented radial meso-pore channels with a minimum diameter of 3 nm has been successfully synthesized using a novel pulse sequential anodic oxidation technique at 100 Hz of pulse frequency. A value resulting in a high channel-pore formation rate at 1 V of the pulse sequential voltage was determined to be the optimum pulse frequency for the anodization. Transmission electron microscopy observation and N2 sorption analysis revealed that controlling the minimum pore channel diameter at 3 nm was possible by the voltage of 1 V. The gas permeance according to Knudsen’s diffusion mechanism was demonstrated at 500 °C, by evaluating gas permeation properties through the meso-porous anodic alumina capillary tube with radial meso-pore channels with minimum diameter of 3 nm, achieving hydrogen permeance of 1.8 × 10−6 mol/m2 s Pa.
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25

Impens, N. R. E. N., P. van der Voort, and E. F. Vansant. "Silylation of micro-, meso- and non-porous oxides: a review." Microporous and Mesoporous Materials 28, no. 2 (April 1999): 217–32. http://dx.doi.org/10.1016/s1387-1811(98)00239-x.

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26

Yang, Xiao-Yu, Yu Li, Arnaud Lemaire, Jia-Guo Yu, and Bao-Lian Su. "Hierarchically structured functional materials: Synthesis strategies for multimodal porous networks." Pure and Applied Chemistry 81, no. 12 (November 30, 2009): 2265–307. http://dx.doi.org/10.1351/pac-con-09-05-06.

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Hierarchically porous materials displaying multimodal pore sizes are desirable for their improved flow performance coupled with high surface areas. In the last five years, a tremendous amount of research has focused upon the synthesis and applications of hierarchically porous materials. This review aims to open up a new avenue of research in this exciting field. At first, recent progress in the synthesis of hierarchically porous materials, targeted through templating methods, is reviewed. These synthesis methods involve a supermolecular assembly of amphiphilic polymers or surfactants combined with second surfactant systems or with macrotemplates such as solid particles, liquid drops, and air bubbles. The preparation procedures using surfactants combined with other chemical or physical methods, controlled phase-separation, or template replication will also be discussed. Subsequently, an innovative procedure concerning the self-formation of hierarchically porous materials is thoroughly examined. This self-formation procedure is based on a self-generated porogen mechanism. Porogens such as alcohol molecules can be precisely controlled at the molecular level to design new hierarchically porous materials. Most of these synthesis methods allow an easy and independent adjustment to the multiporosity of a material, i.e., its micro-, meso-, and macroporosity.
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27

Kamoun, Naoufel, Fakher Jamoussi, and Miguel A. Rodríguez. "The preparation of meso-porous membranes from Tunisian clay." Boletín de la Sociedad Española de Cerámica y Vidrio 59, no. 1 (January 2020): 25–30. http://dx.doi.org/10.1016/j.bsecv.2019.06.001.

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28

Wang, Jintian, Junzhang Wang, Wei Liu, Xingzhong Guo, and Hui Yang. "Sol–gel synthesis of Dictyophora-shaped hierarchically porous Mn2SnO4/C materials as anodes for Li-ion batteries." New Journal of Chemistry 45, no. 21 (2021): 9538–49. http://dx.doi.org/10.1039/d1nj00483b.

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Dictyophora-shaped porous Mn2SnO4/C composite materials were prepared by a sol–gel process accompanied by phase separation. The samples possess a well-defined interconnected micro–meso–macroporous structure which benefits the cycling performance for Li-ion batteries.
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29

Suzuki, Yoshikazu, and Peter E. D. Morgan. "Meso- and Macroporous Ceramics by Phase Separation and Reactive Sintering Methods." MRS Bulletin 34, no. 8 (August 2009): 587–91. http://dx.doi.org/10.1557/mrs2009.158.

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AbstractControlled pore glasses are formed through selective etching of one phase of a spinodally decomposed borosilicate glass, an old technique that is the basis of the porous Vycor synthesis technique developed in the 1920s. This technique is receiving renewed attention as these glasses find new applications as substrates for biosensing, bioreactors, precise filtration, and chromatography. Analogous techniques are being applied to crystalline ceramics, such as directed cooling of ZrO2/MgO and MgAl2O4/Al2O3 eutectics to drive phase separation with the subsequent dissolution of one phase. Pyrolytic reactive sintering is a combination of the phase separation method and the reactive sintering method to obtain a 3D porous structure network. For example, dolomite (CaMg[CO3]2) and ZrO2 yield a uniformly porous CaZrO3/MgO composite that utilizes evolved CO2 as a “pore-forming agent.” This article gives an overview of recent developments on meso- and macroporous ceramics based on phase separation and reactive sintering technologies.
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30

SU, FABING, LU LV, and X. S. ZHAO. "SYNTHESIS OF NANOSTRUCTURED POROUS CARBON." International Journal of Nanoscience 04, no. 02 (April 2005): 261–68. http://dx.doi.org/10.1142/s0219581x05003127.

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In this paper, high-surface-area porous carbons with crumpled nanowalls were synthesized by carbonization of sucrose in the presence of zeolite template. The pore structures of the carbon materials were characterized using physical adsorption of nitrogen. Their surface chemistry was analyzed using X-ray photoelectron spectrometer (XPS). The microscopic structure features of the samples were imaged by field-emission scanning electron microscope (FESEM) and transmission electron microscopy (TEM). The nanostructure of synthesized porous carbon with a combination of micro-, meso- and macropores has been obtained.
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31

Gentile, Francesco, Maria Laura Coluccio, Remo Proietti Zaccaria, Marco Francardi, Gheorghe Cojoc, Gerardo Perozziello, Raffaella Raimondo, Patrizio Candeloro, and Enzo Di Fabrizio. "Selective on site separation and detection of molecules in diluted solutions with super-hydrophobic clusters of plasmonic nanoparticles." Nanoscale 6, no. 14 (2014): 8208–25. http://dx.doi.org/10.1039/c4nr00796d.

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32

Zheng, Cheng, Li Qi, Masaki Yoshio, and Hongyu Wang. "Cooperation of micro- and meso-porous carbon electrode materials in electric double-layer capacitors." Journal of Power Sources 195, no. 13 (July 2010): 4406–9. http://dx.doi.org/10.1016/j.jpowsour.2010.01.041.

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33

Kang, Jun, Oi Lun Li, and Nagahiro Saito. "Hierarchical meso–macro structure porous carbon black as electrode materials in Li–air battery." Journal of Power Sources 261 (September 2014): 156–61. http://dx.doi.org/10.1016/j.jpowsour.2014.03.072.

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34

Huang, Qinglin, Mladen Eić, Huining Xiao, and Serge Kaliaguine. "Characterization of the diffusion path in micro- and meso-porous materials from ZLC analysis." Adsorption 16, no. 6 (August 5, 2010): 531–39. http://dx.doi.org/10.1007/s10450-010-9258-6.

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35

Krishna, R., and J. M. van Baten. "Unified Maxwell–Stefan description of binary mixture diffusion in micro- and meso-porous materials." Chemical Engineering Science 64, no. 13 (July 2009): 3159–78. http://dx.doi.org/10.1016/j.ces.2009.03.047.

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36

Jia, Miaomiao, Lei Mai, Zhanjun Li, and Wanbin Li. "Air-thermal processing of hierarchically porous metal–organic frameworks." Nanoscale 12, no. 26 (2020): 14171–79. http://dx.doi.org/10.1039/d0nr02899a.

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An air-thermal processing strategy is developed to remove residual solvents and uncoordinated linkers for redesigning metal–organic frameworks with improved adsorption proprieties and hierarchically micro/meso/macroporous superstructures.
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37

Ho, Chunman, Jimmy C. Yu, Xinchen Wang, Sukyin Lai, and Yongfu Qiu. "Meso- and macro-porous Pd/CexZr1–xO2 as novel oxidation catalysts." Journal of Materials Chemistry 15, no. 22 (2005): 2193. http://dx.doi.org/10.1039/b500902b.

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38

KAWAGUCHI, Takazo, and Tateo USUI. "Summarized Achievements of the Porous Meso-mosaic Texture Sinter Research Project." ISIJ International 45, no. 4 (2005): 414–26. http://dx.doi.org/10.2355/isijinternational.45.414.

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39

Leon, Xairo, Edith Osorio, Rene Pérez-Cuapio, Carlos Bueno, Mauricio Pacio, Avelino Cortés, and Hector Juárez. "Photoluminescence of Hybrid Structure Base in ZnO@SiO2 Core-Shell Nanoparticles inside Porous Silicon." Solid State Phenomena 286 (January 2019): 40–48. http://dx.doi.org/10.4028/www.scientific.net/ssp.286.40.

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In this work, core-shell ZnO@SiO2nanoparticles (NPs) were infiltrated into a macro/meso-porous silicon (PS) structure, to study its luminescent properties. The core-shell ZnO@SiO2NPs were obtained by colloidal synthesis. The core-shell ZnO@SiO2NP was 5 nm in diameter. The macro/meso-PS structure was made in two steps: we obtained the macroporous silicon (macro-PS) layer fist and the mesoporous silicon (meso-PS) layer second. This process was conducted using different electrolyte solutions, and the change of electrolyte led to a decrease in the special charge region over the wall macro-PS layer; this allowed the building of the meso-PS layers on the walls and the bottom of the macro-PS layer. The SEM results show the cross-section of the macro/meso-PS structure with and without core-shell ZnO@SiO2NPs. These SEM images show that the core-shell ZnO@SiO2NPs that infiltrated into macro/meso-PS structure were more efficiently bonded over all the porous walls. The core-shell ZnO@SiO2PL interacted with the macro/meso-PS structure, modifying its PL intensity and controlling a shift toward a lower wavelength.
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40

Ma, Tian Yi, Tie Zhen Ren, and Zhong Yong Yuan. "Synthesis and Photocatalytic Performance of Hierarchical Porous Titanium Phosphonate Hybrid Materials." Advanced Materials Research 132 (August 2010): 87–95. http://dx.doi.org/10.4028/www.scientific.net/amr.132.87.

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A hierarchical meso-/macroporous titanium phosphonate (TPPH) hybrid material was prepared via a simple surfactant-assisted process with the use of the precursor tetrabutyl titanate and 1-hydroxy ethylidene-1,1-diphosphonic acid. The prepared hybrid TPPH presented amorphous phase, exhibiting a hierarchical macroporous structure composed of mesopores with a pore size of 2.0 nm. The BET surface area is 256 m2/g. The hydroxyethylidene-bridged organophosphonate groups were homogeneously incorporated in the network of the hierarchical porous solid, as revealed by FT-IR, MAS NMR, XPS, and TGA measurements. The optical properties and photocatalytic activity of the hierarchical TPPH material were investigated in comparison with those of hierarchical porous titanium phosphate and pure mesoporous titania materials, showing superiority of the inorganic-organic hybrid framework, suggesting promising photocatalysts for wastewater cleanup.
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41

Tang, Qiong, Heqin Li, Min Zuo, Jing Zhang, Yiqin Huang, Peiwen Bai, Jiaqi Xu, and Kuan Zhou. "Optimized Assembly of Micro-/Meso-/Macroporous Carbon for Li–S Batteries." Nano 12, no. 02 (February 2017): 1750021. http://dx.doi.org/10.1142/s1793292017500217.

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In order to explore the effect of hierarchical porous carbon on the performances of Li–S batteries, we synthesized three kinds of micro-/meso-/macroporous carbon materials with different pore properties by facile hard-template method. Different from the majority of reports on porous carbon ensuing large specific surface area (SSA) and total pore volume, it was found that in the case of identically high sulfur content, the pore size distribution substantially influences the performances of Li–S batteries rather than the SSA and total pore volume. Furthermore, in the assembly of micro-/meso-/macropores, the micropore volume ratio to the total pore volume is dominant to the capabilities of batteries. Among the samples, the porous carbon carbonized with the precursor of sucrose at 950[Formula: see text]C presents the highest initial discharge specific capacity of 1327[Formula: see text]mAh/g and retention of 630[Formula: see text]mAh/g over 100 cycles at 0.2C rate along with the best rate capability. This sample possesses the largest micropore volume ratio of 47.54% but a medium SSA of 1217[Formula: see text]m2/g and inferior total pore volume of 0.54[Formula: see text]cm3/g. The abundant micropores effectively improve the conductivity of dispersed sulfur particles, inhibit the loss of sulfur series and enable the cathode to exhibit superior electrochemical performances.
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42

Lang, Xueqin, Haiyang Mo, Xiaoying Hu, and Hongwei Tian. "Supercapacitor performance of perovskite La1−xSrxMnO3." Dalton Trans. 46, no. 40 (2017): 13720–30. http://dx.doi.org/10.1039/c7dt03134c.

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Sr-doped perovskite manganite La1−xSrxMnO3 materials, which are composed of nanoparticles, possess a meso-scale porous structure with superior electrochemical properties under the mechanism of oxygen intercalation.
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43

Ottaviani, Maria Francesca, and Roberto Mazzeo. "EPR characterization of graphitized and activated micro- and meso-porous carbons." Microporous and Mesoporous Materials 141, no. 1-3 (May 2011): 61–68. http://dx.doi.org/10.1016/j.micromeso.2010.10.049.

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44

Yan, Xi, Fang Liu, Guiqin Mu, Zhiguo Zhou, Yan Xie, Long Li, Yangyang Yang, and Xinzhe Wang. "Adsorption of toluene vapours on micro–meso hierarchical porous carbon." Micro & Nano Letters 13, no. 5 (May 2018): 641–45. http://dx.doi.org/10.1049/mnl.2017.0760.

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45

Shi, Zhu, Wenyao Peng, Chaoqun Xiang, Liang Li, and Qibin Xie. "Neural Network Aided Homogenization Approach for Predicting Effective Thermal Conductivity of Composite Construction Materials." Materials 16, no. 9 (April 23, 2023): 3322. http://dx.doi.org/10.3390/ma16093322.

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Thermal conductivity is a fundamental material parameter involved in various infrastructure design guides around the world. This paper developed an innovative neural network (NN) aided homogenization approach for predicting the effective thermal conductivity of various composite construction materials. The 2-D meso-structures of dense graded asphalt mixture, porous asphalt mixture, and cement concrete were generated and divided into 2n × 2n square elements with specific thermal conductivity values. A two-layer feed-forward neural network with sigmoid hidden neurons and linear output neurons was built to predict the effective thermal conductivity of the 2 × 2 block. The Levenberg-Marquardt backpropagation algorithm was used to train the network. By repeatedly using the neural network, the effective thermal conductivities of 2-D meso-structures were calculated. The accuracy of the above NN aided homogenization approach was validated with experiment, and various factors affecting the effective thermal conductivity were analyzed. The analysis results show that the accuracy of the NN aided approach is acceptable with relative errors of 1.92~4.34% for the dense graded asphalt mixture, 1.10~6.85% for the porous asphalt mixture, and 1.13~3.14% for the cement concrete. The relative errors for all the materials are lower than 5% when the heterogeneous structures are divided into 512 × 512 elements. Ignoring the actual material meso-structures may lead to significant errors (134.01%) in predicting the effective thermal conductivity of materials with high heterogeneity such as porous asphalt mixture. While proper simplification is acceptable for dense construction composite materials. The effective thermal conductivity of composite cement-asphalt mixtures increases with higher saturation of grouted material. However, the improvement effect of the high-conductive cement paste on the composite cement-asphalt mixtures could be significantly reduced when the cement paste concentrates at the bottom of the mixture. Cracked aggregates and segregation of material components tend to decrease the effective thermal conductivity of construction materials. The NN aided homogenization approach presented in this paper is useful for selecting the effective thermal conductivity of construction materials.
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46

Kim, Ji Sook, Sun Hwa Lee, and Dong Wook Shin. "Fabrication of Hybrid Solid Electrolyte by LiPF6 Liquid Electrolyte Infiltration into Nano-Porous Na2O-SiO2-B2O3 Glass Membrane." Solid State Phenomena 124-126 (June 2007): 1027–30. http://dx.doi.org/10.4028/www.scientific.net/ssp.124-126.1027.

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To improve ion mobility in solid inorganic electrolyte for lithium ion battery, the hybrid electrolytes were developed in the form of the organic-inorganic meso-scale hybridization by the infiltration of liquid electrolyte into meso-porous inorganic glass membrane. Glass electrolyte membranes with nanopores were prepared by spinodal decomposition and subsequent acid leaching. The most suitable glass electrolyte membranes could be fabricated from the 7.5Na2O-46.25B2O3 -46.25SiO2 (mol%). The effect of leaching temperature, leaching time and leaching acids on the preparation of the membranes were investigated. The microstructure of the cross-section of 7.5Na2O-46.25B2O3-46.25SiO2 glass electrolytes were examined with a scanning electron microscope. Then, liquid electrolyte was infiltrated by dipping method into etched glasses electrolyte. Full cells were fabricated by LiCoO2 for cathode materials and MCMB for anode materials. Conductivity and charge-discharge test of the porous glass electrolyte membrane was measured.
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47

Deville, Sylvain, Eduardo Saiz, Ravi K. Nalla, and Antoni P. Tomsia. "Strong Biomimetic Hydroxyapatite Scaffolds." Advances in Science and Technology 49 (October 2006): 148–52. http://dx.doi.org/10.4028/www.scientific.net/ast.49.148.

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Despite extensive efforts in the development of fabrication methods to prepare porous ceramic scaffolds for osseous tissue regeneration, all porous materials have a fundamental limitation- the inherent lack of strength associated with porosity. Shells (nacre), tooth and bone are frequently used as examples for how nature achieves strong and tough materials made out of weak components. So, the unresolved engineering dilemma is how to create a scaffold that is both porous and strong. The objective of this study was to mimic the architecture of natural materials in order to create a new generation of strong hydroxyapatite-based porous scaffolds. The porous inorganic scaffolds were fabricated by the controlled freezing of water-based hydroxyapatite (HA) slurries. The scaffolds obtained by this process have a lamellar architecture that exhibits similarities with the meso- and micro- structure of the inorganic component of nacre. Compressive strengths of 20 MPa were measured for lamellar scaffolds with densities of 32%, significantly better than for the HA with random porosity. In addition, the lamellar materials exhibit gradual fracture unlike conventional porous HA scaffolds. These biomimetic scaffolds could be the basis for a new generation of porous and composite biomaterials.
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KIM, KYUNG-IL, JUN-YOUNG LEE, JOON-HYUN AN, and JUNG-HYUN KIM. "MORPHOLOGY AND CHARACTERIZATION OF POLYIMIDE/POLYSILSESQUIOXANE HYBRID FILMS WITH MESO/MACRO DOUBLE POROUS STRUCTURE." Journal of Nonlinear Optical Physics & Materials 13, no. 03n04 (December 2004): 541–45. http://dx.doi.org/10.1142/s0218863504002237.

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Supercritical CO 2 ( ScCO 2) can dissolve organic materials easily just by changing temperature and pressure. This property of ScCO 2 can be applied to extract some ScCO 2-philic organic molecules from matrix material. The ScCO 2 was used to generate the meso/macro double porous structure of polyimide/polysilsesquioxane (PI/PSSQ) hybrid film. The morphology of the porous structure was measured by scanning electron microscope (SEM). Here, we demonstrate that the ScCO 2 could penetrate into the hybrid thin film and take away the small molecules, which are the by-product ( CO 2) from the imidization reaction of the PI segment and the solvent remained in the PSSQ segment by sol-gel process.
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Numata, Takayuki, Yukitoshi Otani, and Norihiro Umeda. "Meso-porous membrane of noble metal for surface plasmon resonance gas sensors." Journal of Materials Science 42, no. 3 (February 2007): 1050–53. http://dx.doi.org/10.1007/s10853-006-1285-z.

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50

Hao, Enchao, Wei Liu, Shuang Liu, Yuan Zhang, Huanlei Wang, Shougang Chen, Fengli Cheng, Shuping Zhao, and Hongzhan Yang. "Rich sulfur doped porous carbon materials derived from ginkgo leaves for multiple electrochemical energy storage devices." Journal of Materials Chemistry A 5, no. 5 (2017): 2204–14. http://dx.doi.org/10.1039/c6ta08169j.

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Based on the unique multilayered structure of ginkgo leaves, interconnected carbon nanosheets with rich micro/meso pores have been fabricated, showing excellent electrochemical performance in multiple energy storage devices.
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