Nanosized Co₃O₄ with different morphologies (rods-like (NR-), flowers-like (NF-), cages-like (NC-) and single crystal (NP-)) were synthesized by using hydrothermal and co-precipitation methods and applied in catalytic removal of ethyl acetate (EA). Complete EA conversion under a space velocity of 30,000 mL/ (g h) are shown at 210 °C for NP-Co₃O₄. The results of physicochemical properties reveals that NP-Co₃O₄ catalyst performs the best catalytic activity for EA oxidation attributed to larger specific surface area, better low-temperature reducibility, abundant Co³⁺ cationic species exposed on the (220) plane and sufficiently active surface oxygen species.

利用水热共沉淀法合成了不同形态的纳米Co ₃ O ₄（棒状（NR-），花状（NF-），笼状（NC-）和单晶（NP-））。并用于催化去除乙酸乙酯（EA）。对于NP-Co ₃ O _4，在210°C下，空速为30,000 mL /（g h）时，EA完全转化。物化性质的结果表明，NP-Co ₃ O ₄催化剂对EA氧化表现出最佳的催化活性，这归因于较大的比表面积，更好的低温还原性，在（220）平面上暴露的丰富的Co ³⁺阳离子种类以及足够的活性表面氧种类。