▎ 摘　　要

Inhibiting the recombination of electron-hole pairs of TiO2-based photocatalysts to enhance the photocatalytic activities received continuous attention in the past decades. Herein, a ternary composite of TiO2/UiO-66-NH2/graphene oxide was designed to facilitate the photoelectrons transfer. When -NH2 was grafted, graphene oxide was introduced by 0.05 g and Ti/Zr molar ratio of the composite was 19, the composite exhibited enhanced photocatalytic performance in a period of 45 min dye removing tests (degrading rate over 97%) and a significant improvement (H-2 evolution rate 0.27 mmol/h in 2 h) in hydrogen evolution tests. Furthermore, in the reversibility test, the composite could maintain high dye degrading efficiency (over 88%) after five cycles and the apparent quantum efficiency reach 8.04% in 12-h H-2 evolution test which means electron-holes recombination was efficiently inhibited and the structure of the composite was relatively stable. Schematic diagram of the enhanced photocatalytic mechanism over the ternary TiO2/UiO-66-NH2/GO composites. [GRAPHICS]