水热法制备立方体二氧化铈及其CO催化氧化性能研究

Study on Preparation and Properties of Cubic CeO_2 Catalyst Prepared by Hydrothermal Method

利用水热合成法合成立方体形貌的二氧化铈,并与共沉淀法合成的二氧化铈催化剂在催化剂形貌、晶形、CO催化氧化活性方面进行了比较。结果显示:利用水热法合成的二氧化铈立方体形貌规整、分散性能好、热稳定性能优良;与共沉淀法制备的CeO_2纳米材料相比,对于CO的催化氧化具有更高的活性。

The CeO2 of cubic morphology was synthesized by hydrothermal synthesis method.And the CeO2 nano-powders catalystwas synthesized by co-precipitation for comparison.The microstructure and surface morphology of the catalysts were characterizedby XRD, SEM, and the catalytic performances in CO catalytic oxidation activity were studied.Results showed that the cubic CeO2synthesized have regular morphology and dispersion performance with excellent thermal stability.And it was found to have highercatalytic activity for CO oxidation than the catalyst prepared by co-precipitation, which was supposed to be concerned with its specialmorphology and exposed crystal surface.