文献类型：期刊文献

英文题名：Synthesis of yolk-shell Fe3O4@void@CeO2 nanoparticles and their application in SERS

作者：Zheng, Xinlu[1];Zhang, Weiwei[1];Zhang, Jinlong[1];Wang, Lingzhi[1]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Key Lab Adv Mat & Feringa Nobel Prize Scientist J, Inst Fine Chem, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2021

卷号：541

外文期刊名：APPLIED SURFACE SCIENCE

收录：;EI(收录号：20204809525754);WOS:【SCI-EXPANDED(收录号:WOS:000608495100007)】；

基金：This work was supported by the National Natural Science Foundation of China (21673073, 21677048 and 5171101651), the Science and Technology Commission of Shanghai Municipality (16JC1401400, 17520711500) and the Fundamental Research Funds for the Central Universities (222201717003).

语种：英文

外文关键词：Yolk-shell nanostructure; Magnetic materials; Photocatalyst; CeO2; Surface-enhanced Raman scattering

摘要：Yolk-shell (YS) Fe3O4@void@CeO2 was alkaline-etched from Fe3O4@SiO2@CeO2 and applied as a magnetically recyclable SERS substrate. Using methylene blue (MB) as the analyte model, high SERS sensitivity was revealed with an enhanced factor of 1.1 x 10(4). The enhanced light-scattering ability of the YS structure plays a vital role in the high SERS activity. Moreover, the improved molecule adsorption benefitting from the more exposed surface partly contributes to the improved Raman signal. The composite can be conveniently recycled through magnetic separation and light irradiation due to the photocatalytic degradation of MB molecules by CeO2.