To date, many fundamental questions still remain to be answered regarding the integration of TiO2–GO with membrane processes. For example, it is unknown whether and how TiO2–GO can be advanta- geously employed to synthesize a sunlight-active photocatalytic membrane for water-contaminant separation. Besides, it is highly desirable to develop a simple yet efficient synthesis approach to advance the photocatalytic membrane technology. In the mean- time, basic properties of the TiO2–GO membrane, including the light-response range and photodegradation kinetics, have not been experimentally characterized in any previous studies. There- fore, a systematic study is needed to synthesize and characterize the TiO2–GO membrane as well as to elucidate the underlying photocatalytic mechanisms.