▎ 摘　　要

NOVELTY - Indium-zinc sulfide-nitrogen-doped graphene composite photocatalytic material comprises three-dimensional nitrogen-doped graphene foam and two-dimensional indium-zinc sulfide nanosheets which are vertically arranged on the surface of nitrogen-doped graphene foam, where the indium-zinc sulfide nanosheets and nitrogen-doped graphene foam forms a two dimensional/three dimensional heterojunction, the three-dimensional nitrogen-doped graphene foam has a porous structure, and indium-zinc sulfide has a hexagonal phase. USE - The composite photocatalytic material is useful in catalytic reduction of carbon dioxide (claimed). ADVANTAGE - The composite photocatalytic material: exhibits excellent photocatalytic activity under simulated sunlight; has excellent catalytic effect and sufficient ultraviolet-visible-near-infrared light-to-heat conversion efficiency; and enhances utilization efficiency of sunlight. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing indium-zinc sulfide-nitrogen-doped graphene composite photocatalytic material, comprising (i) subjecting surface of polyurethane sponge after impurity removal pre-treatment to hydrophilic treatment by ultraviolet irradiation, (ii) uniformly dispersing graphene oxide in a mixed solvent to obtain graphene oxide suspension, soaking step (i) product in graphene oxide suspension, taking out the sponge adsorbed with graphene oxide, drying, calcining and oxygen plasma cleaning to obtain three-dimensional nitrogen-doped graphene foam, and (iii) dissolving inorganic zinc salt and inorganic indium salt in a mixed solvent to obtain salt solution, soaking step (ii) in salt solution, stirring, adding sulfur-containing organic matter, stirring uniformly, performing hydrothermal reaction, two-dimensional indium-zinc sulfide nanosheets grown on three-dimensional nitrogen-doped graphene foam and post-treating to obtain final product.