▎ 摘　　要

NOVELTY - A cobalt hydroxystannate/graphene composite photocatalyst is hydrothermally synthesized using cobalt hydroxystannate supported on graphene. The cobalt hydroxystannate has particle size of 60-80 nm. USE - Preparation of cobalt hydroxystannate/graphene composite photocatalyst used for photocatalytically degrading rhodamine B solution (claimed). ADVANTAGE - The method enables preparation of cobalt hydroxystannate/graphene composite photocatalyst with particle size distribution of 60-80 nm and high visible light utilization rate and photocatalytic activity by economical and simple method. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for usage of cobalt hydroxystannate/graphene composite photocatalyst used for photocatalytically degrading rhodamine B solution.