▎ 摘　　要

NOVELTY - Preparation of graphene/silver/mesoporous titanium dioxide nanocomposite photocatalyst involves dissolving graphene oxide and graphene in an organic solvent and then mixing to obtain a graphene solution, adding silver nitrate solution to the graphene solution and mixing to obtain a graphene/silver solution, dissolving hexadecyltrimethylammonium bromide in an organic solvent and mixing, dissolving tetrabutyl titanate in an organic solvent and mixing, adding nitric acid solution to the mixture and stirring, adding graphene/silver solution to the mixture, and sintering. USE - The process is useful for preparation of graphene/silver/mesoporous titanium dioxide nanocomposite photocatalyst, which is useful for photocatalytic degradation of organic contaminants in sewage or air (claimed). DETAILED DESCRIPTION - Preparation of graphene/silver/mesoporous titanium dioxide nanocomposite photocatalyst involves dissolving graphene oxide and graphene in an organic solvent, uniformly mixing to obtain a graphene solution, adding silver nitrate solution to the graphene solution and then mixing to obtain a graphene/silver solution, dissolving hexadecyltrimethylammonium bromide in an organic solvent, uniformly mixing to obtain a solution (A), dissolving tetrabutyl titanate in an organic solvent to obtain a transparent solution (B), adding solution (B) to the solution (A), uniformly mixing, controlling speed for 0.5-5 seconds to obtain a solution (C), adding nitric acid solution to the solution (C) and then stirring to obtain an inorganic titanium precursor solution (E), adding graphene/silver solution to the solution (E) and then continuously stirring, extracting the mixture and then drying, and sintering under nitrogen atmosphere. INDEPENDENT CLAIMS are included for the following: (1) graphene/silver/mesoporous titanium dioxide nanocomposite photocatalyst prepared by the method; and (2) use of graphene/silver/mesoporous titanium dioxide nanocomposite photocatalyst for photocatalytic degradation of organic contaminants in sewage or air.