▎ 摘　　要

An easy yet viable hydrothermal reaction is demonstrated to prepare ultra-small Zn2SnO4 nanoparticle with similar to 4.2 nm decorated reduced graphene oxide (RGO) nanocomposites (Zn2SnO4-RGO). The pure phase Zn2SnO4 nanoparticles with similar to 4.2 nm can be achieved during hydrothermal reaction, meanwhile, these nanoparticles uniformly dispersed on 2D graphene sheet, and graphene oxide was reduced. The photocatalytic performances of the as-prepared Zn2SnO4-RGO nanocomposites with different RGO mass ratio are investigated. The optimum synergetic effect is found when the RGO mass ratio is 7.11%, with the photocurrent and photodegradation efficiency improved by about 300% and 80% on methylene blue (MB), respectively, compared with the pure Zn2SnO4 nanoparticles.