▎ 摘　　要

A novel rod-shape BaNiSn-Graphene oxide decorated TiO2 composite (BaNiSn-GT) has been synthesized using a simple ultrasonic method to enhance the visible-light-driven H-2 evolution with cationic scavengers. The unique structure between the interfaces of BaNiSn-Graphene and TiO2 provides graphene oxide of contact and excellent electron transfer for H-2 evolution activity. The BaNiSn-GT ternary photocatalyst exhibits relatively high photocatalytic activity with a hydrogen evolution rate of 1012 mu mol/g during 4 h. On the other hand, BaNiSn-GT composite exhibited significantly higher hydrogen evolution rates of 870 mu mol/g with TEA scavenger and 730 mu mol/g with LA scavenger during 1 h, respectively. Moreover, the higher photocurrent density of BaNiSn-GT is correlated with electron-hole recombination, providing evidence for its inhibition, which leads to a longer lifetime of carriers produced by photoelectrons. The mechanism of the photocatalytic H-2 evolution of BaNiSn-GT based on a full physicochemical characterization was proposed. This study provides new insight into the efficient hydrogen-evolution of graphene-based photocatalysts.