▎ 摘　　要

NOVELTY - Preparation of graphene-modified zinc stannate, involves (i) adding 40 g graphene oxide suspension into 0.5 g zinc stannate and stirring homogeneously to obtain a homogeneous suspension where the mass of the graphene oxide is 0.5-10% of the mass of the zinc stannate, (ii) adding hydrazine hydrate to the suspension formed in the step (i), reacting and mixing until the reaction is completed where the mass ratio of graphene oxide and hydrazine hydrate is (1-2):1, (iii) separating the mixture obtained in step (ii) to obtain graphene-modified zinc stannate. USE - Preparation of graphene-modified zinc stannate for use as photocatalytic material used for photocatalysis of wastewater containing dye such as methylene blue, methylene orange or Rhodamine B (all claimed). ADVANTAGE - The graphene-modified zinc stannate has high photocatalytic activity than pure zinc stannate.