▎ 摘　　要

NOVELTY - Preparation of single-phase graphene-bismuth-titanate based photocatalyst nanocomposite, involves adding soluble bismuth salt to the carboxylic acid, stirring until bismuth salt is completely dissolved, adding titanate, and then adding a structure-directing agent, stirring evenly, and adding urea, and obtaining mixed solution, pouring the mixed solution into an alcohol solvent, adding graphene, mixing and obtaining bismuth-titanate based photocatalyst nanocomposite, evenly dispersing the obtained bismuth-titanate based photocatalyst nanocomposite in the graphene, and calcining. USE - Preparation of single-phase graphene-bismuth-titanate based photocatalyst nanocomposite (claimed). ADVANTAGE - The single-phase graphene-bismuth-titanate based photocatalyst nanocomposite is prepared at low cost under mild reaction conditions. The prepared photocatalyst nanocomposite has excellent photocatalytic activity. DETAILED DESCRIPTION - Preparation of single-phase graphene-bismuth-titanate based photocatalyst nanocomposite, involves adding soluble bismuth salt to the carboxylic acid in a molar ratio of 1:50-70, stirring until bismuth salt is completely dissolved, adding titanate where the molar ratio of titanium and bismuth is 1:8-13, and then adding a structure-directing agent where the molar ratio of bismuth and structure directing agent is 1:3-4.5, stirring evenly, and adding urea where the molar ratio of bismuth and urea is 1:0.5-3, and obtaining mixed solution, pouring the mixed solution into an alcohol solvent where the alcohol solvent volume is 25-45 mL/g of soluble bismuth salt material, adding 0.5-2 g graphene per 100 ml of alcohol solvent, mixing and obtaining bismuth-titanate based photocatalyst nanocomposite having composition of formula: Bi20TiO32 by supercritical method, evenly dispersing the obtained bismuth-titanate based photocatalyst nanocomposite in the graphene, and finally calcining to obtain graphene-bismuth-titanate based photocatalyst nanocomposite.