Water-phase strategy for synthesis of TiO2–graphene composites with tunable structure for high performance photocatalysts

摘要: Abstract The controllable synthesis of strongly coupled TiO2/graphene composites has been a long-standing challenge for developing advanced photocatalysts. Here, we report facile water-phase protocol TiO2–graphene using GO aqueous suspension and TiO2 nanosols as precursors. By controlling the ratio to TiO2, both high-/low-dense nanoparticles across graphene graphene–TiO2–graphene sandwich structured are successfully achieved through electrostatic attraction between negatively charged nanosheets positively nanosols. show an enhanced photocatalytic activity degradation methylene blue (MB) under UV light. Interestingly, composite exhibits best highest photocurrent density, which is 12.2 35.46 times that pure respectively. outstanding likely due following two reasons, two-channel electron conduction path graphene, well better adsorption capability MB molecule.