Photocatalytic activities of contaminants by Bi2WO6-graphene composites decorated with mesoporous silica

摘要

This work reports a self-assembly method for preparing a composite of Bi2WO6-graphene and ordered mesoporous to form a novel ternary SiO2/Bi2WO6-graphene material. The successful synthesis was confirmed by physical tests such as XRD, SEM, TEM, EDX, XPS, DRS, Raman, and Galvano cyclic voltammetry. Moreover, the mesoporous structure of the obtained material was demonstrated by nitrogen adsorption/desorption isotherms. The investigations imply that the Bi2WO6-graphene composite was grown on an ordered mesoporous structure of the silica in a basic medium and the structure was modified with a cetyltrimethylammonium bromide surfactant. The photocatalytic activity was investigated in terms of photodegradation of cationic-anionic organic dye groups and the photocatalytic performance of gallic acid under visible light irradiation. The achieved results showed that the ternary SiO2/Bi2WO6 catalyst holds promise to become a new potential photocatalyst for the enhancement of photocatalytic activities. (C) 2018 Elsevier B.V. All rights reserved.