In-situ hydrothermal synthesis of TiO2/Bi2WO6 heterojunction with enhanced photocatalytic activity

被引：30
|
作者：
Li, Wenqi [1 ]
Ding, Xingeng [1 ,2 ]
Wu, Huating [1 ]
Yang, Hui [1 ,2 ]
机构：
[1] Zhejiang Univ, Sch Mat Sci & Engn, Hangzhou 310027, Zhejiang, Peoples R China
[2] Zhejiang Calif Int Nano Syst Inst, Hangzhou 310027, Zhejiang, Peoples R China
来源：
MATERIALS LETTERS | 2018年 / 227卷
关键词：
Semiconductors; Composite materials; Microstructure; Optical materials and properties; VISIBLE-LIGHT; IRRADIATION;
D O I：
10.1016/j.matlet.2018.05.107
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Highly dispersed TiO2-modified Bi2WO6 microflowers were synthesized by using the hydrothermal method. The morphology and structure of as-prepared samples were characterized by SEM, TEM, EDS, XRD, Raman, UV-vis DRS, and TR-PL spectra. The heterostructured TiO2/Bi2WO6 exhibits a higher photocatalytic activity than pure TiO2 and Bi2WO6 under visible and UV-vis light irradiation. In addition, the recycling experiments indicate that TiO2/Bi2WO6 is excellent stability even after 5 five cycling runs. TR-PL spectra confirm that the coupling of Bi2WO6 with TiO2 significantly prolongs the lifetime of charge carriers. The enhanced photocatalytic activity of TiO2/Bi2WO6 is mainly attributed to the optimized band-gap and heterojunction, which absorb more visible light and prolong the carrier lifetime. (C) 2018 Elsevier B.V. All rights reserved.
引用
收藏
页码：272 / 275
页数：4
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