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中文摘要：
以滤纸为模板,合成了具有滤纸微观形貌和纳米级孔均匀分布的CeO2纤维,利用热重分析、X射线衍射、电镜观察、氮气吸/脱附等方法对其进行表征,考察了前驱体溶液浓度对其微观结构的影响,最后研究了CeO2纤维的催化性能。结果表明：前驱体溶液浓度为0.02mol·L^-1时,合成的CeO2纤维的比表面积最大,约为84.7cm^2·g^-1,纤维长为0.5-5mm,直径为5-20μm,纤维结构由5-10nm的CeO2纳米晶组成,纳米孔径约为3nm,此多孔CeO2纤维具有良好的CO催化氧化活性,在450℃时的CO转化率可达100%;随着前驱体溶液浓度的增加,由于颗粒堆积,影响了产物对模板的复制效果。
英文摘要：
Biomorphic CeO2 fibers with the biomorphic structure of filter paper and uniform nano pores were successfully synthesized by taking the fitter paper as template. Many methods were used to characterize the CeO2, including thermogravimetric analysis, Xray diffraction, electron microscopy, nitrogen adsorption-desorption, etc. The effect of the precursor solution concentration on the structure of CeO2 fibers, and the catalytic property of CeO2 were studied. The results indicate that the synthesied CeO2 fibers consisting of 5-10 nm CeOe nanocrystals with the largest surface areas of about 84. 7 cm^2 · g^- 1 were 0. 5--5 mm in length, 5-20μm in diameter and 3 nm in pore size, when the concentration of the precursor solution was 0.02 mol · L^-1. These porous CeO2 fibers possessed a superior catalytic activity for CO oxidation and 100% CO conversion at 450℃. With the increase of precursor solution concentration, the copy effect of product for the template was impacted due to the grain accumulation.
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