中文摘要：

以棉花为模板、经硝酸铈溶液浸渍后煅烧，合成多孔结构的生物形态二氧化铈微管材料。采用场发射扫描电子显微镜(FESEM)、X射线衍射(XRD)、透射电子显微镜(TEM)、N2吸脱附程序升温还原(TPR)和CO氧化等手段对样品进行表征。结果表明，合成的材料是由尺寸约9nm的晶粒组成，复制出原模板的纤维形貌，比表面积(BET)为62.3m2/g。与传统CeO2微粒相比，在CO氧化实验中，所合成的材料表现出极高的催化活性。所合成的纤维状CeO2在320°C下CO的转化率约为90%，在410°C下CO的转化率达到100%。

英文摘要：

A biomorphic CeO2microtube with multiple-pore structure was fabricated by using the cotton as biotemplate,throughcerium nitrate solution infiltration and thermal decomposition.Field emission scanning electron microscope(FESEM),powder X-raydiffraction(XRD),transmission electron microscope(TEM),N2adsorption?desorption isotherms,temperature-programmedreduction(TPR)and CO oxidation were used to characterize the samples.The results indicated that the synthesized products werecomposed of crystallites with grain size about9nm and exhibited a fibrous morphology similar to the original template andpossessed a specific surface area(BET)of62.3m2/g.Compared with the conventional CeO2particles,the synthesized materialsshowed a superior catalytic activity for CO oxidation.For the synthesized fibrous CeO2,the CO conversion at320°C was above90%and a100%CO conversion was obtained at410°C.