51
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Reddy NL, Kumar S, Krishnan V, Sathish M, Shankar M. Multifunctional Cu/Ag quantum dots on TiO 2 nanotubes as highly efficient photocatalysts for enhanced solar hydrogen evolution. J Catal 2017. [DOI: 10.1016/j.jcat.2017.02.032] [Citation(s) in RCA: 86] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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52
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Kohantorabi M, Gholami MR. AgPt nanoparticles supported on magnetic graphene oxide nanosheets for catalytic reduction of 4‐nitrophenol: Studies of kinetics and mechanism. Appl Organomet Chem 2017. [DOI: 10.1002/aoc.3806] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Mona Kohantorabi
- Department of ChemistrySharif University of Technology Tehran 11365‐11155 Iran
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53
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You JG, Shanmugam C, Liu YW, Yu CJ, Tseng WL. Boosting catalytic activity of metal nanoparticles for 4-nitrophenol reduction: Modification of metal naoparticles with poly(diallyldimethylammonium chloride). JOURNAL OF HAZARDOUS MATERIALS 2017; 324:420-427. [PMID: 27856049 DOI: 10.1016/j.jhazmat.2016.11.007] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Revised: 11/01/2016] [Accepted: 11/02/2016] [Indexed: 06/06/2023]
Abstract
Most of the previously reported studies have focused on the change in the size, morphology, and composition of metal nanocatalysts for improving their catalytic activity. Herein, we report poly(diallyldimethylammonium chloride) [PDDA]-stabilized nanoparticles (NPs) of platinum (Pt) and palladium (Pd) as highly active and efficient catalysts for hydrogenation of 4-nitrophenol (4-NP) in the presence of NaBH4. PDDA-stabilized Pt and Pd NPs possessed similar particle size and same facet with citrate-capped Pt and Pd NPs, making this study to investigate the inter-relationship between catalytic activity and surface ligand without the consideration of the effects of particle size and facet. Compared to citrate-capped Pt and Pd NPs, PDDA-stabilized Pt and Pd NPs exhibited excellent pH and salt stability. PDDA could serve as an electron acceptor for metal NPs to produce the net positive charges on the metal surface, which provide strong electrostatic attraction with negatively charged nitrophenolate and borohydride ions. The activity parameter and rate constant of PDDA-stabilized metal NPs were higher than those of citrate-capped metal NPs. Compared to the previously reported Pd nanomaterials for the catalysis of NaBH4-mediated reduction of 4-NP, PDDA-stabilized Pd NPs exhibited the extremely high activity parameter (195s-1g-1) and provided excellent scalability and reusability.
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Affiliation(s)
- Jyun-Guo You
- Department of Chemistry, National Sun Yat-sen University, Taiwan
| | | | - Yao-Wen Liu
- Department of Applied Physics and Chemistry, University of Taipei, Taiwan
| | - Cheng-Ju Yu
- Department of Applied Physics and Chemistry, University of Taipei, Taiwan
| | - Wei-Lung Tseng
- Department of Chemistry, National Sun Yat-sen University, Taiwan; School of Pharmacy, College of Pharmacy, Kaohsiung Medical University, Taiwan; Center for Nanoscience and Nanotechnology, National Sun Yat-sen University, Taiwan.
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54
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Xing ZM, Gao YX, Shi LY, Liu XQ, Jiang Y, Sun LB. Fabrication of gold nanoparticles in confined spaces using solid-phase reduction: Significant enhancement of dispersion degree and catalytic activity. Chem Eng Sci 2017. [DOI: 10.1016/j.ces.2016.10.029] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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55
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Guo P, Huang X, Li L, Zhao S. Interfacial self-assembly approach of plasmonic nanostructures for efficient SERS and recyclable catalysts applications. Chem Res Chin Univ 2017. [DOI: 10.1007/s40242-017-6034-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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56
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Sadeghzadeh SM, Zhiani R, Emrani S, Ghabdian M. C–C coupling reactions using a gold(iii) phosphorus complex confined within metal–organic framework fibers in aqueous solution. RSC Adv 2017. [DOI: 10.1039/c7ra10507j] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
HPG@KCC-1/PPh2/Au NPs were used for the first time as a catalyst for the C–C cross-coupling between allylarenes or methyl acrylate and benzoxazole, and they showed excellent catalytic activities under green conditions.
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Affiliation(s)
| | - Rahele Zhiani
- Department of Chemistry
- Faculty of Sciences
- Neyshabur Branch
- Islamic Azad University
- Neyshabur
| | - Shokufe Emrani
- Department of Chemistry
- Faculty of Sciences
- Neyshabur Branch
- Islamic Azad University
- Neyshabur
| | - Mahdieh Ghabdian
- Department of Chemistry
- Faculty of Sciences
- Neyshabur Branch
- Islamic Azad University
- Neyshabur
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57
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Huang R, Zhu H, Su R, Qi W, He Z. Catalytic Membrane Reactor Immobilized with Alloy Nanoparticle-Loaded Protein Fibrils for Continuous Reduction of 4-Nitrophenol. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:11263-11273. [PMID: 27623375 DOI: 10.1021/acs.est.6b03431] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A catalytic membrane reactor, which contains a membrane matrix and a catalytic film of alloy nanoparticle-loaded β-lactoglobulin fibrils (NPs@β-LGF), was developed for the continuous-flow reduction of 4-nitrophenol (4-NP). The Cu-Ag and Cu-Ag-Au alloy NPs were synthesized using β-LGF as a scaffold and stabilizing agent. In this process, the Cu nanoclusters were formed in the initial stage and were able to promote the synthesis of Ag0, which acts as a reducing agent for the rapid formation of Au0. Furthermore, a catalytic membrane reactor was constructed by depositing the NPs@β-LGFs on a membrane matrix. The catalytic activity of the Cu-Ag-Au alloy NPs was higher than that of the Cu-Ag alloy NPs, using the reduction of 4-NP to 4-AP as a model reaction. The observed rate constant in the continuous-flow system is also higher than that in the batch system. In addition, these catalytic membrane reactors had good operating stability and antibacterial activity.
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Affiliation(s)
| | | | - Rongxin Su
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Tianjin 300072, PR China
| | - Wei Qi
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Tianjin 300072, PR China
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58
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Zhang HN, Jia WG, Xu QT, Ji CC. Synthesis, characterization and catalytic activity of gold complexes with pyridine-based selone ligands. Inorganica Chim Acta 2016. [DOI: 10.1016/j.ica.2016.06.023] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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59
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Li X, Hu Y, An Q, Luan X, Zhang Q, Zhang Y. Fuzzy, copper-based multi-functional composite particles serving simultaneous catalytic and signal-enhancing roles. NANOSCALE 2016; 8:9376-9381. [PMID: 27091497 DOI: 10.1039/c6nr02022d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Multifunctional plasmonic particles serving simultaneously as catalysts and label-free reporting agents are highly pursued due to their great potential in enhancing reaction operational efficiencies. Copper is an abundant and economic resource, and it possesses practical applicability in industries, but no dual-functional copper-based catalytic and self-reporting particles have been reported so far. This study proposes a facile strategy to prepare high-performance dual-functional copper-based composite particles that catalyze reactions and simultaneously serve as a SERS (surface enhanced Raman spectra) active, label-free reporting agent. Polyelectrolyte-modified reduced graphene oxide particles are used as the reactive precursors in the fabrication method. Upon adding Cu(NO3)2 solutions into the precursor dispersions, composite particles comprised by copper/copper oxide core and polyelectrolyte-graphene shell were facilely obtained under sonication. The as-prepared composite particles efficiently catalyzed the conversion of 4-nitrophenol to 4-aminophenol and simultaneously acted as the SERS-active substrate to give enhanced Raman spectra of the produced 4-aminophenol. Taking advantage of the assembling capabilities of polyelectrolyte shells, the composite particles could be further assembled onto a planar substrate to catalyze organic reactions, facilitating their application in various conditions. We expect this report to promote the fabrication and application of copper-based multifunctional particles.
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Affiliation(s)
- Xiangming Li
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing, 100083, China.
| | - Yingmo Hu
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing, 100083, China.
| | - Qi An
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing, 100083, China.
| | - Xinglong Luan
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing, 100083, China.
| | - Qian Zhang
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing, 100083, China.
| | - Yihe Zhang
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing, 100083, China.
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60
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Tan NPB, Lee CH, Li P. Green Synthesis of Smart Metal/Polymer Nanocomposite Particles and Their Tuneable Catalytic Activities. Polymers (Basel) 2016; 8:polym8040105. [PMID: 30979194 PMCID: PMC6432224 DOI: 10.3390/polym8040105] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2016] [Revised: 03/12/2016] [Accepted: 03/17/2016] [Indexed: 12/30/2022] Open
Abstract
Herein we report a simple and green synthesis of smart Au and Ag@Au nanocomposite particles using poly(N-isopropylacrylamide)/polyethyleneimine (PNIPAm/PEI) core-shell microgels as dual reductant and templates in an aqueous system. The nanocomposite particles were synthesized through a spontaneous reduction of tetrachloroauric (III) acid to gold nanoparticles at room temperature, and in situ encapsulation and stabilization of the resultant gold nanoparticles (AuNPs) with amine-rich PEI shells. The preformed gold nanoparticles then acted as seed nanoparticles for further generation of Ag@Au bimetallic nanoparticles within the microgel templates at 60 °C. These nanocomposite particles were characterized by TEM, AFM, XPS, UV-vis spectroscopy, zeta-potential, and particle size analysis. The synergistic effects of the smart nanocomposite particles were studied via the reduction of p-nitrophenol to p-aminophenol. The catalytic performance of the bimetallic Ag@Au nanocomposite particles was 25-fold higher than that of the monometallic Au nanoparticles. Finally, the controllable catalytic activities of the Au@PNIPAm/PEI nanocomposite particles were demonstrated via tuning the solution pH and temperature.
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Affiliation(s)
- Noel Peter Bengzon Tan
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China.
| | - Cheng Hao Lee
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China.
| | - Pei Li
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China.
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61
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Huang Y, Lin Y, Ran X, Ren J, Qu X. Self-Assembly and Compartmentalization of Nanozymes in Mesoporous Silica-Based Nanoreactors. Chemistry 2016; 22:5705-11. [DOI: 10.1002/chem.201504704] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2015] [Indexed: 11/11/2022]
Affiliation(s)
- Yanyan Huang
- Laboratory of Chemical Biology and; State Key Laboratory of Rare Earth Resource Utilization; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences, Changchun; Jilin 130022 P.R. China
- Graduate School of the University of the; Chinese Academy of Sciences; Beijing 100039 China
| | - Youhui Lin
- Laboratory of Chemical Biology and; State Key Laboratory of Rare Earth Resource Utilization; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences, Changchun; Jilin 130022 P.R. China
- Graduate School of the University of the; Chinese Academy of Sciences; Beijing 100039 China
| | - Xiang Ran
- Laboratory of Chemical Biology and; State Key Laboratory of Rare Earth Resource Utilization; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences, Changchun; Jilin 130022 P.R. China
- Graduate School of the University of the; Chinese Academy of Sciences; Beijing 100039 China
| | - Jinsong Ren
- Laboratory of Chemical Biology and; State Key Laboratory of Rare Earth Resource Utilization; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences, Changchun; Jilin 130022 P.R. China
| | - Xiaogang Qu
- Laboratory of Chemical Biology and; State Key Laboratory of Rare Earth Resource Utilization; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences, Changchun; Jilin 130022 P.R. China
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62
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Wei J, Hoagland DA, Zhang G, Su Z. Effect of Divalent Counterions on Polyelectrolyte Multilayer Properties. Macromolecules 2016. [DOI: 10.1021/acs.macromol.5b02151] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Jingjing Wei
- State
Key Laboratory of Polymer Physics and Chemistry, Changchun Institute
of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, P. R. China
| | - David A. Hoagland
- Polymer
Science and Engineering Department, University of Massachusetts Amherst, Amherst, Massachusetts 01003, United States
| | - Guangyu Zhang
- State
Key Laboratory of Polymer Physics and Chemistry, Changchun Institute
of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, P. R. China
| | - Zhaohui Su
- State
Key Laboratory of Polymer Physics and Chemistry, Changchun Institute
of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, P. R. China
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63
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Gawande MB, Goswami A, Asefa T, Guo H, Biradar AV, Peng DL, Zboril R, Varma RS. Core-shell nanoparticles: synthesis and applications in catalysis and electrocatalysis. Chem Soc Rev 2016; 44:7540-90. [PMID: 26288197 DOI: 10.1039/c5cs00343a] [Citation(s) in RCA: 468] [Impact Index Per Article: 58.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Core-shell nanoparticles (CSNs) are a class of nanostructured materials that have recently received increased attention owing to their interesting properties and broad range of applications in catalysis, biology, materials chemistry and sensors. By rationally tuning the cores as well as the shells of such materials, a range of core-shell nanoparticles can be produced with tailorable properties that can play important roles in various catalytic processes and offer sustainable solutions to current energy problems. Various synthetic methods for preparing different classes of CSNs, including the Stöber method, solvothermal method, one-pot synthetic method involving surfactants, etc., are briefly mentioned here. The roles of various classes of CSNs are exemplified for both catalytic and electrocatalytic applications, including oxidation, reduction, coupling reactions, etc.
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Affiliation(s)
- Manoj B Gawande
- Regional Centre of Advanced Technologies and Materials, Faculty of Science, Department of Physical Chemistry, Palacky University, Šlechtitelů 11, 783 71, Olomouc, Czech Republic.
| | - Anandarup Goswami
- Regional Centre of Advanced Technologies and Materials, Faculty of Science, Department of Physical Chemistry, Palacky University, Šlechtitelů 11, 783 71, Olomouc, Czech Republic. and Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, 610 Taylor Road, Piscataway, New Jersey 08854, USA
| | - Tewodros Asefa
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, 610 Taylor Road, Piscataway, New Jersey 08854, USA and Department of Chemical and Biochemical Engineering, Rutgers, The State University of New Jersey, 98 Brett Road, Piscataway, New Jersey 08854, USA
| | - Huizhang Guo
- Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen 361005, People's Republic of China
| | - Ankush V Biradar
- Catalysis Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, India
| | - Dong-Liang Peng
- Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen 361005, People's Republic of China
| | - Radek Zboril
- Regional Centre of Advanced Technologies and Materials, Faculty of Science, Department of Physical Chemistry, Palacky University, Šlechtitelů 11, 783 71, Olomouc, Czech Republic.
| | - Rajender S Varma
- Sustainable Technology Division, National Risk Management Research Laboratory, US Environmental Protection Agency, 26 West Martin Luther King Drive, MS 443, Cincinnati, Ohio 45268, USA.
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64
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Vellaichamy B, Periakaruppan P. Silver nanoparticle-embedded RGO-nanosponge for superior catalytic activity towards 4-nitrophenol reduction. RSC Adv 2016. [DOI: 10.1039/c6ra19834a] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The present work highlights a bio-inspired synthesis of uniform 2 nm sized plasmonic silver nanospheres (Ag-NSs) embedded in reduced graphene oxide nanosponge (RGONS) using Tabebuia berteroi leaf extract.
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65
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Ghosh Chaudhuri R, Paria S. Au and Ag/Au double-shells hollow nanoparticles with improved near infrared surface plasmon and photoluminescence properties. J Colloid Interface Sci 2016; 461:15-19. [DOI: 10.1016/j.jcis.2015.09.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2015] [Revised: 09/02/2015] [Accepted: 09/02/2015] [Indexed: 10/23/2022]
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66
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Deka P, Choudhury R, Deka RC, Bharali P. Influence of Ni on enhanced catalytic activity of Cu/Co3O4 towards reduction of nitroaromatic compounds: studies on the reduction kinetics. RSC Adv 2016. [DOI: 10.1039/c6ra16301g] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
Addition of Ni significantly enhances the reaction rates of Cu/Co3O4 for the catalytic reduction of nitroaromatic compounds.
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Affiliation(s)
- Pangkita Deka
- Department of Chemical Sciences
- Tezpur University
- Napaam-784 028
- India
| | - Rimjim Choudhury
- Department of Chemical Sciences
- Tezpur University
- Napaam-784 028
- India
| | - Ramesh C. Deka
- Department of Chemical Sciences
- Tezpur University
- Napaam-784 028
- India
| | - Pankaj Bharali
- Department of Chemical Sciences
- Tezpur University
- Napaam-784 028
- India
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67
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Li Z, Zheng X, Sheng Q, Yang Z, Zheng J. Preparation of Au@Ag nanoparticles at a gas/liquid interface and their application for sensitive detection of hydrogen peroxide. RSC Adv 2016. [DOI: 10.1039/c5ra26857e] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Preparation of Au@Ag NPs at a gas/liquid interface by a seed-mediated growth procedure and their application for sensitive detection of hydrogen peroxide.
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Affiliation(s)
- Zhi Li
- Institute of Analytical Science
- Shaanxi Provincial Key Laboratory of Electroanalytical Chemistry
- Northwest University
- Xi'an
- China
| | - Xiaohui Zheng
- Institute of Analytical Science
- Shaanxi Provincial Key Laboratory of Electroanalytical Chemistry
- Northwest University
- Xi'an
- China
| | - Qinglin Sheng
- Institute of Analytical Science
- Shaanxi Provincial Key Laboratory of Electroanalytical Chemistry
- Northwest University
- Xi'an
- China
| | - Ziyin Yang
- Institute of Analytical Science
- Shaanxi Provincial Key Laboratory of Electroanalytical Chemistry
- Northwest University
- Xi'an
- China
| | - Jianbin Zheng
- Institute of Analytical Science
- Shaanxi Provincial Key Laboratory of Electroanalytical Chemistry
- Northwest University
- Xi'an
- China
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68
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Hong M, Xu L, Wang F, Xu S, Li H, Li CZ, Liu J. In situ synthesized Au–Ag nanocages on graphene oxide nanosheets: a highly active and recyclable catalyst for the reduction of 4-nitrophenol. NEW J CHEM 2016. [DOI: 10.1039/c5nj02978c] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Graphene oxide-supported hollow Au–Ag alloy nanocages were synthesized here, which exhibited short induction time, high catalytic activity and good stability against agglomeration for the reduction of 4-nitrophenol to 4-aminophenol.
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Affiliation(s)
- Min Hong
- Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology
- School of Chemistry and Chemical Engineering
- Liaocheng University
- Liaocheng 252059
- China
| | - Lidan Xu
- Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology
- School of Chemistry and Chemical Engineering
- Liaocheng University
- Liaocheng 252059
- China
| | - Fangli Wang
- Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology
- School of Chemistry and Chemical Engineering
- Liaocheng University
- Liaocheng 252059
- China
| | - Shuling Xu
- Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology
- School of Chemistry and Chemical Engineering
- Liaocheng University
- Liaocheng 252059
- China
| | - Haibo Li
- Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology
- School of Chemistry and Chemical Engineering
- Liaocheng University
- Liaocheng 252059
- China
| | - Chen-zhong Li
- Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology
- School of Chemistry and Chemical Engineering
- Liaocheng University
- Liaocheng 252059
- China
| | - Jifeng Liu
- Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology
- School of Chemistry and Chemical Engineering
- Liaocheng University
- Liaocheng 252059
- China
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69
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Gong W, Su L, Zhang X. Preparation of catalytic films of the Au nanoparticle-carbon composite tubular arrays. Chem Commun (Camb) 2015; 51:6333-6. [PMID: 25760286 DOI: 10.1039/c5cc00798d] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Catalytic films comprising the arrayed mesoporous and big-inner-diameter carbon nanotubes embedded with high density Au nanoparticles were prepared through a template-directed carbonization route.
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Affiliation(s)
- Wei Gong
- Research Center for Bioengineering and Sensing Technology, University of Science and Technology Beijing, Beijing 100083, China.
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70
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Monga A, Pal B. Preparation and characterization of different shapes of Au–Ag bimetallic nanocomposites for enhanced physicochemical properties. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2015.04.051] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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71
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Saw ET, Oemar U, Ang ML, Hidajat K, Kawi S. Highly Active and Stable Bimetallic Nickel-Copper Core-Ceria Shell Catalyst for High-Temperature Water-Gas Shift Reaction. ChemCatChem 2015. [DOI: 10.1002/cctc.201500481] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Eng Toon Saw
- Department of Chemical and Biomolecular Engineering; National University of Singapore; 4 Engineering Drive 4 119260 Singapore, Fax: (+65) 67791936
| | - Usman Oemar
- Department of Chemical and Biomolecular Engineering; National University of Singapore; 4 Engineering Drive 4 119260 Singapore, Fax: (+65) 67791936
| | - Ming Li Ang
- Department of Chemical and Biomolecular Engineering; National University of Singapore; 4 Engineering Drive 4 119260 Singapore, Fax: (+65) 67791936
| | - Kus Hidajat
- Department of Chemical and Biomolecular Engineering; National University of Singapore; 4 Engineering Drive 4 119260 Singapore, Fax: (+65) 67791936
| | - Sibudjing Kawi
- Department of Chemical and Biomolecular Engineering; National University of Singapore; 4 Engineering Drive 4 119260 Singapore, Fax: (+65) 67791936
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72
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Ghorbanpour A, Gumidyala A, Grabow LC, Crossley SP, Rimer JD. Epitaxial Growth of ZSM-5@Silicalite-1: A Core-Shell Zeolite Designed with Passivated Surface Acidity. ACS NANO 2015; 9:4006-16. [PMID: 25824422 DOI: 10.1021/acsnano.5b01308] [Citation(s) in RCA: 75] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The design of materials with spatially controlled chemical composition has potential advantages for wide-reaching applications that span energy to medicine. Here, we present a method for preparing a core-shell aluminosilicate zeolite with continuous translational symmetry of nanopores and an epitaxial shell of tunable thickness that passivates Brønsted acid sites associated with framework Al on exterior surfaces. For this study, we selected the commercially relevant MFI framework type and prepared core-shell particles consisting of an aluminosilicate core (ZSM-5) and a siliceous shell (silicalite-1). Transmission electron microscopy and gas adsorption studies confirmed that silicalite-1 forms an epitaxial layer on ZSM-5 crystals without blocking pore openings. Scanning electron microscopy and dynamic light scattering were used in combination to confirm that the shell thickness can be tailored with nanometer resolution (e.g., 5-20 nm). X-ray photoelectron spectroscopy and temperature-programmed desorption measurements revealed the presence of a siliceous shell, while probe reactions using molecules that were either too large or adequately sized to access MFI pores confirmed the uniform shell coverage. The synthesis of ZSM-5@silicalite-1 offers a pathway for tailoring the physicochemical properties of MFI-type materials, notably in the area of catalysis, where surface passivation can enhance product selectivity without sacrificing catalyst activity. The method described herein may prove to be a general platform for zeolite core-shell design with potentially broader applicability to other porous materials.
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Affiliation(s)
- Arian Ghorbanpour
- †Department of Chemical and Biomolecular Engineering, University of Houston, 4800 Calhoun Road, Houston, Texas 77204, United States
| | - Abhishek Gumidyala
- ‡Department of Chemical, Biological, and Materials Engineering, University of Oklahoma, 100 East Boyd Street, Norman, Oklahoma 73019, United States
| | - Lars C Grabow
- †Department of Chemical and Biomolecular Engineering, University of Houston, 4800 Calhoun Road, Houston, Texas 77204, United States
| | - Steven P Crossley
- ‡Department of Chemical, Biological, and Materials Engineering, University of Oklahoma, 100 East Boyd Street, Norman, Oklahoma 73019, United States
| | - Jeffrey D Rimer
- †Department of Chemical and Biomolecular Engineering, University of Houston, 4800 Calhoun Road, Houston, Texas 77204, United States
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73
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Zhao P, Feng X, Huang D, Yang G, Astruc D. Basic concepts and recent advances in nitrophenol reduction by gold- and other transition metal nanoparticles. Coord Chem Rev 2015. [DOI: 10.1016/j.ccr.2015.01.002] [Citation(s) in RCA: 476] [Impact Index Per Article: 52.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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74
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Zhang H, Lu L, Kawashima K, Okumura M, Haruta M, Toshima N. Synthesis and catalytic activity of crown jewel-structured (IrPd)/Au trimetallic nanoclusters. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2015; 27:1383-1388. [PMID: 25511851 DOI: 10.1002/adma.201404870] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2014] [Revised: 11/23/2014] [Indexed: 06/04/2023]
Abstract
Crown-jewel-structured (IrPd)/Au trimetallic nanoclusters are prepared by a galvanic replacement reaction using Ir/Pd nanoclusters with a structure of Ir rich in the core and Pd rich in the shell as mother clusters. The catalytic activity of the top Au atoms for aerobic glucose oxidation of the trimetallic nanoclusters is the highest ever reported among all supported and colloidal catalysts.
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Affiliation(s)
- Haijun Zhang
- The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, 430081, China
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75
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Yun J, Hwang SH, Jang J. Fabrication of Au@Ag core/shell nanoparticles decorated TiO2 hollow structure for efficient light-harvesting in dye-sensitized solar cells. ACS APPLIED MATERIALS & INTERFACES 2015; 7:2055-2063. [PMID: 25562329 DOI: 10.1021/am508065n] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Improving the light-harvesting properties of photoanodes is promising way to enhance the power conversion efficiency (PCE) of dye-sensitized solar cells (DSSCs). We synthesized Au@Ag core/shell nanoparticles decorated TiO2 hollow nanoparticles (Au@Ag/TiO2 HNPs) via sol-gel reaction and chemical deposition. The Au@Ag/TiO2 HNPs exhibited multifunctions from Au@Ag core/shell NPs (Au@Ag CSNPs) and TiO2 hollow nanoparticles (TiO2 HNPs). These Au@Ag CSNPs exhibited strong and broadened localized surface plasmon resonance (LSPR), together with a large specific surface area of 129 m(2) g(-1), light scattering effect, and facile oxidation-reduction reaction of electrolyte from TiO2 HNPs, which resulted in enhancement of the light harvesting. The optimum PCE of η = 9.7% was achieved for the DSSCs using photoanode materials based on TiO2 HNPs containing Au@Ag/TiO2 HNPs (0.2 wt % Au@Ag CSNPs with respect to TiO2 HNPs), which outperformed by 24% enhancement that of conventional photoanodes formed using P25 (η = 7.8%).
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Affiliation(s)
- Juyoung Yun
- School of Chemical and Biological Engineering, Seoul National University , 599 Gwanangno, Gwanakgu,, Seoul 151-742, Korea
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76
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Zheng Z, Tachikawa T, Majima T. Plasmon-Enhanced Formic Acid Dehydrogenation Using Anisotropic Pd–Au Nanorods Studied at the Single-Particle Level. J Am Chem Soc 2015; 137:948-57. [DOI: 10.1021/ja511719g] [Citation(s) in RCA: 287] [Impact Index Per Article: 31.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Zhaoke Zheng
- The
Institute of Scientific and Industrial Research (SANKEN), Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan
| | - Takashi Tachikawa
- Department
of Chemistry, Graduate School of Science, Kobe University, 1-1
Rokkodai-cho, Nada-ku, Kobe 657-8501, Japan
| | - Tetsuro Majima
- The
Institute of Scientific and Industrial Research (SANKEN), Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan
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77
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Qin L, Si G, Li X, Kang SZ. Synergetic effect of Cu–Pt bimetallic cocatalyst on SrTiO3 for efficient photocatalytic hydrogen production from water. RSC Adv 2015. [DOI: 10.1039/c5ra22757g] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The introduction of the Cu–Pt bimetal results in a significant improvement in the photocatalytic activity of STO. The hydrogen generation rate over STO/Cu95–Pt5 was about 46.6 and 2.79 times of STO and STO/Cu100–Pt0, respectively.
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Affiliation(s)
- Lixia Qin
- School of Chemical and Environmental Engineering
- Shanghai Institute of Technology
- Shanghai 201418
- China
| | - Guofeng Si
- School of Chemical and Environmental Engineering
- Shanghai Institute of Technology
- Shanghai 201418
- China
| | - Xiangqing Li
- School of Chemical and Environmental Engineering
- Shanghai Institute of Technology
- Shanghai 201418
- China
| | - Shi-Zhao Kang
- School of Chemical and Environmental Engineering
- Shanghai Institute of Technology
- Shanghai 201418
- China
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78
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Bao C, Zhou L, Shao Y, Wu Q, Ma J, Zhang H. Palladium-loaded magnetic core–shell porous carbon nanospheres derived from a metal–organic framework as a recyclable catalyst. RSC Adv 2015. [DOI: 10.1039/c5ra17971h] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Pd-loaded magnetic porous carbon nanospheres (Fe3O4@MC-Pd) were prepared by annealing Fe3O4@MIL-100/PdCl2, which was fabricated through a facile one-pot solvothermal method, at 450 °C in nitrogen atmosphere.
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Affiliation(s)
- Chao Bao
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Institute of Biochemical Engineering & Environmental Technology
- Lanzhou University
- Lanzhou 730000
| | - Lincheng Zhou
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Institute of Biochemical Engineering & Environmental Technology
- Lanzhou University
- Lanzhou 730000
| | - Yanming Shao
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Institute of Biochemical Engineering & Environmental Technology
- Lanzhou University
- Lanzhou 730000
| | - Qiong Wu
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Institute of Biochemical Engineering & Environmental Technology
- Lanzhou University
- Lanzhou 730000
| | - Junjun Ma
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Institute of Biochemical Engineering & Environmental Technology
- Lanzhou University
- Lanzhou 730000
| | - He Zhang
- State Key Laboratory of Applied Organic Chemistry
- College of Chemistry and Chemical Engineering
- Institute of Biochemical Engineering & Environmental Technology
- Lanzhou University
- Lanzhou 730000
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79
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Rahman ZU, Zhang T, Cui S, Wang D. Preparation and characterization of magnetic nanocomposite catalysts with double Au nanoparticle layers. RSC Adv 2015. [DOI: 10.1039/c5ra18119d] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Nanocomposite catalysts, with single and double gold layers, and with one gold layer and one silver layer were prepared through simple steps, and showed excellent activity in the reduction of nitrophenols.
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Affiliation(s)
- Zia Ur Rahman
- State Key Laboratory of Solid Lubrication
- Lanzhou Institute of Chemical Physics
- Chinese Academy of Sciences
- Lanzhou 730000
- China
| | - Tingting Zhang
- State Key Laboratory of Solid Lubrication
- Lanzhou Institute of Chemical Physics
- Chinese Academy of Sciences
- Lanzhou 730000
- China
| | - Siwen Cui
- State Key Laboratory of Solid Lubrication
- Lanzhou Institute of Chemical Physics
- Chinese Academy of Sciences
- Lanzhou 730000
- China
| | - Daoai Wang
- State Key Laboratory of Solid Lubrication
- Lanzhou Institute of Chemical Physics
- Chinese Academy of Sciences
- Lanzhou 730000
- China
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80
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Pan W, Zhang S, He F, Gai S, Sun Y, Yang P. A cheap and efficient catalyst with ultra-high activity for reduction of 4-nitrophenol. CrystEngComm 2015. [DOI: 10.1039/c5ce00678c] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ni/SBA-15 catalyst with ultra-small particle size (7 nm), good dispersion, and ultra-high loading amount (57.4%) of Ni nanoparticles was prepared by a unique in situ thermal decomposition and reduction route. It exhibits excellent catalytic activity and stability for 4-nitrophenol reduction.
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Affiliation(s)
- Weicheng Pan
- Key Laboratory of Superlight Materials and Surface Technology
- Ministry of Education
- College of Material Science and Chemical Engineering
- Harbin Engineering University
- Harbin 150001, PR China
| | - Shenghuan Zhang
- Key Laboratory of Superlight Materials and Surface Technology
- Ministry of Education
- College of Material Science and Chemical Engineering
- Harbin Engineering University
- Harbin 150001, PR China
| | - Fei He
- Key Laboratory of Superlight Materials and Surface Technology
- Ministry of Education
- College of Material Science and Chemical Engineering
- Harbin Engineering University
- Harbin 150001, PR China
| | - Shili Gai
- Key Laboratory of Superlight Materials and Surface Technology
- Ministry of Education
- College of Material Science and Chemical Engineering
- Harbin Engineering University
- Harbin 150001, PR China
| | - Yanbo Sun
- State Key Laboratory of Theoretical and Computational Chemistry
- Jilin University
- Changchun 130023, PR China
| | - Piaoping Yang
- Key Laboratory of Superlight Materials and Surface Technology
- Ministry of Education
- College of Material Science and Chemical Engineering
- Harbin Engineering University
- Harbin 150001, PR China
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81
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Gao S, Li W, Cao R. Bimetallic layer-by-layer films and their application in catalytic hydrogenation of olefin. Inorg Chem Front 2015. [DOI: 10.1039/c5qi00008d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Our bimetallic LbL films exhibit a superior catalytic activity toward hydrogenation of olefin.
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Affiliation(s)
- Shuiying Gao
- State Key Laboratory of Structural Chemistry
- Fujian Institute of Research on the Structure of Matter
- the Chinese Academy of Sciences
- Fuzhou 350002
- China
| | - Weijin Li
- State Key Laboratory of Structural Chemistry
- Fujian Institute of Research on the Structure of Matter
- the Chinese Academy of Sciences
- Fuzhou 350002
- China
| | - Rong Cao
- State Key Laboratory of Structural Chemistry
- Fujian Institute of Research on the Structure of Matter
- the Chinese Academy of Sciences
- Fuzhou 350002
- China
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82
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Monga A, Pal B. Morphological and physicochemical properties of Ag–Au binary nanocomposites prepared using different surfactant capped Ag nanoparticles. RSC Adv 2015. [DOI: 10.1039/c4ra16940a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The deposition of Au on Ag NPs passivated with PVP, CTAB and TX-100 surfactants resulted in the formation of hollow, solid and porous Ag–Au bimetallic NCs, respectively, exhibiting ∼2 times higher catalytic activity than the monometallic Ag NPs.
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Affiliation(s)
- Anila Monga
- School of Chemistry and Biochemistry
- Thapar University
- Patiala-147004
- India
| | - Bonamali Pal
- School of Chemistry and Biochemistry
- Thapar University
- Patiala-147004
- India
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83
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Monga A, Pal B. Improved catalytic activity and surface electro-kinetics of bimetallic Au–Ag core–shell nanocomposites. NEW J CHEM 2015. [DOI: 10.1039/c4nj01419g] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The Aucore–Agshell and hollow Ag–Au alloy nanostructures significantly improved (∼2 times) the reduction of 1,3-dinitrobenzene relative to the monometallic ones demonstrating the role of the synergistic effect of the Au–Ag interface in catalytic activity.
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Affiliation(s)
- Anila Monga
- School of Chemistry and Biochemistry
- Thapar University
- Patiala-147004
- India
| | - Bonamali Pal
- School of Chemistry and Biochemistry
- Thapar University
- Patiala-147004
- India
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84
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Ma B, Wang M, Tian D, Pei Y, Yuan L. Micro/nano-structured polyaniline/silver catalyzed borohydride reduction of 4-nitrophenol. RSC Adv 2015. [DOI: 10.1039/c5ra05396j] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Micro/nano-structured polyaniline/Ag composites with different morphologies were prepared. The composites were applied as a catalyst in the borohydride reduction reaction of 4-nitrophenol and showed comparable catalytic performance.
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Affiliation(s)
- Bing Ma
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan
- China
| | - Man Wang
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan
- China
| | - Di Tian
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan
- China
| | - Yanyan Pei
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan
- China
| | - Liangjie Yuan
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan
- China
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85
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Gopalakrishnan R, Loganathan B, Raghu K. Green synthesis of Au–Ag bimetallic nanocomposites using Silybum marianum seed extract and their application as a catalyst. RSC Adv 2015. [DOI: 10.1039/c5ra03571f] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An eco-friendly and non-toxic method for the synthesis of Au–Ag bimetallic nanocomposites has been carried out successfully. Silybum marianum seed extract plays an important role in the reduction and stabilization of the Au–Ag bimetallic nanocomposites.
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Affiliation(s)
| | | | - K. Raghu
- Department of Physics
- Annamalai University
- India
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86
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Chu C, Su Z. Facile synthesis of AuPt alloy nanoparticles in polyelectrolyte multilayers with enhanced catalytic activity for reduction of 4-nitrophenol. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:15345-15350. [PMID: 25454560 DOI: 10.1021/la5042019] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
In this work, bimetallic AuPt alloy nanoparticles were synthesized in situ in polyelectrolyte multilayers (PEMs) via an ion-exchange and coreduction process, in which the PEM support also served to suppress the Au-Pt phase separation, and thus enabled formation of AuPt alloy nanoparticles over a wide composition range. The PEM supported AuPt alloy nanoparticles exhibited higher catalytic activity than Au and Pt monometallic ones for the reduction of 4-nitrophenol by NaBH4, showing synergistic effects between Au and Pt. This work provides a facile approach to in situ synthesis of polymer supported bimetallic nanoparticles of tailored composition for optimum performance in catalysis and other applications.
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Affiliation(s)
- Chengcan Chu
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences , 5625 Renmin Street, Changchun 130022, P. R. China
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87
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Le X, Dong Z, Zhang W, Li X, Ma J. Fibrous nano-silica containing immobilized Ni@Au core–shell nanoparticles: A highly active and reusable catalyst for the reduction of 4-nitrophenol and 2-nitroaniline. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.molcata.2014.08.002] [Citation(s) in RCA: 74] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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88
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Huang Y, Lin Y, Ran X, Ren J, Qu X. A semipermeable enzymatic nanoreactor as an efficient modulator for reversible pH regulation. NANOSCALE 2014; 6:11328-11335. [PMID: 25141270 DOI: 10.1039/c4nr03437f] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Here we propose a new concept for the fabrication of a semipermeable enzymatic nanoreactor as an efficient modulator to reversibly switch the pH of an aqueous environment. We used amino-functionalized, expanded mesoporous silica nanoparticles (EMSN) as a model nanocarrier to load enzymes. In order to protect enzymes from the interference of a complicated environment, polyelectrolyte multilayers (PEMs) were coated on the surface of the EMSN through layer by layer (LbL) assembly. These PEMs can serve as semipermeable membranes, allowing small molecules to diffuse in and out freely while trapping the enzymes in the nanoreactors. Compared with traditional electrochemical stimulation or optical control methods, our enzymatic regulation platform is easy to operate without complicated instruments. In addition, this system can cover a wide range of pH values and conveniently regulate pH values by simply controlling the concentrations of catalysts or reactants. Meanwhile, this strategy could be generalized to other enzymes or nanocarriers to achieve reversible pH regulation for different purposes. The switched pH values can be implemented for the modulation of the conformational changes of nucleic acids and activation of the charge conversion in drug delivery applications.
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Affiliation(s)
- Yanyan Huang
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Changchun, Jilin 130022, China.
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89
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Liu X, Li L, Ye M, Xue Y, Chen S. Polyaniline:poly(sodium 4-styrenesulfonate)-stabilized gold nanoparticles as efficient, versatile catalysts. NANOSCALE 2014; 6:5223-5229. [PMID: 24686770 DOI: 10.1039/c4nr00328d] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Gold nanoparticles were stabilized by a polyaniline:poly(sodium 4-styrenesulfonate) (PANI:PSS) matrix and readily dispersed in water over a wide range of pH. In contrast to nanoparticles passivated by alkanethiolates that formed a compact capping layer on the nanoparticle surface, the PANI:PSS-Au nanocomposites exhibited apparent catalytic activity in the reduction of 4-nitrophenol in the presence of excessive NaBH4, with reasonably good recyclability, which was likely due to the large accessible surface area. In addition, the PANI:PSS-Au nanocomposites also demonstrated peroxidase-like catalytic activity as evidenced by the colorimetric detection of H2O2 and glucose with PANI:PSS-Au as the enzymatic mimic. The present method may find potential applications in the design, preparation and functionalization of noble nanoparticles as efficient, versatile, and recyclable catalysts with high dispersibility and stability in aqueous media.
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Affiliation(s)
- Xiaojun Liu
- New Energy Research Institute, School of Environment and Energy, South China University of Technology, University Town, Guangzhou 510006, China.
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90
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Park HH, Woo K, Ahn JP. Core-shell bimetallic nanoparticles robustly fixed on the outermost surface of magnetic silica microspheres. Sci Rep 2014; 3:1497. [PMID: 23511209 PMCID: PMC3603323 DOI: 10.1038/srep01497] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2012] [Accepted: 03/04/2013] [Indexed: 11/09/2022] Open
Abstract
The major challenges in practically utilising the immense potential benefits of nanomaterials are controlling aggregation, recycling the nanomaterials, and fabricating well-defined nanoparticulate materials using innovative methods. We present a novel innovative synthetic strategy for core–shell bimetallic nanoparticles that are well-defined, ligand-free, and robustly fixed on the outermost surface of recyclable magnetic silica microspheres. The strategy includes seeding, coalescing the seeds to cores, and then growing shells from the cores on aminopropyl-functionalised silica microspheres so that the cores and aminopropyl moieties are robustly embedded in the shell materials. The representative Au–Ag bimetallic nanoparticles fixed on the microsphere showed excellent catalytic performance that remained consistent during repeated catalytic cycles.
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Affiliation(s)
- Hye Hun Park
- Molecular Recognition Research Center, Korea Institute of Science and Technology, P. O. Box 131, Cheongryang, Seoul 130-650, Korea
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91
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Kleijn SEF, Lai SCS, Koper MTM, Unwin PR. Electrochemistry of Nanoparticles. Angew Chem Int Ed Engl 2014; 53:3558-86. [DOI: 10.1002/anie.201306828] [Citation(s) in RCA: 304] [Impact Index Per Article: 30.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2013] [Indexed: 01/01/2023]
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92
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93
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Zhang Z, Xiao F, Xi J, Sun T, Xiao S, Wang H, Wang S, Liu Y. Encapsulating Pd nanoparticles in double-shelled graphene@carbon hollow spheres for excellent chemical catalytic property. Sci Rep 2014; 4:4053. [PMID: 24514577 PMCID: PMC3920280 DOI: 10.1038/srep04053] [Citation(s) in RCA: 99] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2013] [Accepted: 01/20/2014] [Indexed: 11/09/2022] Open
Abstract
Double-shelled hollow carbon spheres with reduced graphene oxide (RGO) as inner shell and carbon (C) layer as outer shell have been successfully designed and prepared. This tailor-making structure acts as an excellent capsule for encapsulating with ultrafine Pd nanoparticles (Pd NPs), which could effectively prevent Pd NPs from aggregation and leaching. As a result, the as-obtained RGO@Pd@C nanohybid exhibits superior and stable catalytic performance. With the aid of RGO@Pd@C, the reduction reaction of 4-nitrophenol (4-NP) to 4-aminophenol with NaBH4 as reducing agent can be finished within only 30 s, even the content of Pd is as low as 0.28 wt%. As far as we know, RGO@Pd@C is one of the most effective catalyst for 4-NP reducing reaction up to now.
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Affiliation(s)
- Zheye Zhang
- School of Chemistry & Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China
| | - Fei Xiao
- School of Chemistry & Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China
| | - Jiangbo Xi
- School of Chemistry & Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China
| | - Tai Sun
- School of Chemistry & Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China
| | - Shuang Xiao
- School of Chemistry & Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China
| | - Hairong Wang
- Institute of Environmental and Municipal Engineering, North China University of Water Resources and Electric Power, Zhengzhou, 450011, P. R. China
| | - Shuai Wang
- School of Chemistry & Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China
| | - Yunqi Liu
- Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
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94
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Zhou J, Duan B, Fang Z, Song J, Wang C, Messersmith PB, Duan H. Interfacial assembly of mussel-inspired au@ag@ polydopamine core-shell nanoparticles for recyclable nanocatalysts. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2014; 26:701-705. [PMID: 24493052 DOI: 10.1002/adma.201303032] [Citation(s) in RCA: 128] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2013] [Indexed: 06/03/2023]
Abstract
Recyclable nanocatalysts of core-shell bimetallic nanocrystals are developed through polydopamine coating-directed one-step seeded growth, interfacial assembly, and substrate-immobilization of Au@Ag core-shell nanocrystals. This strategy provides new opportunities to design and optimize heterogeneous nanocatalysts with tailored size, morphology, chemical configuration, and supporting substrates for metal-catalyzed reactions.
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Affiliation(s)
- Jiajing Zhou
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 70 Nanyang Drive, Singapore, 637457
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95
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Chen J, Xiao P, Gu J, Han D, Zhang J, Sun A, Wang W, Chen T. A smart hybrid system of Au nanoparticle immobilized PDMAEMA brushes for thermally adjustable catalysis. Chem Commun (Camb) 2014; 50:1212-4. [DOI: 10.1039/c3cc47386d] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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96
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Catechol-functionalized microporous organic polymer as supported media for Pd nanoparticles and its high catalytic activity. POLYMER 2014. [DOI: 10.1016/j.polymer.2013.12.034] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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97
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Cao S, Chen J, Ge Y, Fang L, Zhang Y, Turner APF. A self-switchable Ag nanoreactor exhibiting outstanding catalytic properties. Chem Commun (Camb) 2014; 50:118-20. [DOI: 10.1039/c3cc47361a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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98
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Lv X, Zhu Y, Jiang H, Zhong H, Yang X, Li C. Au@TiO2 double-shelled octahedral nanocages with improved catalytic properties. Dalton Trans 2014; 43:15111-8. [DOI: 10.1039/c4dt02245a] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The gold@titanium dioxide octahedral nanocages (Au@TiO2) with a well-defined double-shelled structure with Au as the internal shell and TiO2 as the external shell exhibit excellent and stable activity for the catalytic reduction of 4-nitrophenol.
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Affiliation(s)
- Xiaoming Lv
- Key Laboratory for Ultrafine Materials of Ministry of Education
- School of Materials Science and Engineering
- East China University of Science and Technology
- Shanghai 200237, China
| | - Yihua Zhu
- Key Laboratory for Ultrafine Materials of Ministry of Education
- School of Materials Science and Engineering
- East China University of Science and Technology
- Shanghai 200237, China
| | - Hongliang Jiang
- Key Laboratory for Ultrafine Materials of Ministry of Education
- School of Materials Science and Engineering
- East China University of Science and Technology
- Shanghai 200237, China
| | - Hua Zhong
- Key Laboratory for Ultrafine Materials of Ministry of Education
- School of Materials Science and Engineering
- East China University of Science and Technology
- Shanghai 200237, China
| | - Xiaoling Yang
- Key Laboratory for Ultrafine Materials of Ministry of Education
- School of Materials Science and Engineering
- East China University of Science and Technology
- Shanghai 200237, China
| | - Chunzhong Li
- Key Laboratory for Ultrafine Materials of Ministry of Education
- School of Materials Science and Engineering
- East China University of Science and Technology
- Shanghai 200237, China
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99
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Gupta VK, Atar N, Yola ML, Üstündağ Z, Uzun L. A novel magnetic Fe@Au core-shell nanoparticles anchored graphene oxide recyclable nanocatalyst for the reduction of nitrophenol compounds. WATER RESEARCH 2014; 48:210-7. [PMID: 24112627 DOI: 10.1016/j.watres.2013.09.027] [Citation(s) in RCA: 329] [Impact Index Per Article: 32.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2013] [Revised: 08/02/2013] [Accepted: 09/13/2013] [Indexed: 05/19/2023]
Abstract
In this study, a novel catalyst based on Fe@Au bimetallic nanoparticles involved graphene oxide was prepared and characterized by transmission electron microscope (TEM), and x-ray photoelectron spectroscopy (XPS). The nanomaterial was used in catalytic reductions of 4-nitrophenol and 2-nitrophenol in the presence of sodium borohydride. The experimental parameters such as temperature, the dosage of catalyst and the concentration of sodium borohydride were studied. The rates of catalytic reduction of the nitrophenol compounds have been found as the sequence: 4-nitrophenol>2-nitrophenol. The kinetic and thermodynamic parameters of nitrophenol compounds were determined. Activation energies were found as 2.33 kcal mol(-1) and 3.16 kcal mol(-1) for 4-nitrophenol and 2-nitrophenol, respectively. The nanomaterial was separated from the product by using a magnet and recycled after the reduction of nitrophenol compounds. The recyclable of the nanocatalyst is economically significant in industry.
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Affiliation(s)
- Vinod Kumar Gupta
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, India.
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100
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Venkatakrishnan S, Veerappan G, Elamparuthi E, Veerappan A. Aerobic synthesis of biocompatible copper nanoparticles: promising antibacterial agent and catalyst for nitroaromatic reduction and C–N cross coupling reaction. RSC Adv 2014. [DOI: 10.1039/c4ra01126k] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Herein, we report the synthesis of copper nanoparticles at ambient conditions using biopolymer, pectin, as a protecting agent and hydrazine as a reducing agent.
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Affiliation(s)
- Showmya Venkatakrishnan
- Department of Chemistry
- School of Chemical and Biotechnology
- SASTRA University
- Thanjavur – 613 401, India
| | - Ganapathy Veerappan
- SKKU Advanced Institute of Nano Technology
- Sungkyunkwan University
- , South Korea
| | - Elangovan Elamparuthi
- Department of Chemistry
- School of Chemical and Biotechnology
- SASTRA University
- Thanjavur – 613 401, India
| | - Anbazhagan Veerappan
- Department of Chemistry
- School of Chemical and Biotechnology
- SASTRA University
- Thanjavur – 613 401, India
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