Three-dimensional ordered mesoporous (3D) Co₃O₄ as a transition metal oxide is widely used in CO catalytic oxidation, and graphene oxide has the abundant oxygen-containing groups and oxygen vacancies which are beneficial to promote the activity of Co₃O₄-based catalyst. In this paper, the 3D Co₃O₄/GO catalysts are applied to CO catalytic oxidation reaction and we studied in detail the synergistic effect between 3D Co₃O₄ and GO. Three dimensionally ordered mesoporous Co₃O₄/GO (3D Co₃O₄/GO) catalysts are prepared by solvothermal method. The addition of graphene oxide obviously increased the specific surface area and promoted the dispersion of active metal. The oxygen-containing groups on the surface of graphene oxide increase the reactive sites simultaneously. The synergistic effect of graphene oxide and Co₃O₄ made the 3D Co₃O₄/GO catalyst showed excellent catalytic activity. Moreover, the influence of solvent (water, ethanol, ethylene glycol) was studied. The results showed that the change of the solvent did not affect the structure of the metal oxide, but affected the chemical state of the metal and the concentration of oxygen-containing functional groups on the surface of catalyst.

三维有序介孔（3D）Co ₃ O ₄作为过渡金属氧化物被广泛用于CO催化氧化，并且氧化石墨烯具有丰富的含氧基团和氧空位，有利于促进Co ₃ O ₄的活性基催化剂。本文将3D Co ₃ O ₄ / GO催化剂用于CO催化氧化反应，并详细研究了3D Co ₃ O ₄与GO的协同作用。三维有序介孔Co ₃ O ₄ / GO（3D Co ₃ O ₄/ GO）催化剂是通过溶剂热法制备的。氧化石墨烯的加入明显增加了比表面积并促进了活性金属的分散。氧化石墨烯表面上的含氧基团同时增加了反应性位点。氧化石墨烯与Co ₃ O ₄的协同作用使3D Co ₃ O ₄ / GO催化剂表现出优异的催化活性。此外，还研究了溶剂（水，乙醇，乙二醇）的影响。结果表明，溶剂的变化不影响金属氧化物的结构，但影响金属的化学状态和催化剂表面含氧官能团的浓度。