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中文摘要：
以无污染简单易得的天然材料壳聚糖为模板剂合成介孔氧化铈材料,并研究了材料的结构和催化性能.介孔Ce02的孔道结构由直径为5-8 nm的颗粒堆积形成,孔道孔径分布较为均匀,集中在5-10 nm,材料的比表面积约为102 m^2·g^-1.与氧化铈参比样相比,介孔氧化铈具有更好的氧化能力和催化活性,因为材料高比表面积导致了更多活性位点的暴露和表面活性氧的增多.介孔氧化铈的%T50转化率为50％时的温度点）约为300℃,远低于亚微米参比样的430℃.
英文摘要：
In this paper, we have synthesized Mesoporous CeO2 with the natural pollution-free chitosan as bio- logical template agent, and studied its structure and catalytic performance. Mesoporous samples are found consisting of nanocrystalline eeria with grain diameter about 5-8 nm and the uniform pore size around 5 to 10 nm. Their specific surface area is about 102 m2·g1. Compared with cerium oxide, mesoporous ceria has better ability of oxidation and catalytic activity, because its high surface area leads to more active sites on the surface and the increase of reactive oxygen species. Tso （conversion rate of 50%） of mesoporous cerium oxide is about 300 ℃, far lower than that of submicron 430 ℃.
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