二氧化铈（CeO2）是一种很重要的稀土氧化物,应用前景广泛。介绍了一种新的制备方法制备出一种具有不同微观结构形貌的CeO2颗粒。该制备方法是通过在HMT醇水反应体系中加入白色葡萄球菌,用共沉淀得到表面具有多孔阵列结构的CeO2纳米粉体材料。借助扫描电镜、透射电镜、X射线衍射、热重分析等方法,表征和分析了所得样品的形貌、晶相组成、微观结构和反应成形机理。并最终对所得样品进行甲基橙脱色实验,考察了其污水处理能力。结果表明,所得CeO2样品颗粒在10nm左右,多孔阵列的孔洞直径约为400nm。多孔阵列结构样品对甲基橙脱色结果较好,脱色率可达95%以上。
Cerium oxide （ceria, CeOz） was one of the most reactive rare earth metal oxides in many application areas. A new preparation method was introduced here to create new structure ceria particles. By adding staphylococcus albus （S. a/bus） in aleohol-water solution with HMT as precipitator, nano-sized eeria powders with porous arrays in micro appearance surface were synthesized. The scanning electron microscopy （SEM）, transmission electron microscopy （TEM）, X-ray diffraction （XRD） and thermo gravimetrie analysis （TGA） were used to characterize and analyze the morphology, microstructure and phase composition of the produets, discuss the formation mechanism in the process. Furthermore, the decolorizing performance of the products on methyl orange dye wastes water was investigated. The results showed that synthesized porous arrays ceria particle was about 10nm in dimension, and the porous hole was about 400nm in size. The deeolour rate of porous arrays structure can reach 95% or above for methyl orange dye waste water,indicating a good decolorizing performance.
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