摘要： The threat of environmental microbial contamination to the health of human beings has arisen particular attention. In order to explore the synergistic effect of photocatalytic and photothermal process to the antibacterial property, a stably combined BiOI-graphene oxide (GO) nanocomposite was constructed and prepared through a facile solvothermal method. BiOI crystals were uniformly distributed on the GO nanosheets by the formation of Bi-C bond. Based on the various characterizations, the great surface area, the high light harvesting with extension into NIR region and the efficient transfer of photo-induced electrons by the conductivity of GO was demonstrated, which was beneficial for the photocatalytic antibacterial activity. More importantly, the photothermal effect of GO raise the temperature of BiOI-GO composite with high photothermal conversion efficiency and induced the photo-generated electrons from BiOI crystals to obtain more energy and higher carrier mobility. Conversely, the temperature elevation of BiOI-GO composite improved its capability of light absorption and separation of photo-induced charges. As a result, BiOI-GO composite presented the synergistic photocatalytic-photothermal effect to the improvement of antibacterial property for Acinetobacter baumannii with the higher efficiency of TOC removal and leakage of K+ ions, in comparison to the individual photocatalytic process. Thus, the synergistic photocatalytic-photothermal contribution of BiOI-GO composite will provide a significance for the potential application of environmental disinfection in the future.