▎ 摘　　要

In this study, TiO2/graphene nanohybrids with various TiO2/graphene molar ratio were fabricated by using a modified sol-gel method. The morphology, structure and optical properties of the nanohybrids were fully characterized. Research and experiment results show that: in the visible light region, this material possesses better E. coli decomposition capability compared to pure TiO2; and that C-O-Ti bonds have formed within the material, thus decreasing its electron-hole recombination rate. The optimal molar ratio between TiO2 and graphene for photocatalytic activity in the degradation of E. coli was found to be 1/1. Our experimental data were further confirmed by DFT calculation with a good agreement. (C) 2020 Published by Elsevier B.V.