摘要
Constructing a heterojunction photocatalyst is a significant method to enhance photocatalytic activity because it can promote the separation of photogene rated carriers.Herein,amorphous/crystalline contact Bi_(2)S_(3)/Bi_(4)0_(7) heterostructure was successfully synthesized by in-situ sulfidation of Bi407.The amorphous Bi_(2)S_(3) is diffused on the surface of Bi_(4)0_(7) rod,enhancing the visible light response and improving the transport of photogene rated carriers.Various characterizations confirm that the rapid separation of photogene rated carriers leads to increased photocatalytic performance.The optimized Bi_(2)S_(3)/Bi_(4)O_(7) heterostructure photocatalyst(BiS-0.15) exhibits the highest Cr(Ⅵ) reduction(0.01350 min^(-1)) and RhB oxidation(0.08011 min^(-1)) activity,which is much higher than that of pure Bi_(4)0_(7) and mixture under visible light irradiation.This work provides new insights into the construction of efficient novel photocatalysts.
基金
supported by the National Natural Science Foundation of China (Nos.51808250,51676082)
the Natural Science Foundation of Jiangsu Province of China (Nos.BK20160430,BK20181070)
the Jiangsu Planned Projects for Postdoctoral Research Funds of China (No.1601179C)
the Project Funded by China Postdoctoral Science Foundation (Nos.2016M591757,2017M610336)
Jiangsu Key Research and Development (R&D) Projects (Social Development,No.BE2020772)。
