An improved sol–gel template synthetic route to large-scale CeO2 nanowires
An improved sol–gel template synthetic route to large-scale CeO2 nanowires
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DOI：
10.1016/j.materresbull.2004.03.006
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发表时间：
2004-06
影响因子：
5.4
通讯作者：
G.S Wu;T. Xie;X. Yuan;B.C Cheng;L.D Zhang
中科院分区：
文献类型：
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作者：
G.S Wu;T. Xie;X. Yuan;B.C Cheng;L.D Zhang
采用改进的溶胶-凝胶法在多孔阳极氧化铝模板的纳米孔道内成功制备了大尺寸CeO 2纳米线。该工艺以硝酸铈和尿素为前驱体，硝酸铈为铈离子源，尿素水解为基本介质。所合成的CeO 2纳米线具有萤石结构，纳米线尺寸均匀，直径约为70 nm。本文还讨论了纳米线的形成机理。对于小孔径模板，该方法比传统的溶胶-凝胶模板工艺更有效。
Large-scale CeO2nanowires were prepared successfully by an improved sol–gel process within the nanochannels of porous anodic alumina templates. In this process, cerium nitrate and urea were used as precursors, cerium nitrate acted as cerium ions source, and urea offered a basic medium through its hydrolysis. The as-synthesized CeO2nanowires can be indexed as a fluorite-structure and the size of nanowires is uniform, with diameters of about 70nm. The formation mechanism of nanowires is also discussed here. This method is more efficient than a traditional sol–gel template process for small pore diameter templates.