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Title: Silver-Copper Hollow Nanoshells as Phase-Transfer Reagents and Catalysts in the Reduction of 4-Nitroaniline

Authors:
 [1];  [1];  [1];  [1];  [1];  [1]
  1. Department of Chemistry and Biochemistry, University of California, 1156 High Street Santa Cruz CA 95064 USA
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1376751
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Particle & Particle Systems Characterization
Additional Journal Information:
Journal Volume: 34; Journal Issue: 8; Related Information: CHORUS Timestamp: 2017-08-24 07:20:48; Journal ID: ISSN 0934-0866
Publisher:
Wiley Blackwell (John Wiley & Sons)
Country of Publication:
Germany
Language:
English

Citation Formats

Chen, Limei, Hu, Peiguang, Peng, Yi, Lu, Jia En, Rojas-Andrade, Mauricio D., and Chen, Shaowei. Silver-Copper Hollow Nanoshells as Phase-Transfer Reagents and Catalysts in the Reduction of 4-Nitroaniline. Germany: N. p., 2017. Web. doi:10.1002/ppsc.201600358.
Chen, Limei, Hu, Peiguang, Peng, Yi, Lu, Jia En, Rojas-Andrade, Mauricio D., & Chen, Shaowei. Silver-Copper Hollow Nanoshells as Phase-Transfer Reagents and Catalysts in the Reduction of 4-Nitroaniline. Germany. doi:10.1002/ppsc.201600358.
Chen, Limei, Hu, Peiguang, Peng, Yi, Lu, Jia En, Rojas-Andrade, Mauricio D., and Chen, Shaowei. Tue . "Silver-Copper Hollow Nanoshells as Phase-Transfer Reagents and Catalysts in the Reduction of 4-Nitroaniline". Germany. doi:10.1002/ppsc.201600358.
@article{osti_1376751,
title = {Silver-Copper Hollow Nanoshells as Phase-Transfer Reagents and Catalysts in the Reduction of 4-Nitroaniline},
author = {Chen, Limei and Hu, Peiguang and Peng, Yi and Lu, Jia En and Rojas-Andrade, Mauricio D. and Chen, Shaowei},
abstractNote = {},
doi = {10.1002/ppsc.201600358},
journal = {Particle & Particle Systems Characterization},
number = 8,
volume = 34,
place = {Germany},
year = {Tue Feb 21 00:00:00 EST 2017},
month = {Tue Feb 21 00:00:00 EST 2017}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1002/ppsc.201600358

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  • An elegant method is used to prepare silver monoliths with Pluronic F-127(F-127) as sacrificial template by modified sol-gel method. Si nanoparticles (SiNPs) and graphene oxide (GO) are added in situ to Ag/F-127 hydrogel for the reduction of ο-nitroaniline (ο-NA) to 1, 2-benzenediamine. Fourier Transform Infrared Spectroscopy (FT-IR), Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), Thermogravimetric analysis (TGA), Raman Spectroscopy, Powder X-Ray Diffraction (PXRD) analysis and Brunauer-Emmett-Teller (BET) Nitrogen adsorption techniques were used for characterization of monoliths. An epoch-making catalytic activity of Ag/F-127/GO monoliths is observed in the reduction of ο-NA to 1, 2-benzenediamine in presence of NaBH{sub 4} inmore » aqueous media. The catalyst Ag/F-127/GO took only 2 min which is the minimum time reported so far with significant rate constant claimed itself a leading catalyst for the reduction of ο-NA to 1,2-benzenediamine. Pseudo first order rate constant (k) and Turn over frequency (TOF) values are 0.231 min{sup −1} and 30.053×10{sup 19} molecules min{sup −1} respectively suggest that the catalyst has industrial importance. Recyclability and stability of Ag/F-127/GO catalyst are studied successfully up to 10 cycles. Energy of activation (E{sub a}), and thermodynamic parameters viz. activation enthalpy (ΔH{sup ≠}), activation Gibbs free energy (ΔG{sup ≠}), and entropy of activation (ΔS{sup ≠}) were also ascertained. Catalytic activities of Ag/F-127, Ag/F-127/Dextran, Ag/F-127/Trimethylbenzene (TMB), Ag/F-127/SiNPs, and Ag/F-127/Si/GO monoliths were also studied. - Graphical abstract: Significant catalytic activities of silver monoliths against the reduction of ο-NA to 1,2 benzenediamine. - Highlights: • A new catalyst synthesized Ag/F-127/GO for the reduction of ο- NA to 1, 2- benzenediamine took only 2 min. • Turn over frequency of as synthesized catalyst was 30.053×10{sup 19} molecules min{sup −1} claimed itself a leading catalyst. • Recyclability of the catalyst was up to 10 cycles. • The synthesis is non toxic, economically viable and environmentally benign.« less
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