▎ 摘　　要

NOVELTY - A nitrogen-doped indium oxide nanorod is prepared by dripping indium(III) chloride solution to urea solution, obtaining mixture (m1) by stirring, aging mixture, filtering, washing residue with deionized water, and drying. Then, nitrogen-doped indium oxide nanorod and graphene oxide are dissolved in absolute ethanol, and ultrasonically dispersed, to obtain a mixture (m2). The obtained mixture is irradiated using mercury lamp, washed, filtered, and obtained residue is dried, to obtain nitrogen-doped indium oxide nanorod/graphene oxide composite photocatalyst. USE - Preparation of nitrogen-doped indium oxide nanorod/graphene oxide composite photocatalyst used for decomposing organic pollutants in water. ADVANTAGE - The method enables preparation of nitrogen-doped indium oxide nanorod/graphene oxide composite photocatalyst having high light response and activity under visible light conditions. The photocatalyst enables effective and environmentally-friendly degradation of phenol-containing wastewater with high recovery rate. DETAILED DESCRIPTION - A nitrogen-doped indium oxide nanorod is prepared by forming indium(III) chloride solution and urea solution by dissolving indium(III) chloride tetrahydrate and urea, respectively in deionized water, dripping indium(III) chloride solution to urea solution, obtaining mixture (m1) by stirring for 10-25 minutes, aging mixture at 130-200 degrees C for 5-24 hours, filtering, washing residue with deionized water, and drying by heat-treatment by heating at 250-350 degrees C at rate of 5-15 degrees C/minute, naturally cooling to room temperature and maintaining for 2-5 hours. Then, nitrogen-doped indium oxide nanorod and graphene oxide are dissolved in absolute ethanol, and ultrasonically dispersed for 0.5-1.5 hours, to obtain a mixture (m2). The obtained mixture is irradiated with mercury lamp having power of 150-500 W for 3-8 hours, washed with deionized water, filtered, and obtained residue is dried at room temperature, to obtain nitrogen-doped indium oxide nanorod/graphene oxide composite photocatalyst. The weight ratio of indium(III) chloride solution and urea solution in mixture (m1) is (0.3-1.5):(0.5-1.5). The weight ratio of nitrogen-doped indium oxide nanorod and graphene oxide is (0.2-1):(0.04-1).