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Author: Grafiati

Published: 26 July 2024

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1

Ursueguía, David, Eva Díaz, and Salvador Ordóñez. "Densification-Induced Structure Changes in Basolite MOFs: Effect on Low-Pressure CH4 Adsorption." Nanomaterials 10, no. 6 (June 1, 2020): 1089. http://dx.doi.org/10.3390/nano10061089.

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Metal-organic frameworks’ (MOFs) adsorption potential is significantly reduced by turning the original powder into pellets or granules, a mandatory step for their use at industrial scale. Pelletization is commonly performed by mechanical compression, which often induces the amorphization or pressure-induced phase transformations. The objective of this work is the rigorous study of the impact of mechanical pressure (55.9, 111.8 and 186.3 MPa) onto three commercial materials (Basolite C300, F300 and A100). Phase transformations were determined by powder X-ray diffraction analysis, whereas morphological changes were followed by nitrogen physisorption. Methane adsorption was studied in an atmospheric fixed bed. Significant crystallinity losses were observed, even at low applied pressures (up to 69.9% for Basolite C300), whereas a structural change occurred to Basolite A100 from orthorhombic to monoclinic phases, with a high cell volume reduction (13.7%). Consequently, adsorption capacities for both methane and nitrogen were largely reduced (up to 53.6% for Basolite C300), being related to morphological changes (surface area losses). Likewise, the high concentration of metallic active centers (Basolite C300), the structural breathing (Basolite A100) and the mesopore-induced formation (Basolite F300) smooth the dramatic loss of capacity of these materials.

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2

Fdez-Sanromán, Antía, Marta Pazos, and Angeles Sanroman. "Peroxymonosulphate Activation by Basolite® F-300 for Escherichia coli Disinfection and Antipyrine Degradation." International Journal of Environmental Research and Public Health 19, no. 11 (June 3, 2022): 6852. http://dx.doi.org/10.3390/ijerph19116852.

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In this study, the removal of persistent emerging and dangerous pollutants (pharmaceuticals and pathogens) in synthetic wastewater was evaluated by the application of heterogeneous Advanced Oxidation Processes. To do that, a Metal-Organic Framework (MOF), Basolite® F-300 was selected as a catalyst and combined with peroxymonosulfate (PMS) as oxidants in order to generate sulphate radicals. Several key parameters such as the PMS and Basolite® F-300 concentration were evaluated and optimized using a Central Composite Experimental Design for response surface methodology for the inactivation of Escherichia coli. The assessment of the degradation of an analgesic and antipyretic pharmaceutical, antipyrine, revealed that is necessary to increase the concentration of PMS and amount of Basolite® F-300, in order to diminish the treatment time. Finally, the PMS-Basolite® F-300 system can be used for at least four cycles without a reduction in its ability to disinfect and degrade persistent emerging and dangerous pollutants such as pharmaceuticals and pathogens.

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3

Kumar, Pawan, Parveen Kumar, Akash Deep, and Lalit M. Bharadwaj. "Doped Zinc-Organic Framework for Sensing of Pesticide." Advanced Materials Research 488-489 (March 2012): 1543–46. http://dx.doi.org/10.4028/www.scientific.net/amr.488-489.1543.

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Basolite Z-1200 is one of the most popular commercially available MOF for the gas storage applications. Pristine Basolite Z-1200 is an electrically non-conducting material. This research focuses to tap the potential of Basolite Z-1200’s unique porous structure for the adsorption and sensing of a pesticide. For this, the above said MOF has been treated with mineral acids (HCl) to make it electrically active. The protonated MOF solutions have been used to form conducting thin films on glass slides. Electrical measurements have indicated that the proton doping reduces the overall resistance of the MOF. Prepared thin films have been used to sense Mecoprop some in sample solutions. Conducting MOF thin films may find applications in environmental sensors, pre-concentration, solid phase extraction, electronic devices etc.

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4

Hu, Xiaoshi, Xiaobing Lou, Chao Li, Yanqun Ning, Yuxing Liao, Qun Chen, Eugène S. Mananga, Ming Shen, and Bingwen Hu. "Facile synthesis of the Basolite F300-like nanoscale Fe-BTC framework and its lithium storage properties." RSC Advances 6, no. 115 (2016): 114483–90. http://dx.doi.org/10.1039/c6ra22738d.

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5

Grinnell, Cole, and Alexander Samokhvalov. "Exploring the electronic structure of aluminum metal–organic framework Basolite A100: solid-state synchronous fluorescence spectroscopy reveals new charge excitation/relaxation pathways." Physical Chemistry Chemical Physics 20, no. 42 (2018): 26947–56. http://dx.doi.org/10.1039/c8cp04988b.

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6

Jia, Chunmei, Bart Bueken, Francisco G. Cirujano, Kevin M. Van Geem, and Dirk De Vos. "Phenolics isolation from bio-oil using the metal–organic framework MIL-53(Al) as a highly selective adsorbent." Chemical Communications 55, no. 44 (2019): 6245–48. http://dx.doi.org/10.1039/c9cc02177a.

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7

Yati, Indri, Muhammad Ridwan, Franco Padella, and Marzia Pentimalli. "The Effect of Solvent on the Characteristics of FeBTC MOF as a Potential Heterogenous Catalyst Prepared via Green Mechanochemical Process." Bulletin of Chemical Reaction Engineering & Catalysis 19, no. 1 (February 8, 2024): 118–25. http://dx.doi.org/10.9767/bcrec.20115.

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In this study, the synthesis of FeBTC (BTC = 1,3,5-benzenetricarboxylate) also known as MIL-100 (Fe) metal organic framework (MOF) has been carried out successfully using green mechanochemical method (neat grinding and liquid assisted grinding). The effect of solvent used in the synthesis was investigated for the first time to elucidate the physicochemical properties of FeBTC including crystal structure, thermal stability, pore size and specific surface area. The physicochemical properties of all FeBTC obtained in this study were compared to commercial FeBTC (Basolite F-300), characterized using powder X-Ray Diffraction (XRD), Thermogravimetric Analysis (TGA) and nitrogen physisorption isotherms. All Fe-BTC MOF synthesized in this study showed improved textural properties compared to commercial Basolite F-300 such as higher crystallinity, higher surface area and larger pore size. It was found that the best synthesis method was by using the mixture of ethanol and water with equal volume ratio as solvent. The highest BET surface area of FeBTC synthesized using this method was 972 m2/g for FeBTC-EtOH/H2O. This value is 2.3 times higher than the surface area of commercial Basolite F-300 (418 m2/g). FeBTC with higher surface area is expected to have higher catalytic activity which makes this FeBTC an excellent candidate as a heterogenous catalyst for many reactions such as aldol condensation or esterification reaction. Copyright © 2024 by Authors, Published by BCREC Publishing Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

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8

Fisher, Taylor Mackenzie, Alexsandro J. dos Santos, and Sergi Garcia-Segura. "Metal–Organic Framework Fe-BTC as Heterogeneous Catalyst for Electro-Fenton Treatment of Tetracycline." Catalysts 14, no. 5 (May 10, 2024): 314. http://dx.doi.org/10.3390/catal14050314.

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This study explores the use of the iron-containing metal–organic framework (MOF), Basolite®F300, as a heterogeneous catalyst for electrochemically-driven Fenton processes. Electrochemical advanced oxidation processes (EAOPs) have shown promise on the abatement of recalcitrant organic pollutants such as pharmaceuticals. Tetracyclines (TC) are a frequently used class of antibiotics that are now polluting surface water and groundwater sources worldwide. Acknowledging the fast capability of EAOPs to treat persistent pharmaceutical pollutants, we propose an electrochemical Fenton treatment process that is catalyzed by the use of a commercially available MOF material to degrade TC. The efficiency of H2O2 generation in the IrO2/carbon felt setup is highlighted. However, electrochemical oxidation with H2O2 production (ECO-H2O2) alone is not enough to achieve complete TC removal, attributed to the formation of weak oxidant species. Incorporating Basolite®F300 in the heterogeneous electro-Fenton (HEF) process results in complete TC removal within 40 min, showcasing its efficacy. Additionally, this study explores the effect of varying MOF concentrations, indicating optimal removal rates at 100 mg L−1 due to a balance of kinetics and limitation of active sites of the catalysts. Furthermore, the impact of the applied current on TC removal is investigated, revealing a proportional relationship between current and removal rates. The analysis of energy efficiency emphasizes 50 mA as the optimal current, however, balancing removal efficiency with electrical energy consumption. This work highlights the potential of Basolite®F300 as an effective catalyst in the HEF process for pollutant abatement, providing valuable insights into optimizing electrified water treatment applications with MOF nanomaterials to treat organic pollutants.

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9

Furasova, A. D., G. Hix, S. V. Makarov, and A. Di Carlo. "Mesoporous perovskite solar cells with Al- and Zn-based metal-organic frameworks." Journal of Physics: Conference Series 2015, no. 1 (November 1, 2021): 012042. http://dx.doi.org/10.1088/1742-6596/2015/1/012042.

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Abstract The improvement of lead halide perovskites solar cells (PSC) by hydrophobic metal-organic frameworks (MOF) is one of the promising tools for modern photovoltaic technology to achieve stable and efficient thin-film devices. To show the MOF applicability for PSC, we incorporate two types of MOF: NH2-MIL-53(Al) and basolite Z1200 in n-i-p mesoporous MAPbI3 based solar cells that can add 2.2% efficiency by increasing main photovoltaic parameters. The simplicity of the proposed MOF’s integration allows to use and adopt this approach to incorporate other frameworks for thin-film perovskite devices.

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10

Ursueguía, David, Eva Díaz, and Salvador Ordóñez. "Adsorption of methane and nitrogen on Basolite MOFs: Equilibrium and kinetic studies." Microporous and Mesoporous Materials 298 (May 2020): 110048. http://dx.doi.org/10.1016/j.micromeso.2020.110048.

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11

Blanco-Brieva, G., J. M. Campos-Martin, S. M. Al-Zahrani, and J. L. G. Fierro. "Efficient solvent regeneration of Basolite C300 used in the liquid-phase adsorption of dibenzothiophene." Fuel 113 (November 2013): 216–20. http://dx.doi.org/10.1016/j.fuel.2013.05.065.

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12

Vargas-Bustamante, Jaquebet, Pedro Martínez-Ortiz, Daniel Alvarado-Alvarado, Ulises Torres-Herrera, and Jorge Balmaseda. "Experimental Setup and Graphical User Interface for Zero-Length Column Chromatography." Applied Sciences 12, no. 13 (July 1, 2022): 6694. http://dx.doi.org/10.3390/app12136694.

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This work describes the design and implementation of a Zero-Length Column system to measure: diffusion coefficients, adsorption isotherm parameters of pure components and mixtures. In addition, a graphical user interface (GUI) was developed in LabVIEW for the semi-automatic operation of the system. The system is novel because it integrates all the aforementioned functionalities without using mass spectrometry. Two adsorbents, zeolite 5A and Basolite® C300 (Copper benzene-1,3,5-tricarboxylate) and two adsorbates methane and ethane were used to perform the validation of adsorption and diffusion experiments. The Henry constants and diffusion coefficients obtained reproduce those previously reported. The combination of the experimental setup and the GUI significantly reduce the amount of sample and measurement time needed in the characterization of the molecular sieves by conventional volumetric and gravimetric systems. The proposed system is relatively inexpensive, robust, easy to build, and capable of reproducing the results of other techniques.

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13

Deniz, Erhan, Ferdi Karadas, Hasmukh A. Patel, Santiago Aparicio, Cafer T. Yavuz, and Mert Atilhan. "A combined computational and experimental study of high pressure and supercritical CO2 adsorption on Basolite MOFs." Microporous and Mesoporous Materials 175 (July 2013): 34–42. http://dx.doi.org/10.1016/j.micromeso.2013.03.015.

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14

Primbs, Mathias, Elisabeth Hornberger, Pierre Schroeer, Sören Selve, and Peter Strasser. "Fe-N-C Oxygen Reduction Catalysts Via Chemical Vapor Deposition in Fluidized Bed Reactor." ECS Meeting Abstracts MA2023-02, no. 40 (December 22, 2023): 1941. http://dx.doi.org/10.1149/ma2023-02401941mtgabs.

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Metal nitrogen carbon catalysts (MNC) are an attractive substitute for platinum-based catalysts in the oxygen reduction reaction (ORR) in PEM fuel cells. However, state-of-the-art MNC catalysts still suffer from low activity and instability. Li et al. [1] demonstrated the use of zinc imidazolate frameworks (ZIF-8) in chemical vapor deposition (CVD) to form active sites without unwanted particle formation or additional treatment steps. In this method, gaseous iron chloride exchanges the zinc in the precatalyst to form active sites. In this work, we introduce a vertical fluidized bed reactor (FBR) for high-scale synthesis of FeNC via CVD, allowing for uniform dispersion of the precatalyst and better zinc-iron exchange. Furthermore, we investigated the influence of differently sized ZIF-8 on the CVD and the formation of the FeNC catalyst. The final catalysts were characterized for their electrochemical activity in a rotating ring disc setup, their site density via CO-chemisorption, and their respective turnover frequency. The physicochemical characterization includes the analysis of surface area and pore structure via nitrogen physisorption, SEM, and TEM, as well as surface structure and compositional analysis via elemental analysis, ICP-OES, and XPS. The exchange of Zn was in the range of 90%, resulting in an iron content of 3.8 wt% with only the formation of desired Fe-Nx active sites. STEM-EDX imaging shows an even distribution of iron and nitrogen in the catalyst, with mean particle sizes of 110 nm. In rotating disc electrode experiments with 0.5 M sulfuric acid, mass activities of 0.23 A/g at 0.9 V vs RHE were achieved. Commercially nano-scaled ZIF-8 with mean particle sizes of 500 nm, synthesized particles with mean sizes of 110 nm were tested, compared to the commercial ZIF-8 Basolite Z1200 with mean particle sizes of 4.9 µm. We could show improved activity in RRDE of the nano-scaled ZIF-8 materials compared to the macro-scaled Basolite. Applying this highly scalable synthesis method for MNC catalysts could be a viable way to achieve high-performance catalysts for ORR. [1] Li Jiao, Jingkun Li, Lynne Larochelle Richard, Qiang Sun, Thomas Stracensky, et al.. Chemical vapour deposition of Fe–N–C oxygen reduction catalysts with full utilization of dense Fe–N4 sites. Nature Materials, 2021, 20, pp.1385-1391.

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15

Godino-Ojer, Marina, Mariya Shamzhy, Jiři Čejka, and Elena Pérez-Mayoral. "Basolites: A type of Metal Organic Frameworks highly efficient in the one-pot synthesis of quinoxalines from α-hydroxy ketones under aerobic conditions." Catalysis Today 345 (April 2020): 258–66. http://dx.doi.org/10.1016/j.cattod.2019.08.002.

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16

Sanchez-Sanchez, Manuel, Iñigo de Asua, Daniel Ruano, and Kenya Diaz. "Direct Synthesis, Structural Features, and Enhanced Catalytic Activity of the Basolite F300-like Semiamorphous Fe-BTC Framework." Crystal Growth & Design 15, no. 9 (August 18, 2015): 4498–506. http://dx.doi.org/10.1021/acs.cgd.5b00755.

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17

Drenchev, Nikola, Elena Ivanova, Mihail Mihaylov, and Konstantin Hadjiivanov. "CO as an IR probe molecule for characterization of copper ions in a basolite C300 MOF sample." Physical Chemistry Chemical Physics 12, no. 24 (2010): 6423. http://dx.doi.org/10.1039/c000949k.

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18

Sulistyo, Hary, Indra Perdana, Fatimah Tresna Pratiwi, and Indah Hartati. "Kinetics and Thermodynamics Studies of Ketalization of Glycerol and Acetone in the Presence of Basolite F300 as Catalyst." IOP Conference Series: Materials Science and Engineering 742 (March 10, 2020): 012007. http://dx.doi.org/10.1088/1757-899x/742/1/012007.

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19

Lara-lbeas, Irene, Alberto Rodríguez-Cuevas, Christina Andrikopoulou, Vincent Person, Lucien Baldas, Stéphane Colin, and Stéphane Le Calvé. "Sub-ppb Level Detection of BTEX Gaseous Mixtures with a Compact Prototype GC Equipped with a Preconcentration Unit." Micromachines 10, no. 3 (March 13, 2019): 187. http://dx.doi.org/10.3390/mi10030187.

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In this work, a compact gas chromatograph prototype for near real-time benzene, toluene, ethylbenzene and xylenes (BTEX) detection at sub-ppb levels has been developed. The system is composed of an aluminium preconcentrator (PC) filled with Basolite C300, a 20 m long Rxi-624 capillary column and a photoionization detector. The performance of the device has been evaluated in terms of adsorption capacity, linearity and sensitivity. Initially, PC breakthrough time for an equimolar 1 ppm BTEX mixture has been determined showing a remarkable capacity of the adsorbent to quantitatively trap BTEX even at high concentrations. Then, a highly linear relationship between sample volume and peak area has been obtained for all compounds by injecting 100-ppb samples with volumes ranging from 5–80 mL. Linear plots were also observed when calibration was conducted in the range 0–100 ppb using a 20 mL sampling volume implying a total analysis time of 19 min. Corresponding detection limits of 0.20, 0.26, 0.49, 0.80 and 1.70 ppb have been determined for benzene, toluene, ethylbenzene, m/p-xylenes and o-xylene, respectively. These experimental results highlight the potential applications of our device to monitor indoor or outdoor air quality.

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20

Demir, Muslum, Michael L. McKee, and Alexander Samokhvalov. "Interactions of thiophenes with C300 Basolite MOF in solution by the temperature-programmed adsorption and desorption, spectroscopy and simulations." Adsorption 20, no. 7 (July 5, 2014): 829–42. http://dx.doi.org/10.1007/s10450-014-9625-9.

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21

Grinnell, Cole, and Alexander Samokhvalov. "The solid-state synchronous vs. conventional fluorescence spectroscopy and complementary methods to study the interactions of aluminum metal-organic framework Basolite A100 with dimethyl sulfoxide." Journal of Luminescence 210 (June 2019): 485–92. http://dx.doi.org/10.1016/j.jlumin.2019.01.062.

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22

Möllmer, Jens, Marcus Lange, Andreas Möller, Christin Patzschke, Karolin Stein, Daniel Lässig, Jörg Lincke, Roger Gläser, Harald Krautscheid, and Reiner Staudt. "Pure and mixed gas adsorption of CH4 and N2 on the metal–organic framework Basolite® A100 and a novel copper-based 1,2,4-triazolyl isophthalate MOF." Journal of Materials Chemistry 22, no. 20 (2012): 10274. http://dx.doi.org/10.1039/c2jm15734a.

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23

González-Sálamo, Javier, Miguel Ángel González-Curbelo, Javier Hernández-Borges, and Miguel Ángel Rodríguez-Delgado. "Use of Basolite® F300 metal-organic framework for the dispersive solid-phase extraction of phthalic acid esters from water samples prior to LC-MS determination." Talanta 195 (April 2019): 236–44. http://dx.doi.org/10.1016/j.talanta.2018.11.049.

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24

Dhakshinamoorthy, Amarajothi, Mercedes Alvaro, Patricia Horcajada, Emma Gibson, Muthusamy Vishnuvarthan, Alexandre Vimont, Jean-Marc Grenèche, Christian Serre, Marco Daturi, and Hermenegildo Garcia. "Comparison of Porous Iron Trimesates Basolite F300 and MIL-100(Fe) As Heterogeneous Catalysts for Lewis Acid and Oxidation Reactions: Roles of Structural Defects and Stability." ACS Catalysis 2, no. 10 (August 30, 2012): 2060–65. http://dx.doi.org/10.1021/cs300345b.

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25

Bikiaris, Nikolaos, Nina Ainali, Evi Christodoulou, Margaritis Kostoglou, Thomas Kehagias, Emilia Papasouli, Emmanuel Koukaras, and Stavroula Nanaki. "Dissolution Enhancement and Controlled Release of Paclitaxel Drug via a Hybrid Nanocarrier Based on mPEG-PCL Amphiphilic Copolymer and Fe-BTC Porous Metal-Organic Framework." Nanomaterials 10, no. 12 (December 11, 2020): 2490. http://dx.doi.org/10.3390/nano10122490.

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In the present work, the porous metal-organic framework (MOF) Basolite®F300 (Fe-BTC) was tested as a potential drug-releasing depot to enhance the solubility of the anticancer drug paclitaxel (PTX) and to prepare controlled release formulations after its encapsulation in amphiphilic methoxy poly(ethylene glycol)-poly(ε-caprolactone) (mPEG-PCL) nanoparticles. Investigation revealed that drug adsorption in Fe-BTC reached approximately 40%, a relatively high level, and also led to an overall drug amorphization as confirmed by differential scanning calorimetry (DSC) and X-ray diffraction (XRD). The dissolution rate of PTX-loaded MOF was substantially enhanced achieving a complete (100%) release within four days, while the neat drug only reached a 13% maximum rate (3–4 days). This PTX-Fe-BTC nanocomposite was further encapsulated into a mPEG-PCL matrix, a typical aliphatic amphiphilic copolyester synthesized in our lab, whose biocompatibility was validated by in vitro cytotoxicity tests toward human umbilical vein endothelial cells (HUVEC). Encapsulation was performed according to the solid-in-oil-in-water emulsion/solvent evaporation technique, resulting in nanoparticles of about 143 nm, slightly larger of those prepared without the pre-adsorption of PTX on Fe-BTC (138 nm, respectively). Transmission electron microscopy (TEM) imaging revealed that spherical nanoparticles with embedded PTX-loaded Fe-BTC nanoparticles were indeed fabricated, with sizes ranging from 80 to 150 nm. Regions of the composite Fe-BTC-PTX system in the infrared (IR) spectrum are identified as signatures of the drug-MOF interaction. The dissolution profiles of all nanoparticles showed an initial burst release, attributed to the drug amount located at the nanoparticles surface or close to it, followed by a steadily and controlled release. This is corroborated by computational analysis that reveals that PTX attaches effectively to Fe-BTC building blocks, but its relatively large size limits diffusion through crystalline regions of Fe-BTC. The dissolution behaviour can be described through a bimodal diffusivity model. The nanoparticles studied could serve as potential chemotherapeutic candidates for PTX delivery.

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26

Sapnik, Adam F., Irene Bechis, Sean M. Collins, Duncan N. Johnstone, Giorgio Divitini, Andrew J. Smith, Philip A. Chater, et al. "Mixed hierarchical local structure in a disordered metal–organic framework." Nature Communications 12, no. 1 (April 6, 2021). http://dx.doi.org/10.1038/s41467-021-22218-9.

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AbstractAmorphous metal–organic frameworks (MOFs) are an emerging class of materials. However, their structural characterisation represents a significant challenge. Fe-BTC, and the commercial equivalent Basolite® F300, are MOFs with incredibly diverse catalytic ability, yet their disordered structures remain poorly understood. Here, we use advanced electron microscopy to identify a nanocomposite structure of Fe-BTC where nanocrystalline domains are embedded within an amorphous matrix, whilst synchrotron total scattering measurements reveal the extent of local atomic order within Fe-BTC. We use a polymerisation-based algorithm to generate an atomistic structure for Fe-BTC, the first example of this methodology applied to the amorphous MOF field outside the well-studied zeolitic imidazolate framework family. This demonstrates the applicability of this computational approach towards the modelling of other amorphous MOF systems with potential generality towards all MOF chemistries and connectivities. We find that the structures of Fe-BTC and Basolite® F300 can be represented by models containing a mixture of short- and medium-range order with a greater proportion of medium-range order in Basolite® F300 than in Fe-BTC. We conclude by discussing how our approach may allow for high-throughput computational discovery of functional, amorphous MOFs.

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27

Chuvikov, Sergey V., and Semen N. Klyamkin. "Assessment of high‐pressure hydrogen storage performance of Basolite metal‐organic frameworks." International Journal of Energy Research, September 11, 2022. http://dx.doi.org/10.1002/er.8747.

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28

Rojas-Luna, Raúl, Juan Amaro-Gahete, Dolores G. Gil-Gavilán, Miguel Castillo-Rodríguez, César Jiménez-Sanchidrían, José Rafael Ruiz, Dolores Esquivel, and Francisco José Romero-Salguero. "Visible-light-harvesting basolite-A520 metal organic framework for photocatalytic hydrogen evolution." Microporous and Mesoporous Materials, March 2023, 112565. http://dx.doi.org/10.1016/j.micromeso.2023.112565.

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29

Ursueguía, David, Eva Díaz, and Salvador Ordóñez. "Effect of Water and Carbon Dioxide on the Performance of Basolite Metal–Organic Frameworks for Methane Adsorption." Energy & Fuels, September 26, 2023. http://dx.doi.org/10.1021/acs.energyfuels.3c02393.

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30

Nagabooshanam, Shalini, Souradeep Roy, Ashish Mathur, Irani Mukherjee, Satheesh Krishnamurthy, and Lalit M. Bharadwaj. "Electrochemical micro analytical device interfaced with portable potentiostat for rapid detection of chlorpyrifos using acetylcholinesterase conjugated metal organic framework using Internet of things." Scientific Reports 9, no. 1 (December 2019). http://dx.doi.org/10.1038/s41598-019-56510-y.

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AbstractAn Electrochemical micro Analytical Device (EµAD) was fabricated for sensitive detection of organophosphate pesticide chlorpyrifos in the food chain. Gold microelectrode (µE) modified with Zinc based Metal Organic Framework (MOF-Basolite Z1200) and Acetylcholinesterase (AChE) enzyme served as an excellent electro-analytical transducer for the detection of chlorpyrifos. Electrochemical techniques such as Cyclic Voltammetry (CV), Electrochemical Impedance Spectroscopy (EIS) and Differential Pulse Voltammetry (DPV) were performed for electrochemical analysis of the developed EµAD. The sensor needs only 2 µL of the analyte and it was tested within the linear range of 10 to 100 ng/L. The developed EµAD’s limit of detection (LoD) and sensitivity is 6 ng/L and 0.598 µ A/ng L−1/mm2 respectively. The applicability of the device for the detection of chlorpyrifos from the real vegetable sample was also tested within the range specified. The fabricated sensor showed good stability with a shelf-life of 20 days. The EµAD’s response time is of 50 s, including an incubation time of 20 s. The developed EµAD was also integrated with commercially available low-cost, handheld potentiostat (k-Stat) using Bluetooth and the results were comparable with a standard electrochemical workstation.

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31

Eid, Ahmed, Mohammad Aminur Rahman, and Hind A. Al-Abadleh. "Mechanistic studies on the conversion of NO gas on urea-iron and copper metal organic frameworks at low temperature conditions: in situ infrared spectroscopy and Monte Carlo investigations." Canadian Journal of Chemistry, July 14, 2021. http://dx.doi.org/10.1139/cjc-2021-0130.

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Nitrogen oxides (NOx) emissions from high temperature combustion processes under fuel-lean conditions continue to be a challenge for the energy industry. Selective catalytic reduction (SCR) has been possible with metal oxides and zeolites. There is still the need to identify catalytic materials that are efficient in reducing NOx to environmentally benign nitrogen gas at temperatures lower than 200°C. Metal-organic frameworks (MOFs) emerged as a class of highly porous materials with unique physical and chemical properties. This study is motivated by the lack of systematic investigations on SCR using MOFs under industrially-relevant conditions. Here, we investigate the extent of NO conversion with two commercially-available MOFs; Basolite F300 (Fe-BTC) and HKUST-1 (Cu-BTC), mixed with solid urea as a source for the reductant, ammonia gas. For comparison, experiments were also conducted using cobalt ferrite (CoFe2O4) as a non-porous counterpart to relate its reactivity to those obtained from MOFs. Fourier-transform infrared spectroscopy (FTIR) was utilized to identify gas and surface species the temperature range 115 -180°C. Computational analysis was performed using Monte Carlo (MC) simulations to quantify adsorption energies of different surface species. The results show that the rate of ammonia production from the in situ solid urea decomposition was higher using CoFe2O4 than Fe-BTC and Cu-BTC, and that there is very limited conversion of NO on the mixed solid urea-MOF systems due to site blocking. The main conclusions from this study is that MOFs have limited abilities in converting NO under low temperature conditions, and that surface regeneration requires additional experimental steps.

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