▎ 摘　　要

NOVELTY - Hydroxystannate iron/graphene composite photocatalyst comprises hydroxystannate iron loaded on graphene. USE - Used as hydroxystannate iron/graphene composite photocatalyst. ADVANTAGE - The photocatalyst has wide spectrum of light absorption, high utilization of visible light, low probability of electron-hole pair recombination in the photocatalytic reaction and high photocatalytic activity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing hydroxystannate iron/graphene composite photocatalyst, comprising preparing graphite oxide and hydroxystannate iron powder, then preparing into respective solution, mixing the solutions, transferring into a high-temperature box-type furnace, reacting for 5-8 hours to reduce graphite oxide into graphene and hydroxystannate iron composite, centrifugally washing the reaction solution, then drying and grinding.