▎ 摘　　要

NOVELTY - Preparing graphene oxide-terbium oxide-iron oxide composite material, comprises e.g. (i) mixing graphene oxide and deionized water, ultrasonically dissolving to obtain solution, (ii) adding terbium(III) chloride and iron(III) chloride hexahydrate into prepared solution to obtain mixed solution A, (iii) stirring prepared mixed solution A at constant temperature, and adjusting the pH to obtain mixed solution B, (iv) heating prepared mixed solution B and stirring while adding urea solution, controlling the pH of solution to obtain mixed solution C, (v) cooling prepared mixed solution C, stirring, adding sodium hydroxide, controlling pH, filtering and washing to obtain neutral precipitate, reacting, and cooling to obtain reaction product, and (vi) filtering obtained reaction product, washing, transferring neutral product into Petri dish, drying filter residue surface moisture, placing in vacuum drying oven to dry, and transferring to oven for drying. USE - The composite material is useful as catalyst for catalytic degradation in wastewater treatment field (claimed). ADVANTAGE - The method: has simple process, mild reaction conditions, and high reproducibility of experimental results; and produces product having stable performance. DETAILED DESCRIPTION - Preparing graphene oxide-terbium oxide-iron oxide composite material, comprises (i) mixing graphene oxide and deionized water, then ultrasonically dissolving to obtain solution, (ii) adding terbium(III) chloride and iron(III) chloride hexahydrate into the solution prepared in step (i) to obtain mixed solution A, (iii) stirring the mixed solution A prepared in step (ii) at constant temperature, and adjusting the pH to 6-6.5 to obtain mixed solution B, (iv) heating the mixed solution B prepared in step (iii) and stirring while adding urea solution, and controlling the pH value of solution to obtain mixed solution C, (v) cooling the mixed solution C prepared in step (iv) and stirring at room temperature, then adding sodium hydroxide, controlling the pH value and stirring, filtering and washing until the pH value of filtrate is neutral to obtain neutral precipitate, then adding the neutral precipitate washed with deionized water into hydrothermal reactor, reacting, and cooling to room temperature to obtain reaction product, and (vi) filtering the reaction product obtained in step (v), washing with deionized water until neutral, and transferring the neutral product to Petri dish, drying the surface moisture of filter residue, and placing in vacuum drying oven to dry, and then transferring to oven for drying to obtain final product. An INDEPENDENT CLAIM is also included for graphene oxide-terbium oxide-iron oxide composite material obtained by above method.