▎ 摘　　要

NOVELTY - Method for preparing popcorn-like zinc ferrite/cadmium sulfide/graphene oxide heterojunction photocatalyst involves (a) adding iron salt and zinc acetate dihydrate to ethylene glycol, ultrasonically treating to obtain solution (A), reacting the solution (A) and carrying out solid-liquid separation to obtain popcorn-like zinc ferrite nanospheres, (b) (b1) dispersing the nanospheres into a cadmium salt aqueous solution, shaking to obtain a suspension (B), separating with a magnet to obtain zinc ferrite nanospheres, reacting and separating by a magnet to obtain a zinc ferrite/cadmium sulfide solid, (b2) returning the solid to the nanospheres to perform cadmium ion adsorption and sulfur salt solution reaction in sequence and using magnet to separate to obtain a sample (2), and (b3) repeating the step (b2) to obtain zinc ferrite/cadmium sulfide photocatalyst, and (c) adding the photocatalyst to graphene oxide dispersion, ultrasonically treating and heating to obtain the product. USE - The method is useful for preparing popcorn-like zinc ferrite/cadmium sulfide/graphene oxide heterojunction photocatalyst. ADVANTAGE - The catalyst exhibits high-efficiency catalysis ability for organic pollutants such as dyes in industrial wastewater, is convenient for recovery, safe, economical, and has stable cycle performance. DETAILED DESCRIPTION - Method for preparing popcorn-like zinc ferrite/cadmium sulfide/graphene oxide heterojunction photocatalyst involves (a) adding iron salt and zinc acetate dihydrate to ethylene glycol, ultrasonically treating for 5-60 minutes to obtain solution (A), reacting the solution (A) at 150-250 degrees C for 3-24 hours and carrying out solid-liquid separation to obtain popcorn-like zinc ferrite nanospheres, (b) (b1) dispersing the popcorn-like zinc ferrite nanospheres into a cadmium salt aqueous solution, shaking for 0.5-6 hours to obtain a suspension (B), separating with a magnet and removing the solution to obtain zinc ferrite nanospheres that adsorb cadmium ions, which will absorb cadmium ions, adding zinc ferrite nanospheres to the sulfur salt solution and reacting for 0.5-6 hours and separating by a magnet to obtain a zinc ferrite/ cadmium sulfide solid, (b2) returning the ZnFe2O4/CdS solid to the popcorn-like zinc ferrite nanospheres to perform cadmium ion adsorption and sulfur salt solution reaction in sequence and using magnet to separate to obtain a sample (2), and (b3) repeating the step (b2) for 1-10 times to obtain zinc ferrite/cadmium sulfide photocatalyst, and (c) adding zinc ferrite/cadmium sulfide photocatalyst to the graphene oxide dispersion, ultrasonically treating and heating at 80-240 degrees C to react for 0.5-24 hours and separating by a magnet to obtain the product.