Ag纳米粒子改性MoS2／暴露（001）面TiO2二维复合材料及其可见光催化性能研究

第 48 卷第 1 期		Vol. 48 No. 1
2018 年 2 月		Feb 2018

所属栏目：功能材料

Ag纳米粒子改性MoS2／暴露（001）面TiO2二维复合材料及其可见光催化性能研究

王芬，沈嘉琪，陈丽宇，李晋波* （长沙学院生物与环境工程学院，湖南长沙 410082）

摘　要：以钛酸四丁酯、氢氟酸、钼酸钠、硫代乙酰胺和硝酸银为原料，利用水热法和光沉积法成功在二硫化钼（MoS2）／暴露（001）面TiO2二维复合材料上沉积了银纳米粒子（Ag）。采用X射线衍射（XRD）、扫描电子显微镜（SEM）、X射线光电子能谱（XPS）、紫外可见吸收（UV-vis）对样品的相组成、表面形貌、表面元素组成和光响应范围进行表征测试，并在可见光下考察了复合材料降解亚甲基兰（MB）的光催化性能。结果表明粒径约为20～30 nm的Ag颗粒成功负载在MoS2／暴露（001）面的TiO2纳米片上（MT-001），Ag纳米粒子的等离子共振效应有效的改善了MT-001纳米片的光催化性能，改性后复合材料对MB的最佳降解率为89.72%，为同等条件下纯TiO2纳米片的1.55倍。

关键词：等离子共振；Ag／MoS2／暴露（001）面TiO2；可见光催化

中图分类号：O643　　文献标识码：A　　文章编号：1009-9212（2018）02-0057-04

Ag Nanoparticle Modified MoS2@TiO2(001) Ternary Composite for Enhanced Visible-light Driven Photocatalytic Activity

WANG Fen, SHENG Jia-qi, CHEN Li-yu, LI Jin-bo* (Changsha Institute Department of biology and environment,Changsha 410082, China)

Abstract：An Ag nanoparticle-modified MoS2@TiO2 (001) ternary composite (Ag-MT-001) was successfully fabricated by ahydrothermal and photodeposition methods. The microstructure and composition of the composite materials were characterized by XRD, TEM and XPS. TEM results showed that the composite consisted of well-defined sheet-shaped structures with a rectangular outline and a length of approximately 80~150 nm. Ag nanoparticles (20~30 nm) were dispersed on the surface of TiO2 nanosheets with (001) facets (T-001). XPS results demonstrated that the MoS2 coated on the surface of T-001 and AgNO3 was successfully reduced to Ag nanoparticles. The UV-visible spectrum of the ternary composite revealed strong absorption in the visible light region, a result that was attributed to the surface plasmon resonance (SPR) of Ag nanoparticles and MoS2 in the composites. The photocatalytic activity of the ternary composite was estimated by the photocatalytic degradation of methylene blue (MB) under visible-light irradiation. Ag-MT-001 exhibited high performance.

Key words：plasmon resonance; MoS2@TiO2 (001); visible light catalysis

基金项目：2017年湖南省大学生研究性学习与创新实验计划项目，长沙市科技计划项目（K1705059）。

作者简介：王芬（1997-），男，湖南湘潭人，研究方向：纳米材料制备（E-mail: 876774932@qq.com）。

联系人：李晋波，讲师，研究方向：纳米材料制备，光催化（E-mail: 38455837@qq.com）。

收稿日期：2018-02-19