▎ 摘　　要

NOVELTY - Preparing copper-indium-sulfur quantum dot carbon aerogel photocatalyst comprises e.g. (a) dissolving glutathione in deionized water to obtain glutathione solution, adding Cu precursor aqueous solution, In precursor aqueous solution, S precursor aqueous solution and sodium citrate aqueous solution into glutathione solution, refluxing, washing and drying to obtain CuInS2 quantum dots, (b) ultrasonically dispersing the CuInS quantum dots and graphene oxide in deionized water to form a mixed dispersion, (c) dissolving sodium alginate in deionized water to form a sodium alginate solution, where the ratio of sodium alginate to deionized water is 0.2-0.5 g: 25 ml, (d) mixing the mixed dispersion liquid and the sodium alginate solution, freeze-drying to obtain aerogel, and (e) annealing the aerogel in a nitrogen atmosphere at 350-600℃ for 10-30 minutes. USE - The CuInS2 quantum dot carbon aerogel photocatalyst is useful in production of xylose acid by photo-catalysis (claimed). ADVANTAGE - The catalyst has advantages of high catalytic activity, good stability, recyclability, simple and efficient catalytic production of xylonic acid, and good application prospect. DETAILED DESCRIPTION - Preparing copper-indium-sulfur quantum dot carbon aerogel photocatalyst comprises (a) dissolving glutathione in deionized water to obtain a glutathione solution, adding the Cu precursor aqueous solution, In precursor aqueous solution, S precursor aqueous solution and the sodium citrate aqueous solution into the glutathione solution, refluxing at 85.0-98°C for 15-180 minutes, washing and drying to obtain CuInS2 quantum dots, where the ratio of the glutathione to deionized water is 0.05-0.3 g:120 ml, the concentration of the Cu precursor aqueous solution is 0.001-0.05 mol/l, the concentration of the In precursor aqueous solution is 0.1-2 mol/l, the concentration of the S precursor aqueous solution is 0.5-3 mol/l, the concentration of the sodium citrate aqueous solution is 0.1-2 mol/l, the volume ratio of the Cu precursor aqueous solution, the In precursor aqueous solution, the S precursor aqueous solution, the sodium citrate aqueous solution and the deionized water is 3-9:1-4:0.1-2:2-5:120, (b) ultrasonically dispersing the CuInS quantum dots and graphene oxide in deionized water to form a mixed dispersion, where the ratio of the CuInS2 quantum dots, graphene oxide, and deionized water is 20-200 mg:100 mg: 25 ml, (c) dissolving sodium alginate in deionized water to form a sodium alginate solution, where the ratio of sodium alginate to deionized water is 0.2-0.5 g: 25 ml, (d) mixing the mixed dispersion liquid and the sodium alginate solution, freeze-drying to obtain aerogel, where the volume ratio of the mixed dispersion liquid and the sodium alginate solution is 1:1, and (e) annealing the aerogel in a nitrogen atmosphere at 350-600℃ for 10-30 minutes. An INDEPENDENT CLAIM is included for using method of CuInS2 quantum dot carbon aerogel photocatalyst, comprising mixing the CuInS2 quantum dot carbon aerogel photo-catalyst, xylose and alkaline solution, and carrying out photo-catalytic reaction at 10-90℃ for 15-180 minutes.