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Ghosh SK, Perla V, Mallick K. The electrical behaviour of ultrafine bismuth phosphate particles under a range of temperature and frequency conditions. Dalton Trans 2022; 51:5635-5644. [PMID: 35319054 DOI: 10.1039/d2dt00427e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Organic-molecule-stabilized ultrafine bismuth phosphate was synthesized by applying a wet chemical complexation-mediated route. Structural analysis confirmed the formation of monoclinic-phase nanoparticles made up of four-coordinated PO4 tetrahedral and eight-coordinated BiO8 polyhedral units. The dielectric, electrical conductivity, and impedance behaviour of the synthesized material was investigated under a wide range of frequency and temperature conditions. An alternating current conductivity study confirmed that the conduction process was followed by small and large polaron tunnelling mechanisms. An electric field-induced polarization study showed the formation of a hysteresis loop, generated as a result of the strong dipolar interactions through the Biδ+-Oδ--type covalent bonds.
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Affiliation(s)
- Sarit K Ghosh
- Department of Chemical Sciences, University of Johannesburg, P.O. Box: 524, Auckland Park, 2006, South Africa.
| | - Venkata Perla
- Department of Chemical Sciences, University of Johannesburg, P.O. Box: 524, Auckland Park, 2006, South Africa.
| | - Kaushik Mallick
- Department of Chemical Sciences, University of Johannesburg, P.O. Box: 524, Auckland Park, 2006, South Africa.
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2
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Sanko V, Şenocak A, Oğuz Tümay S, Çamurcu T, Demirbas E. Core‐shell Hierarchical Enzymatic Biosensor Based on Hyaluronic Acid Capped Copper Ferrite Nanoparticles for Determination of Endocrine‐disrupting Bisphenol A. ELECTROANAL 2021. [DOI: 10.1002/elan.202100386] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Vildan Sanko
- Department of Chemistry Gebze Technical University P.O.Box: 141 Gebze 41400 Kocaeli Turkey
| | - Ahmet Şenocak
- Department of Chemistry Gebze Technical University P.O.Box: 141 Gebze 41400 Kocaeli Turkey
| | - Süreyya Oğuz Tümay
- Department of Chemistry Gebze Technical University P.O.Box: 141 Gebze 41400 Kocaeli Turkey
| | - Taşkın Çamurcu
- Department of Chemistry Gebze Technical University P.O.Box: 141 Gebze 41400 Kocaeli Turkey
| | - Erhan Demirbas
- Department of Chemistry Gebze Technical University P.O.Box: 141 Gebze 41400 Kocaeli Turkey
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3
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High Efficiency Catalyst of Modified Y Molecular Sieve by Rare Earth La3+ Catalyzed the Synthesis of Cyclohexylbenzene from Benzene and Cyclohexene. Catal Letters 2021. [DOI: 10.1007/s10562-021-03676-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Darawsheh MD, Mazarío J, Lopes CW, Giménez-Marqués M, Domine ME, Meira DM, Martínez J, Mínguez Espallargas G, Oña-Burgos P. MOF-Mediated Synthesis of Supported Fe-Doped Pd Nanoparticles under Mild Conditions for Magnetically Recoverable Catalysis*. Chemistry 2020; 26:13659-13667. [PMID: 32521073 DOI: 10.1002/chem.202001895] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2020] [Indexed: 11/09/2022]
Abstract
Metal-organic framework (MOF)-driven synthesis is considered as a promising alternative for the development of new catalytic materials with well-designed active sites. This synthetic approach is used here to gradually transform a new bimetallic MOF, with Pd and Fe as the metal components, by the in situ generation of aniline under mild conditions. This methodology results in a compositionally homogeneous nanocomposite formed by Fe-doped Pd nanoparticles that, in turn, are supported on iron oxide-doped carbon. The nanocomposite has been fully characterized by several techniques such as IR and Raman spectroscopy, TEM, XPS, and XAS. The performance of this nanocomposite as an heterogeneous catalyst for hydrogenation of nitroarenes and nitrobenzene coupling with benzaldehyde has been evaluated, proving it to be an efficient and reusable catalyst.
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Affiliation(s)
- Mohanad D Darawsheh
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, c/ Catedrático José Beltrán, 2, 46980, Paterna, Spain
| | - Jaime Mazarío
- Instituto de Tecnología Química, Universitat Politècnica de, València, Consejo Superior de Investigaciones Científicas (UPV-CSIC), Avda. de los Naranjos s/n, 46022, Valencia, Spain
| | - Christian W Lopes
- Laboratory of Reactivity and Catalysis-Institute of Chemistry, Universidade Federal do Rio Grande do Sul, 91501970, Porto Alegre, Brazil
| | - Mónica Giménez-Marqués
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, c/ Catedrático José Beltrán, 2, 46980, Paterna, Spain
| | - Marcelo E Domine
- Instituto de Tecnología Química, Universitat Politècnica de, València, Consejo Superior de Investigaciones Científicas (UPV-CSIC), Avda. de los Naranjos s/n, 46022, Valencia, Spain
| | - Debora M Meira
- CLS@APS sector 20, Advanced Photon Source, Argonne National Laboratory, 9700 S. Cass Avenue, Lemont, IL, 60439, USA.,Canadian Light Source Inc., 44 Innovation Boulevard, Saskatoon, SK, S7N 2V3, Canada
| | - Jordan Martínez
- Instituto de Tecnología Química, Universitat Politècnica de, València, Consejo Superior de Investigaciones Científicas (UPV-CSIC), Avda. de los Naranjos s/n, 46022, Valencia, Spain
| | - Guillermo Mínguez Espallargas
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, c/ Catedrático José Beltrán, 2, 46980, Paterna, Spain
| | - Pascual Oña-Burgos
- Instituto de Tecnología Química, Universitat Politècnica de, València, Consejo Superior de Investigaciones Científicas (UPV-CSIC), Avda. de los Naranjos s/n, 46022, Valencia, Spain.,Department of Chemistry and Physics, Research Centre CIAIMBITAL, University of Almería, Ctra. Sacramento, s/n, Almería, 04120, Spain
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Meng F, Ding Y, Meng W, Mi G, Qiu J. Modification of Molecular Sieves USY and Their Application in the Alkylation Reaction of Benzene with Cyclohexene. ChemistrySelect 2020. [DOI: 10.1002/slct.202002320] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Fanfei Meng
- College of Chemical & Pharmaceutical EngineeringJilin Institute of Chemical Technology Jilin City 132022 China
| | - Yuansheng Ding
- College of Chemical & Pharmaceutical EngineeringJilin Institute of Chemical Technology Jilin City 132022 China
| | - Wei Meng
- Beijing National Laboratory for Molecular SciencesCAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences Beijing 100190 China
| | - Guangyi Mi
- Beijing No.2 Railway Middle School, Beijing, 100045, China Jun QiuCollege of Chemical & Pharmaceutical Engineering, Jilin Institute of Chemical Technology Jilin 132022 China
| | - Jun Qiu
- College of Chemical & Pharmaceutical EngineeringJilin Institute of Chemical Technology Jilin City 132022 China
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Chen TN, Kao JC, Zhong XY, Chan SJ, Patra AS, Lo YC, Huang MH. Facet-Specific Photocatalytic Activity Enhancement of Cu 2O Polyhedra Functionalized with 4-Ethynylanaline Resulting from Band Structure Tuning. ACS CENTRAL SCIENCE 2020; 6:984-994. [PMID: 32607445 PMCID: PMC7318064 DOI: 10.1021/acscentsci.0c00367] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Indexed: 05/16/2023]
Abstract
Cu2O rhombic dodecahedra, octahedra, and cubes were densely modified with conjugated 4-ethynylaniline (4-EA) for facet-dependent photocatalytic activity examination. Infrared spectroscopy affirms bonding of the acetylenic group of 4-EA onto the surface copper atoms. The photocatalytically inactive Cu2O cubes showed surprisingly high activity toward methyl orange photodegradation after 4-EA modification, while the already active Cu2O rhombic dodecahedra and octahedra exhibited a photocatalytic activity enhancement. Electron, hole, and radical scavenger experiments prove that the photocatalytic charge transport processes have occurred in the functionalized Cu2O cubes. Electrochemical impedance spectroscopy also indicates reduced charge transfer resistance of the functionalized Cu2O crystals. A band diagram constructed from UV-vis spectral and Mott-Schottky measurements reveals significant band energy shifts in all Cu2O samples after decorating with 4-EA. From density functional theory (DFT) calculations, a new band has emerged slightly above the valence band maximum within the band gap of Cu2O, which has been found to originate from 4-EA through band-decomposed charge density analysis. The increased charge density localized on the 4-EA molecule and the smallest electron transition energy to reach the 4-EA-generated band are factors making {100}-bound Cu2O cubes photocatalytically active. Proper molecular decoration represents a powerful approach to improving the photocatalytic efficiency of semiconductors.
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Affiliation(s)
- Tzu-Ning Chen
- Department
of Chemistry and Frontier Research Center on Fundamental and Applied
Sciences of Matters, National Tsing Hua
University, Hsinchu 30013, Taiwan
| | - Jui-Cheng Kao
- Department
of Materials Science and Engineering, National
Chiao Tung University, Hsinchu 30010, Taiwan
| | - Xin-Yan Zhong
- Department
of Materials Science and Engineering, National
Chiao Tung University, Hsinchu 30010, Taiwan
| | - Shang-Ju Chan
- Department
of Chemistry and Frontier Research Center on Fundamental and Applied
Sciences of Matters, National Tsing Hua
University, Hsinchu 30013, Taiwan
| | - Anindya S. Patra
- Department
of Chemistry and Frontier Research Center on Fundamental and Applied
Sciences of Matters, National Tsing Hua
University, Hsinchu 30013, Taiwan
| | - Yu-Chieh Lo
- Department
of Materials Science and Engineering, National
Chiao Tung University, Hsinchu 30010, Taiwan
- E-mail:
| | - Michael H. Huang
- Department
of Chemistry and Frontier Research Center on Fundamental and Applied
Sciences of Matters, National Tsing Hua
University, Hsinchu 30013, Taiwan
- E-mail:
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