Preparation of Ag2O/TiO2 nanocomposites by two-step method and study of its degradation of RHB

In order to solve the most difficult organic matter pollution in the water pollution problem, we successfully prepared a sample Ag2O/TiO2 heterojunction nanocomposite material using a two-step method, and used this material to test the degradation of rhodamine B (RhB). Compared with pure Ag2O and pure TiO2, Ag2O/TiO2 composites have improved degradation rate of RhB and enhanced photocatalytic activity under ultraviolet and visible light irradiation. Through SEM, UV-visible diffuse reflection, XPS and other characterizations, it can be seen that Ag2O nanoparticles are deposited on the inner and outer surfaces of TiO2 nanotubes, the absorption range of the sample has been significantly widened, and the heterojunction structure has been successfully constructed. These conclusions have a positive effect on the photocatalytic degradation of the sample. (C) 2020 Elsevier B.V. All rights reserved.