▎ 摘　　要

NOVELTY - Preparing graphene carbon nitrogen oxygen photocatalyst, comprises placing first quartz tube containing graphene carbon nitrogen powder in second quartz tube containing oxide or hydroxide powder, sealing the second quartz tube under negative pressure, calcining at preset temperature for preset duration, and cooling to room temperature to obtain graphene carbon-nitrogen-oxygen photocatalyst in first quartz tube. The mass ratio between graphene carbon and nitrogen powder and oxide or hydroxide powder is 1:3-3:1. The inner diameter and length of first quartz tube are both smaller than second quartz tube, and the mouths of first quartz tube and second quartz tube are placed in the same direction, the preset temperature is 350-700degrees Celsius, and the preset duration is 2-6 hours. USE - The method is useful for preparing graphene carbon nitrogen oxygen photocatalyst. ADVANTAGE - The graphene carbon nitrogen oxygen photocatalyst: has graphene carbon nitrogen molecule with sigmaasteriskC-O-C bond which enhances the light absorption performance of catalyst, prolongs the lifetime of photogenerated carriers, and improves photocatalytic hydrogen production characteristics. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for graphene carbon nitrogen oxygen photocatalyst obtained by above method.