Two-dimensional assembly structure of graphene and TiO2 nanosheets from titanic acid with enhanced visible-light photocatalytic performance

Abstract The titanic acid sheets were prepared by one-step hydrazine hydrate-assisted hydrothermal process. Then the reduced graphite oxide (rGO)@TiO 2 nanosheet composites were finally obtained through ultrasonic exfoliation and following calcination treatment process. rGO@TiO 2 nanosheet composites show excellent hydrogen production performance under AM1.5 light source. The highest hydrogen evolution yield (923.23 μmol) is nearly two times higher than that of pure TiO 2 , mainly due to the special electron structure and more active sites for TiO 2 nanosheet. The introduction of graphene could improve the TiO 2 nanosheet stability and extend visible-light absorption range.