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Enhanced visible light photocatalytic activity of Cl‐Bi 2 WO 6 / g‐C 3 N 4 composite photocatalyst
Author(s) -
Gao Yanhua,
Yang Wei,
Shan Xinyao,
Chen Ying
Publication year - 2021
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.23891
Subject(s) - photocatalysis , x ray photoelectron spectroscopy , high resolution transmission electron microscopy , materials science , scanning electron microscope , heterojunction , visible spectrum , nuclear chemistry , catalysis , composite number , degradation (telecommunications) , substrate (aquarium) , transmission electron microscopy , analytical chemistry (journal) , chemical engineering , nanotechnology , chemistry , optoelectronics , organic chemistry , composite material , telecommunications , oceanography , geology , computer science , engineering
In this paper, ultra‐thin g‐C 3 N 4 nanosheets were prepared by improved ultrasonic stripping method for the first time. Then, g‐C 3 N 4 nanosheets were pretreated into Bi + /g‐C 3 N 4 nanosheets by electrostatic adsorption principle, and a new type of Cl‐Bi 2 WO 6 /g‐C 3 N 4 heterostructure photocatalyst was prepared by using Bi + /g‐C 3 N 4 nanosheets as the substrate. The degradation of RhB under photocatalysis was studied with the compound amount of g‐C 3 N 4 and the amount of catalyst by using x‐ray diffraction (XRD), a scanning electron microscope (SEM), high‐resolution transmission electron microscopy (HRTEM), x‐ray photoelectron spectroscopy (XPS), Brunauer Emmett‐Teller (BET), and ultraviolet visible diffuse (UV‐vis DRS) methods on the structure, morphology, and optical characterization charge transfer characteristics, etc. The results of the degradation experiment show that the compound appropriate amount of g‐C 3 N 4 can significantly improve the activity of the photocatalyst. At the same time, different amounts of Cl‐Bi 2 WO 6 /g‐C 3 N 4 composite photocatalyst have a significant effect on the degradation performance, and the photocatalytic activity is the best when the input is 2 g/L. Combined with active species capture experiments, a possible degradation mechanism of Cl‐Bi 2 WO 6 /g‐C 3 N 4 Z‐type heterostructure photocatalyst was proposed.