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以大比表面积的凹凸棒石为载体,利用均匀沉淀法制备了具有高吸附性能的凹凸棒石/CeO_2纳米复合催化剂,并采用X射线衍射、透射电镜、比表面积对负载了不同含量CeO_2的凹凸棒石的结构进行了表征,探讨了反应温度和煅烧温度对复合材料形貌的影响,并研究了在CO催化氧化反应中不同CeO_2负载量复合物的催化性能。结果表明:合成凹凸棒石/CeO_2纳米复合材料的最佳反应温度为75℃,煅烧温度为200℃,此时50%负载量样品的比表面积最大。为223.8m~2/g~凹凸棒石/CeO_2纳米复合纳米催化剂具有很强的协同催化效应,从而提高了催化活性,且CeO_2负载量为50%～100%的复合材料的催化效果较好。
The attapulgite / CeO 2 nanocomposite catalyst with high adsorption capacity was prepared by uniform precipitation method using attapulgite with large specific surface area as support. The surface morphology of the attapulgite / CeO 2 nanocomposite catalyst with different contents of CeO 2 was characterized by X-ray diffraction, transmission electron microscopy and specific surface area The effects of reaction temperature and calcination temperature on the morphology of the composites were investigated. The catalytic performance of different CeO 2 supported compounds in CO catalytic oxidation was also investigated. The results show that the optimum reaction temperature is 75 ℃ and the calcination temperature is 200 ℃ for the attapulgite / CeO2 nanocomposites. The specific surface area of 50% loading sample is the largest. The catalytic activity of attapulgite / CeO 2 nanocomposite nanocatalyst with 223.8m ~ 2 / g was improved, and the catalytic activity was improved. The catalytic activity of composites with CeO_2 loading of 50% ~ 100% was good.