▎ 摘　　要

NOVELTY - Preparing nitrogen-doped reduced graphene oxide-supported cadmium telluride/cadmium sulfide heterojunction composite photocatalyst involves preparing nitrogen-doped reduced graphene oxide and cadmium telluride nano particles, and weighing cadmium chloride hemi(pentahydrate), adding it to reactor core, adding deionized water, ultrasonically treating to completely dissolve, and then adding ammonia water, tartaric acid, sodium citrate, hydrazine hydrate, after ultrasonic treatment for half an hour. The kettle is placed in an oven to heat the reaction, after reaction is completed, it is cooled to room temperature, centrifuged, washed multiple times with deionized water and absolute ethanol, and dried to obtain cadmium telluride nanoparticles. USE - Method for preparing nitrogen-doped reduced graphene oxide-supported cadmium telluride/cadmium sulfide heterojunction composite photocatalyst. ADVANTAGE - The method enables to preparing nitrogen-doped reduced graphene oxide-supported cadmium telluride/cadmium sulfide heterojunction composite photocatalyst which is used to degrade 2,4-dichlorophenol wastewater. DETAILED DESCRIPTION - The preparation of nitrogen-doped reduced graphene oxide-supported cadmium telluride/cadmium sulfide composite photocatalyst further involves adding deionized water to the reactor core, draining air with nitrogen, weighing cadmium chloride hemi(pentahydrate), and ultrasonically dissolving to complete dissolution. The nitrogen-doped reduced graphene oxide is added to solution, ultrasonically dispersed, and sequentially added to cadmium telluride, thiourea, and ethylene glycol for half an hour, and kettle is placed in an oven to heated reaction, and cadmium chloride and thiourea are formed cadmium sulfide, after reaction is completed, cooled to room temperature, centrifuged, and washed multiple times with deionized water and absolute ethanol, and dried to obtain desired product.