文献类型：期刊文献

英文题名：Au-CuxOy Nanoparticles Encapsulated in Hollow Porous Silica Nanospheres as Efficient Catalysts for Nitrophenol Reduction

作者：Liu, Dong[1];Wang, Zizhu[1];Ma, Yirui[1];Xu, Caiyun[1];Zhou, Shenghu[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, Shanghai Key Lab Multiphase Mat Chem Engn, Shanghai 200237, Peoples R China

年份：2023

卷号：6

期号：1

起止页码：461

外文期刊名：ACS APPLIED NANO MATERIALS

收录：;EI(收录号：20225213316962);WOS:【SCI-EXPANDED(收录号:WOS:000904685200001)】；

基金：? ACKNOWLEDGMENTS This work was financially supported by the National Natural Science Foundation of China (grant nos. 22078099 and 21776090) .

语种：英文

外文关键词：catalytic reduction; Au-CuxOy; nitrophenols; hollow nanospheres; synergistic effect

摘要：In this work, Au-CuxOy hybrid nanoparticle-encapsulated hollow porous silica nanospheres (Au-CuxOy in HPSNs) were synthesized by immobilizing the catalytic functionality inside hollow cavities by using polyethyleneimine in a reverse microemulsion system as the void template as well as the platform to deliver the metals into the central voids. Compared with individual Au in HPSNs and CuxOy in HPSNs, the prepared Au-CuxOy in HPSNs demonstrate significantly improved catalytic efficiency for the reduction of various nitrophenols with NaBH4. At the molar ratio of 4-nitrophenol/Au of 30/1, the 4nitrophenol conversions over Au-CuxOy in HPSNs reach 100% within 5.5 min, and catalytic efficiency is maintained during five cycles of catalytic reactions. The enhanced performance can be ascribed to the synergistic effect between Au and CuxOy, and the protection of silica shells to inner Au-CuxOy improve their catalytic stability.