以非表面活性剂三乙胺(TEA)和聚乙二醇(PEG)为模板剂,合成了具有立方莹石晶相结构的介孔CeO2材料,通过XRD,HRTEM,BET,FTIR和选区电子衍射(SAED)等手段对介孔CeO2进行了表征.考察了模板剂在CeO2介孔结构的形成过程中所起的作用及其对比表面、孔径分布、热稳定性的影响,并对模板剂的作用机制进行了分析.结果表明,三乙胺在CeO2介孔结构的形成中起关键作用,聚乙二醇对介孔结构热稳定性有明显的改善作用,经600℃焙烧3 h的样品仍能保持较好的介孔结构,其介孔呈直通型的六方型孔道,比表面积＞200m2·g-1,孔分布呈双孔型分布,其中介孔孔径约为5 nm左右,微孔孔径在1～2 nm之间,介孔占较大比例,并且微孔数量随焙烧温度的升高逐渐减少,直至600℃消失.
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