Facile synthesis of Sb2WO6 with gradient oxygen vacancies for high photocatalytic activity
Jun Zhang,
Yu Cui,
Yi Lin,
Yalu Tang,
Yanlong Yu,
Sai Yan,
Benling Gao,
Paul K. Chu
Affiliations
Jun Zhang
Faculty of Mathematics and Physics, Huaiyin Institute of Technology, Huaian 223003, China
Yu Cui
Faculty of Mathematics and Physics, Huaiyin Institute of Technology, Huaian 223003, China
Yi Lin
Faculty of Mathematics and Physics, Huaiyin Institute of Technology, Huaian 223003, China
Yalu Tang
Faculty of Mathematics and Physics, Huaiyin Institute of Technology, Huaian 223003, China
Yanlong Yu
Faculty of Mathematics and Physics, Huaiyin Institute of Technology, Huaian 223003, China
Sai Yan
Faculty of Mathematics and Physics, Huaiyin Institute of Technology, Huaian 223003, China
Benling Gao
Faculty of Mathematics and Physics, Huaiyin Institute of Technology, Huaian 223003, China
Paul K. Chu
Department of Physics, Department of Materials Science and Engineering, and Department of Biomedical Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China
The Sb2WO6 photocatalyst is synthesized by introducing oxygen vacancies through acetylene annealing. The number of oxygen vacancies can be adjusted by varying the annealing duration. Oxygen vacancy defects in Sb2WO6 change the surface chemical properties, enhance the separation of carriers, broaden the absorption of visible light, and activate the catalytic sites, resulting in overall enhancement of the photocatalytic properties. The significance of surface oxygen vacancies and pertinent mechanisms of photocatalytic oxidation are described. Our results reveal a promising method to improve the properties of Sb2WO6-based materials for applications such as the treatment of wastewater.
