▎ 摘　　要

NOVELTY - A strontium titanate/graphene composite catalyst comprises strontium titanate and graphene. Strontium titanate is loaded on the surface of graphene. USE - Strontium titanate/graphene composite catalyst used in decomposition of water to produce hydrogen gas (claimed). ADVANTAGE - The strontium titanate/graphene composite catalyst has high photocatalytic activity, high specific surface area of graphene, high chemical stability, high adsorption properties and high electrical conductivity. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) preparation of strontium titanate/graphene composite catalyst, which involves adding graphene oxide to ethanol, ultrasonic dispersing to obtain graphene oxide dispersion, adding butyl titanate to graphite oxide dispersion, adding glacial acetic acid, stirring and dissolving to obtain solution (A), adding strontium nitrate to the deionized water, stirring and dissolving to obtain solution (B), adding solution (B) to the solution (A) under stirring condition, stirring well, forming homogeneous sol by ultrasonic dispersion, adjusting pH value to 13-14, transferring homogeneous sol to the high pressure reaction kettle and carrying out high temperature treatment; and (2) usage of strontium titanate/graphene composite catalyst in decomposition of water to produce hydrogen gas, which involves placing strontium titanate/graphene composite catalyst, water and sacrificial reagent in the container, mixing to obtained mixed reaction solution, placing mixed reaction solution under vacuum and illumination condition.