文献类型：期刊文献

英文题名：In-situ SERS monitoring of reaction catalyzed by multifunctional Fe3O4@TiO2@Ag-Au microspheres

作者：Shen, Jianhua[1];Zhou, Ying[1];Huang, Jianfei[1];Zhu, Yihua[1];Zhu, Jingrun[1];Yang, Xiaoling[1];Chen, Wei[1];Yao, Yifan[1];Qian, Shaohong[2];Jiang, Hao[1];Li, Chunzhong[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Minist Educ, Shanghai 200237, Peoples R China;[2]Fudan Univ, Dept Ophthalmol, EENT Hosp, 83 Fenyang Rd, Shanghai 200031, Peoples R China

年份：2017

卷号：205

起止页码：11

外文期刊名：APPLIED CATALYSIS B-ENVIRONMENTAL

收录：;EI(收录号：20165103133641);WOS:【SCI-EXPANDED(收录号:WOS:000393931000002)】；

基金：This work was supported by the National Natural Science Foundation of China (21322607, 21406072, 21471056, 21676093 and 91534202), Program for New Century Excellent Talents in University (NCET-13-0796), Shanghai Educational Development Foundation (14CG29), the Basic Research Program of Shanghai (14JC1406402, 15JC1401300), Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning, the International Science and Technology Cooperation Program of China (2015DFA51220) and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Multifunctional microspheres; Ag-Au bimetallic nanostructures; Noble metal catalyst; Surface-enhanced Raman scattering; Finite-difference time-domain

摘要：Multifunctional Fe3O4@TiO2@Ag-Au microspheres (MS) were synthesized by grafting Ag nanoparticles onto 3-Aminopropyltrimethoxysilane (APTMS) modified Fe3O4@TiO2 MS, followed by galvanic replacement approach to fabricate Ag-Au bimetallic nanostructures with variable bimetallic molar ratios. The composite with Au-to-Ag ratio of 1:1 exhibits optimal catalytic activity for reduction of 4-nitrophenol (4-NP). Furthermore, finite-difference time-domain (FDTD) simulation study shows that incorporating Au-Ag bimetallic nanostructures onto Fe3O4@TiO2 MS significantly increases the effect of the 'hot spot', offering stronger electromagnetic field enhancements. Indeed, the Fe3O4@TiO2@Ag-Au was demonstrated to be an excellent substrate material for in-situ surface-enhanced Raman scattering (SERS) monitoring of the reaction process. Combined with its good magnetic and photocatalytic performance allowing facile recovery, Fe3O4@TiO2@Ag-Au MS shows great potential for multifunctional platform for simultaneous catalysis and in-situ reaction monitoring. (C) 2016 Elsevier B.V. All rights reserved.