Constructing a multicomponent junction for improved visible-light photocatalytic performance induced by Au nanoparticles.

Au induced visible-light photocatalytic performance is, for the first time, demonstrated to be effectively enhanced by a proper construction of a junction nanostructure. A study of the ˙O2(-) and H2O2 radicals indicates the efficient electron transfer across the Au-SrTiO3-TiO2 composite facilitated by the junction effect is responsible for the enhancement, and ultimately promotes the photocatalytic process.