▎ 摘　　要

NOVELTY - Preparing graphene/nano-titanium dioxide composites, comprises: dispersing nano-titanium dioxides (500-10000 part-by-weight) and graphenes (1 part-by-weight) in a water/ethanol solution at a volume ratio of 2:1-3:1; and allowing the nano-titanium dioxides and graphenes within the dispersion to react at a pressure of 10-15 MPa and at a temperature of 100-200 degrees C. USE - The method is useful for preparing graphene/nano-titanium dioxide composites. ADVANTAGE - The method: utilizes nano-titanium dioxides which exhibit better photocatalytic degradation efficiency; and provides composites having greater surface area, and thus the ability of the composite material for absorbing the pollutants is increased. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for the graphene/nano-titanium dioxide composites containing essentially 500:1-10000:1 or essentially 1000:1 of nano-titanium dioxides and graphenes, where the surface of at least a portion of the graphenes are oxidized.