▎ 摘　　要

NOVELTY - Catalyst comprises 5-45 wt.% copper, 1-30 wt.% zinc, 1-30 wt.% aluminum and 2-50 wt.% reduced graphene oxide, metal element is present in elemental or oxide form is copper, zinc oxide, aluminum oxide, and mass ratio between copper, zinc oxide and aluminum oxide is 4-7:3:3, and mass ratio between reduced graphene oxide and copper-zinc oxide-aluminum oxide is 0.04-0.2:1. USE - The catalyst is useful for preparing methanol by carbon dioxide hydrogenation (claimed). ADVANTAGE - The catalyst has simple preparation method, good repeatability, high specific surface area, and is easy to control. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing catalyst comprising (i) taking graphene oxide, ultrasonically dispersing for 30 minutes, and dissolving deionized water to obtain solution A, (ii) dissolving catalyst composed of metal elements in the form of nitrate in deionized water to obtain mixed aqueous solution having concentration of 1-3 mol/l as solution B, (iii) dissolving sodium carbonate or potassium carbonate in deionized water to obtain aqueous solution having concentration of 1-3 mol/l as solution C, (iv) carrying out coprecipitation method by adding B into solution A, then dripping into C solution under water bath at 50-100 degrees C, where dripping speed is 100-200 ml/hour, adjusting pH to 7-8, and stirring at a speed of 800-1000 revolution/minute, (v) stirring for 30 minutes, adding 0-10 ml hydrazine hydrate, continuously stirring for 60-120 minutes, and aging at 20-40 degrees C for 8-26 hours, and (vi) filtering reaction product, washing, drying, calcining at 300-400 degrees C for 5 hours to obtain catalyst product.