▎ 摘　　要

NOVELTY - Preparing magnetic reduction graphene oxide/cobalt molybdate composite catalyst comprises (i) preparing and magnetically reducing graphene oxide by co-precipitation method comprising (ia) dissolving graphene oxide in deionized water, and obtaining uniform graphene oxide solution, (ib) dissolving ferric chloride hexahydrate and ferrous sulfate heptahydrate in deionized water, (ic) adding aqueous ammonia and graphene oxide solution, (id) performing magnetic separation with deionized water and absolute ethyl alcohol, and (ie) grinding product to obtain powdered magnetically reduced graphene oxide, and (ii) preparing magnetically reduced graphene oxide/cobalt molybdate composite catalyst by hydrothermal method by (iia) stirring powdered magnetically reduced graphene oxide to obtain magnetically reduced graphene oxide solution, adding cobalt nitrate solution, and adding sodium molybdate solution, and (iib) magnetically separating product with deionized water and absolute ethyl alcohol. USE - The catalyst is useful in degrading antibiotics in sewage as an adsorption-photocatalyst (claimed). ADVANTAGE - The method: prepares mildly reduced graphene oxide (MrGO)/molybdenum cobalt oxide (CoMoO4) composite catalyst which utilizes characteristics that graphene oxide has a strong adsorption effect on benzene ring structure of lomefloxacin; adsorbs lomefloxacin in sewage on the catalyst; constructs two semiconductors of CoMoO4 and iron(II, III) oxide to form a heterojunction to reduce the recombination rate of electrons and holes; improves the photocatalytic efficiency; enables the catalyst to be quickly and conveniently recycles after degradation in the presence of iron(II, III) oxide; avoids secondary pollution; has convenient recycling; is economical; has convenient operation and high economic benefits; and embodies idea of innovation and idea of green chemistry. DETAILED DESCRIPTION - Preparing magnetic reduction graphene oxide/cobalt molybdate composite catalyst comprises (i) preparing and magnetically reducing graphene oxide by co-precipitation method comprising (ia) dissolving graphene oxide in deionized water, ultrasonically stirring until completely dissolved to obtain a uniform graphene oxide solution, (ib) dissolving ferric chloride hexahydrate and ferrous sulfate heptahydrate in deionized water, placing into a three-necked flask, filling with nitrogen for protection, and heating to 45°C, (ic) quickly adding aqueous ammonia to three-necked flask, uniformly stirring, adding graphene oxide solution, and heating to 80-90°C for reacting, (id) cooling to room temperature after reaction, and performing magnetic separation with deionized water and absolute ethyl alcohol and (ie) drying and grinding the product to obtain powdered magnetically reduced graphene oxide, and (ii) preparing magnetically reduced graphene oxide/cobalt molybdate composite catalyst by hydrothermal method comprising (iia) ultrasonically stirring the powdered magnetically reduced graphene oxide to obtain a magnetically reduced graphene oxide solution, adding cobalt nitrate solution, mechanically stirring, adding sodium molybdate solution to above mixed solution and mechanically stirring, (iib) placing in a polytetraethylene reaction kettle at 180°C for 8-12 hours, and (iic) magnetically separating the product with deionized water and absolute ethyl alcohol, drying and grinding to obtain powdered magnetically reduced graphene oxide/cobalt molybdate composite catalyst. An INDEPENDENT CLAIM is also included for a magnetic reduction graphene oxide/cobalt molybdate composite catalyst prepared by the above-mentioned method.