▎ 摘　　要

NOVELTY - Preparing palygorskite-titanium dioxide-graphene quantum dot composite photocatalyst comprises (1) mixing nitric acid with a mass concentration of 68% and deionized water to form a dilute nitric acid solution, (2) mixing isopropanol, titanate and the diluted nitric acid solution prepared in step (1) in a volume ratio of 15:1:30, and stirring for 1 hours until transparent, (3) adding 1 g palygorskite and graphene quantum dot solution with a concentration of 2 mg/ml to the solution obtained in step (2), adding dilute nitric acid until the total volume reaches 250 ml, and stirring for 1 hour, (4) heating the solution obtained in step (3) to the set temperature, maintaining the temperature and continue to stir, and (5) centrifuging, washing and drying the reaction product of step (4) to obtain palygorskite-titanium dioxide-graphene quantum dot composite photocatalyst. USE - The composite photocatalyst is useful as pollutant removal in the fields of water cracking hydrogen production, and carbon dioxide fuel production (claimed). ADVANTAGE - The composite photocatalyst: reduces the dispersion of the nano-titanium dioxide; and modifies the graphene quantum dot. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for palygorskite-titanium dioxide-graphene quantum dot composite photocatalyst comprising titanium dioxide and graphene quantum dots form a co-load on the surface of palygorskite, the grain size of titanium dioxide is smaller than the diameter of palygorskite fiber, and the crystal phase is anatase, the graphene quantum dots modify most of the titanium dioxide particles on the surface of palygorskite, and photo-generated carriers are easy to separate and transfer.