文献类型：期刊文献

英文题名：Highly efficient reusable catalyst based on silicon nanowire arrays decorated with copper nanoparticles

作者：Yang, Xiaoling[1];Zhong, Hua[1];Zhu, Yihua[1];Jiang, Hongliang[1];Shen, Jianhua[1];Huang, Jianfei[1];Li, Chunzhong[1]

机构：[1]E China Univ Sci & Technol, Key Lab Ultrafine Mat, Minist Educ, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2014

卷号：2

期号：24

起止页码：9040

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY A

收录：;EI(收录号：20142317785527);WOS:【SCI-EXPANDED(收录号:WOS:000336850600013)】；

基金：This work was supported by the National Natural Science Foundation of China (21236003, 21206042, 20925621, and 21176083), the Basic Research Program of Shanghai (13NM1400700, 13NM1400701), and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Catalyst activity - Sodium Borohydride - Nanowires - Silicon - Aromatic compounds - Solutions - Cost effectiveness - Metal nanoparticles - Substitution reactions - Copper

摘要：Non-noble metal copper (Cu) nanoparticles (NPs) with controlled size and surface coverage are decorated on silicon nanowire arrays (SiNWAs) by a simple galvanic displacement reaction. Using the combined efforts of all these approaches, SiNWAs-supported Cu NPs (SiNWAs-Cu) exhibit excellent and stable activity for the catalytic reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) by sodium borohydride (NaBH4) in an aqueous solution, which can be recycled for five successive cycles of the reaction with a conversion efficiency of more than 95%. This novel catalyst also shows excellent catalytic performance for the degradation of other organic dyes, such as methylene blue (MB) and rhodamine B (RhB). Additionally, we demonstrate that the catalytic activity of SiNWAs-Cu is comparable to other SiNWAs-supported noble metal NPs (i.e., Ag and Au). Furthermore, SiNWAs as powerful substrates can be reused for decorating with Cu NPs after dilute HNO3 treatment. SiNWAs-Cu is particularly attractive as a catalyst, although Cu is orders of magnitude cheaper than any noble metals, its catalytic performance is comparable to other noble metals. So SiNWAs-Cu is thus expected to have the potential as a highly efficient, cost-effective and eco-friendly reusable catalyst to replace noble metals for certain catalytic applications.