▎ 摘　　要

Modification of Ag/ZnO/graphene nanocomposite using tert-butyldimethylsilyl chloride (TBSCI) as a precursor of the silicon substrate to produce a highly active catalytic system under visible light for hydrogen photoproduction is created in this work. The catalytic activity of this photoresponsive nanocatalyst towards methylene blue dye degradation and hydrogen production are in detail described. The rate order of methylene blue dye photodegradation and hydrogen evolution under visible light irradiation of the samples is: Ag/ZnO/graphene-TBSCI > Ag/ZnO/graphene > Ag/ZnO > ZnO/graphene > ZnO. The hydrogen evolution rate of Ag/ZnO/graphene/TBSCI-hybrid is about 45 times, 6.6 times, 6.4 times and 2.5 times faster than that of pure ZnO nanoparticles, ZnO/graphene, Ag/ZnO and Ag/ZnO/graphene composite, respectively. By introducing Si to Ag/ZnO/graphene composites, an enhancement for photodecomposition and water splitting efficiency under visible light irradiation has been achieved. This is a new advance in the enhancement of photocatalytic activity of nanostructures and offer additional knowledge in the control of charge recombination.