▎ 摘　　要

NOVELTY - Catalyst comprises metal element which are copper element, zinc element, zirconium element and graphene oxide. The metal element is present in elemental or oxide form. The mass ratio graphene oxide and copper-zinc oxide-zirconium oxide is 0.04-0.16:1. The mass ratio of copper, zinc oxide and zirconium oxide is 4:3:3. USE - Catalyst for hydrogenation of carbon dioxide to methanol. ADVANTAGE - The catalyst is simple, good repeatability, and eco-friendly, reduces carbon dioxide emissions, has high specific surface area, and dispersion degree of the active component and catalytic activity and good conversion rate of carbon dioxide and methanol. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: (1) a method for preparing catalyst, which involves weighing copper source, zinc source and zirconium source; mixing and dissolving in 1-3mol/L aqueous solution; subjecting to ultrasonic dispersing for 30 minutes to obtain first mixed solution, where copper is nitric acid, zinc source is zinc nitrate and zirconium source is zirconium oxynitrate; dissolving sodium carbonate in de-ionized water to obtain 1-3mol/L second mixed solution; dissolving first mixed solution in de-ionized water to obtain third mixed solution; adding drop-wise first solution to third solution in water bath while adding drop-wise second mixed solution at 70 degrees C with rate of 100-200mL per hours by maintaining stirring speed of 900 revolution per minute;adjusting pH to 7-8; (2) stirring for 60-120 minutes; curing at at 20-40 degrees C for 8-26 hours; filtering and washing; drying at 80-120 degrees C for overnight and calcining at 300-400 degrees C for 5 hours to obtain powder sample; grinding and tabletting in to 20-40 meshes particles to obtain catalyst product; and (3) a method for hydrogenating carbon dioxide, which involves using catalyst in the fixed bed reactor under 0.1-2.0 megaPascal at speed of 1000-3000 per hour; reducing under atmosphere of nitrogen and hydrogen in volume ratio of 5:95 at 200-400 degrees C under 4.0-12.0 megaPascal for 4-24 hours, where quantity ratio of hydrogen and carbon dioxide is 1-3:1 and weight ratio is 5-20 gram hour per mol.