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

页码：272 / 275

页数：4

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