CeO_2/ATP纳米复合材料的水热合成及其表征

Hydrothermal Synthesis and Characterization of CeO_2/ATP Nanocomposite

以大比表面积的凹凸棒石(ATP)为载体,以Ce(NO3)3为铈源,利用水热法合成了含量不同的CeO2/ATP纳米复合材料,并采用XRD、TEM等对其进行了表征,并研究了水热反应温度和反应时间对复合材料结构与形貌的影响。结果表明:合成CeO2/ATP纳米复合材料的最佳水热反应温度为80℃,水热反应时间为72 h,此时CeO2的质量分数为42.8%,复合材料的比表面积最大,达到了235.4 m2.g-1,表面细小的CeO2颗粒分散性好,比普通CeO2具有更好的对CO催化氧化效果。

CeO2/ATP （attapulgite） nanocomposites with different contents were prepared by hydrothermal method using ATP with large specific surface area as supporter and Ce（NO3）3 as Ce source. The effects of temperature and time of hydrothermal reaction on the mierostructure and morphology of the composite were investigated by means of XRD and TEM. The results show that the optimal CeO2/ATP nanocomposites could be obtained under the conditions of the hydrothermal reaction temperature 80℃ and reaction time 72 h. The composite with 42. 8wt% CeO2 had the largest specific surface area up to 235. 4 m^2· g^-1 and the fine surface CeO2 particles distributed well, and thus had better catalytic and oxidation effects to CO than the composite with common CeO2.