▎ 摘　　要

Cocatalyst modification is an effective way to promote the separation of photogenerated electron-hole pairs. The reduced graphene oxide (rGO) with high electron transfer rate and the amorphous Ti(IV) compounds as hole co-catalyst were loaded on the surface of highly-efficient and flake-like Bi2WO6 nanoparticles by a hydrothermal-impregnation method to prepare Ti(IV)-rGO/Bi2WO6 visible-light-driven photocatalyst. It was found that the Ti(IV) and rGO single-cocatalyst modified Bi2WO6 exhibited an enhanced photocatalytic activity and dual-cocatalyst modified Bi2WO6 photocatalyst showed higher photocatalytic performance than single-cocatalyst modified Bi2WO6. When the amount of Ti(IV) was 5wt%, the photocatalytic rate constant of Ti(IV)-rGO/Bi(2)WO(6)photocatalyst reached 2.2x10(-2) min(-1), which was 88-fold higher than that of bare Bi2WO6. The enhancement of photocatalytic performance mainly depends on the synergistic effect of novel Ti(IV)-hole cocatalyst and rGO-electron cocatalyst, namely, Ti(IV) compounds rapidly transfer the photogenerated holes, while rGO rapidly capture the photogenerated electrons. The present amorphous Ti(IV) and rGO cocatalysts can be widely applied in the design and development of highly efficient cocatalyst-modified photocatalytic materials.