▎ 摘　　要

NOVELTY - Preparing composite ternary heterojunction photocatalyst, comprises (i) preparing graphene oxide by modified Hummer's method and preparing graphitic carbon nitride nanosheets by thermal polymerization method, and then dispersing graphene oxide and graphitic carbon nitride in distilled water ultrasonically, (ii) adding zinc acetate, indium(III) acetate, silver nitrate and L-cysteine, then adding thioacetamide, transferring the solution to a PTFE-lined stainless steel reactor, carrying out hydrothermal reaction, separating the obtained precipitate by centrifugation, washing with deionized water multiple times, and drying to obtain ternary heterojunction silver-zinc indium sulfide/reduced graphene oxide/graphitic carbon nitride photocatalyst. USE - The ternary heterojunction photocatalyst is useful for photocatalytic hydrogen production in clean energy production and energy conversion field. ADVANTAGE - The ternary heterojunction photocatalyst has excellent visible light photocatalytic ability to split water to produce hydrogen. DETAILED DESCRIPTION - Preparing composite ternary heterojunction photocatalyst, comprises (i) preparing graphene oxide (GO) by modified Hummer's method and preparing graphitic carbon nitride (g-C3N4) nanosheets by thermal polymerization method, and then dispersing GO and g-C3N4 in distilled water ultrasonically, (ii) adding zinc acetate, indium(III) acetate, silver nitrate and L-cysteine, then adding thioacetamide, transferring the solution to a PTFE-lined stainless steel reactor, carrying out hydrothermal reaction, separating the obtained precipitate by centrifugation, washing with deionized water multiple times, and drying to obtain ternary heterojunction silver-zinc indium sulfide/reduced graphene oxide/graphitic carbon nitride photocatalyst of formula (Ag:ZnIn2S4/RGO/g-C3N4).