▎ 摘　　要

The nanosheet flower-shaped rGO-Ag2O/TiO2 (rAT) ternary composite material was prepared by two-step hydrothermal and one-step wet chemical co-precipitation methods. In the first step, anatase titanium dioxide (TiO2) with a nano-flaky flower-like structure was prepared by a hydrothermal method. In the second step, the graphene-coated TiO2 structure was prepared by the hydrothermal method to form rGO-TiO2 (rT) composite material. In the third step, a simple wet chemical co-precipitation method was used to prepare the graphenecoated Ag2O/TiO2 (AT) nanostructure to form an rAT ternary composite material. The rAT was placed under UV-visible light to degrade Rhodamine B (RhB) solution. It is concluded that within 70 min, the degradation rate of the 10 mg rAT ternary composite material is as high as 92.3%. The result showed that the rAT had an excellent photocatalytic performance. The main reason was that the three materials of rGO, Ag2O, and TiO2 had particularities in morphology, structure, and performance. TiO2 had a layered flake flower-like structure, Ag2O had the characteristics of the narrow bandgap and excellent dispersion, and rGO had a unique two-dimensional network structure. It was further found that in terms of design ideas and preparation methods, the rAT ternary composite photocatalyst will provide a new vision and brilliant prospect for photocatalytic materials.