▎ 摘　　要

NOVELTY - Preparing titanium and nitrogen-doped graphene quantum dot molecular sieve, comprises e.g. (i) sonicating molecular sieve in ultrapure water for 1-2 hour, then drying, and adjusting pH of the polyacrylamide aqueous solution, (ii) adding aqueous solution of polyacrylamide, tetrabutyl titanate and molecular sieve into organic solvent, and ultrasonicating at room temperature for 30 minutes, then transferring the materials and molecular sieve into reaction kettle, and reacting, cooling, filtering and separating, then washing the obtained molecular sieve with ultrapure water and ethanol, vacuum drying, and then placing the molecular sieve in muffle for annealing to obtain titanium-based molecular sieve, (iii) adding titanium-based molecular sieve and nitrogen-doped graphene quantum dots into reaction kettle, and using ultrapure water as solvent, and reacting, then cooling to room temperature, filtering, then washing the obtained molecular sieve and drying to obtain final product. USE - The method is useful for preparing titanium and nitrogen-doped graphene quantum dot molecular sieve. ADVANTAGE - The method: introducing titanium into nitrogen-doped graphene quantum dots, thus expands the absorption spectrum of titanium dioxide into visible light area, improves photocatalytic activity of the quantum dots in the visible light region and degradation of organic matter, and reduces the degradation time, and titanium nitrogen atoms promotes charge transfer, inhibits recombination of photo-generated electrons, and improves photocatalytic efficiency of quantum dots; and introducing molecular sieve, which adsorbs heavy metal ions and organic substances in water, and the organic matter is directly degraded by the attached titanium/aza hybrid graphene, which ensures the stability and efficiency of the system degradation, and also facilitates the recovery of the photo-catalyst, and saves production cost. DETAILED DESCRIPTION - Preparing titanium and nitrogen-doped graphene quantum dot molecular sieve, comprises (i) sonicating molecular sieve in ultrapure water for 1-2 hour, then drying until there is no water, and adjusting pH of the polyacrylamide aqueous solution to 1-2 and mixing uniformly, (ii) adding aqueous solution of polyacrylamide, tetrabutyl titanate and molecular sieve into organic solvent, and ultrasonicating at room temperature for 30 minutes, then transferring the materials and molecular sieve into reaction kettle, and reacting in acid environment at 170-180 degrees C for 10-12 hours, cooling to room temperature, filtering and separating titanium dioxide after ultrasonication for 5-10 minutes, then washing the obtained molecular sieve with ultrapure water and ethanol, vacuum drying, and then placing the molecular sieve in muffle furnace at 450-500 degrees C and for 3 hours for annealing to obtain titanium-based molecular sieve, (iii) adding titanium-based molecular sieve and nitrogen-doped graphene quantum dots into reaction kettle, and using ultrapure water as solvent, and reacting at 110-120 degrees C for 6-8 hours, then cooling to room temperature, filtering after 5-10 minutes, then washing the obtained molecular sieve with ultrapure water and ethanol and drying to obtain molecular sieve containing titanium and nitrogen-doped graphene quantum dots.