Enhanced visible light photocatalytic activity of Cl‐Bi2WO6/g‐C3N4 composite photocatalyst

Abstract

AbstractIn this paper, ultra‐thin g‐C3N4 nanosheets were prepared by improved ultrasonic stripping method for the first time. Then, g‐C3N4 nanosheets were pretreated into Bi+/g‐C3N4 nanosheets by electrostatic adsorption principle, and a new type of Cl‐Bi2WO6/g‐C3N4 heterostructure photocatalyst was prepared by using Bi+/g‐C3N4 nanosheets as the substrate. The degradation of RhB under photocatalysis was studied with the compound amount of g‐C3N4 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‐C3N4 can significantly improve the activity of the photocatalyst. At the same time, different amounts of Cl‐Bi2WO6/g‐C3N4 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‐Bi2WO6/g‐C3N4 Z‐type heterostructure photocatalyst was proposed.