Oxygen vacancy regulation in Nb-doped BiWO for enhanced visible light photocatalytic activity

Novel Nb-doped Bi 2 WO 6 nanosheets have been successfully synthesized by a simple hydrothermal method. XRD, Raman spectra, XPS and SEM were adopted to analyze the structure and morphology of the samples, then the structure-dependent optical properties, photoelectric behavior and photocatalytic acti...

Full description

Saved in:
Bibliographic Details
Published in:RSC advances 2019-07, Vol.9 (39), p.22559-22566
Main Authors: Chen, Hao, Zhang, Changteng, Pang, Ya, Shen, Qianhong, Yu, Yang, Su, Yuxuan, Wang, Jiabang, Zhang, Fang, Yang, Hui
Format: Article
Language:
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Novel Nb-doped Bi 2 WO 6 nanosheets have been successfully synthesized by a simple hydrothermal method. XRD, Raman spectra, XPS and SEM were adopted to analyze the structure and morphology of the samples, then the structure-dependent optical properties, photoelectric behavior and photocatalytic activities were investigated, and the structure-property relationship was also discussed. The results show that doping Nb 5+ can increase the oxygen vacancies in the Bi 2 WO 6 lattice and reduce the optical band gap of Bi 2 WO 6 . The oxygen vacancies also act as electron traps, which promote the separation of photogenerated carriers. Hence, compared with the pure Bi 2 WO 6 , the as-prepared Nb-doped Bi 2 WO 6 nanosheets exhibit enhanced visible-light photocatalytic activity for removing contaminants in water such as rhodamine B and tetracycline. Novel Nb-doped Bi 2 WO 6 nanosheets have been successfully synthesized by a simple hydrothermal method.
ISSN:2046-2069
DOI:10.1039/c9ra02862e