Highly efficient core-shell Ag@carbon dot modified TiO2nanofibers for photocatalytic degradation of organic pollutants and their SERS monitoring

被引：18

作者：

Jin, Jing ^{[1
]}

Song, Wei ^{[1
]}

Zhang, Ning ^{[1
]}

Li, Linjia ^{[1
]}

Liu, Hao ^{[1
]}

Yang, Bai ^{[1
]}

Zhao, Bing ^{[1
]}

机构：

[1] Jilin Univ, State Key Lab Supramol Struct & Mat, Changchun 130012, Peoples R China

来源：

RSC ADVANCES | 2020年 / 10卷 / 45期

基金：

中国国家自然科学基金;

关键词：

ENHANCED RAMAN-SCATTERING; SURFACE; NANOPARTICLES; NANOFIBERS; COMPOSITE; FABRICATION; GENERATION; SUBSTRATE; WATER; CO2;

D O I：

10.1039/d0ra00168f

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In the present study, a novel hybrid nanomaterial composed of core-shell structured Ag@carbon dot (CD) modified TiO(2)nanofibers (NFs) was successfully fabricatedviaa simple two-step strategy for the first time. Herein, the Ag@CDs-TiO(2)NFs are demonstrated to be an efficient SERS substrate. The strong LSPR-induced electromagnetic enhancement (EM) by Ag@CDs NPs and efficient charge transfer (CT) effect between Ag@CDs and TiO(2)NFs synergistically contribute to the excellent SERS enhancement. In addition, the Ag@CDs-TiO(2)NFs exhibit enhanced photocatalytic activity regarding the organic pollutant degradation under visible light irradiation because of the enhanced light absorption and improved separation of photo-generated electron-hole pairs. Thus, this new nanocomposite can be used as a sensitive SERS substrate for determining the catalytic activity and reaction kinetics during the photodegradation of methylene blue (MB). Compared with UV-vis spectroscopy, the SERS technique enables more accurate monitoring of the changes of adsorption molecules and actual catalytic process on the surface of the catalyst. These results are significant for the development of metal or semiconductor-based catalysts for ensuring optoelectronic, energy and environmental applications.

引用

页码：26639 / 26645

页数：7

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