▎ 摘　　要

NOVELTY - Preparing graphene-bismuth oxyiodide-graphene complex photocatalyst by electrodeposition comprises (a) using fluorine-doped tin oxide (FTO) conductive glass as working electrode, silver/silver chloride electrode as reference electrode, graphite electrode as counter electrode, graphene oxide solution as electrolyte, electrochemically depositing and reducing graphene oxide on FTO conductive glass, (b) taking deposited FTO conductive glass with reduced graphene oxide as working electrode, electrochemically depositing bismuth oxyiodide on FTO conductive glass and (c) taking FTO conductive glass with bismuth oxyiodide reduced graphene oxide as working electrode, electrochemically depositing and reducing graphene oxide on FTO conductive glass to obtain the graphene-bismuth oxyiodide-graphene complex photocatalyst. USE - The catalyst is useful for treating dye wastewater (claimed). ADVANTAGE - The catalyst has uniform graphene on both surfaces and increased photo response range, thus the catalytic efficiency is greatly improved. The method: is simple, economical and convenient to recycle. DETAILED DESCRIPTION - Preparing graphene-bismuth oxyiodide-graphene complex photocatalyst by electrodeposition comprises (a) using fluorine-doped tin oxide (FTO) conductive glass as working electrode, silver/silver chloride electrode as reference electrode, graphite electrode as counter electrode, graphene oxide solution as electrolyte, electrochemically depositing and reducing graphene oxide on FTO conductive glass, (b) taking deposited FTO conductive glass with reduced graphene oxide as working electrode, silver/silver chloride electrode as reference electrode, graphite electrode as counter electrode, bismuth salt solution as electrolyte and electrochemically depositing bismuth oxyiodide on FTO conductive glass and (c) taking FTO conductive glass with bismuth oxyiodide reduced graphene oxide as working electrode, silver/silver chloride electrode as reference electrode, graphite electrode as counter electrode and graphene oxide solution as electrolyte, electrochemically depositing and reducing graphene oxide on FTO conductive glass to obtain the graphene-bismuth oxyiodide-graphene complex photocatalyst. An INDEPENDENT CLAIM is also included for photocatalyst prepared by above mentioned method.