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DeNovo Synthesis of Gold-Nanoparticle-Embedded, Nitrogen-Doped Nanoporous Carbon Nanoparticles (Au@NC) with Enhanced Reduction Ability
Title: | DeNovo Synthesis of Gold-Nanoparticle-Embedded, Nitrogen-Doped Nanoporous Carbon Nanoparticles (Au@NC) with Enhanced Reduction Ability |
Authors: | Liao, Yu-Te Browse this author | Chen, Jeffrey E. Browse this author | Isida, Yohei Browse this author | Yonezawa, Tetsu Browse this author →KAKEN DB | Chang, Wei-Chen Browse this author | Alshehri, Saad M. Browse this author | Yamauchi, Yusuke Browse this author | Wu, Kevin C. -W. Browse this author |
Keywords: | gold | nanoparticles | nanoporous carbon | reduction | zeolitic imidazolate framework-8 |
Issue Date: | 6-Feb-2016 |
Publisher: | Wiley-Blackwell |
Journal Title: | ChemCatChem |
Volume: | 8 |
Issue: | 3 |
Start Page: | 502 |
End Page: | 509 |
Publisher DOI: | 10.1002/cctc.201501020 |
Abstract: | A denovo synthesis of gold-nanoparticle-embedded, nitrogen-doped nanoporous carbon nanoparticles (Au@NC) was investigated in this work. Chloroauroic acid was encapsulated inside zeolitic imidazolate framework-8 (ZIF-8) nanoparticles during the synthesis and later reduced into gold nanoparticles. The as-synthesized gold-nanoparticle-embedded ZIF-8 (Au@ZIF-8) was then carbonized into Au@NC to enhance the stability of the nanoporous support. The results show that Au@NC exhibits a porous structure containing 3wt% of gold. 2-Methylimidazole provided an abundant amount of nitrogen (19wt%) on the carbon matrix, which resulted in a hydrophilic and positively charged surface that is useful for the reduction of 4-nitrophenol. The results of the catalytic reaction indicate that synthesized Au@NC could act as an effective catalyst with a turnover frequency (TOF) of 1185g(-1)s(-1), which is higher than that of conventional naked Au nanoparticles (TOF: 339g(-1)s(-1)) and that of Au nanoparticles on activated carbon (TOF: 89g(-1)s(-1)). We propose that the enhanced performance of Au@NC resulted from homogeneous distribution of Au nanoparticles along with the hydrophilic and positively charged nitrogen-doped carbon surface. |
Rights: | This is the accepted version of the following article: DeNovo Synthesis of Gold-Nanoparticle-Embedded, Nitrogen-Doped Nanoporous Carbon Nanoparticles (Au@NC) with Enhanced Reduction Ability. ChemCatChem, 8(3):502-509.,which has been published in final form at http://dx.doi.org/10.1002/cctc.201501020. |
Type: | article (author version) |
URI: | http://hdl.handle.net/2115/64467 |
Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 米澤 徹
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