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材料研究学报  2012, Vol. 26 Issue (5): 527-532    
  研究论文 本期目录 | 过刊浏览 |
反蛋白石结构三维有序大孔CeO2的制备和性能
陈杨1,2, 唐昭芳1, 祝雅娟1, 姚超3
1.常州大学材料科学与工程学院 常州 213164
2.常州大学先进金属材料常州重点实验室 常州 213164
3.常州大学石油化工学院 常州 213164
Synthesis, Characterization and Low-temperature Reducibility of Inverse Opal Three-dimensional Ordered Macroporous CeO2
CHEN Yang1,2,  TANG Zhaofang1,  ZHU Yajuan1,  YAO Chao3
1.School of Materials Science and Engineering, Changzhou University, Changzhou 213164
2.Key Laboratory of Advanced Metallic Materials of Changzhou City, Changzhou University, Changzhou 213164
3. School of Petrochemical Engineering, Changzhou University, Changzhou 213164
引用本文:

陈杨 唐昭芳 祝雅娟 姚超. 反蛋白石结构三维有序大孔CeO2的制备和性能[J]. 材料研究学报, 2012, 26(5): 527-532.
CHEN Yang TANG Zhaofang ZHU Yajuan YAO Chao. Synthesis, Characterization and Low-temperature Reducibility of Inverse Opal Three-dimensional Ordered Macroporous CeO2[J]. Chinese Journal of Materials Research, 2012, 26(5): 527-532.

全文: PDF(1078 KB)  
摘要: 

以单分散聚苯乙烯(PS)微球为构筑单元, 用双基片垂直沉积方法制备高度有序的PS胶体晶体模板, 再用模板法合成了具有反蛋白石结构的三维有序大孔CeO2(3DOM--CeO2)。用X--射线衍射仪(XRD)、场发射扫描电镜(FESEM)、高分辨透射电镜(HRTEM)、原子力显微镜(AFM)和N2吸脱附等手段对样品微观结构进行了表征, 并借助H2--TPR分析了样品的还原性能。结果表明: PS胶体晶体模板排列高度有序, 呈多层面心立方结构紧密堆积; 所制备的3DOM--CeO2具有三维周期性排列的多孔结构, 其孔间距在280--300 nm, 壁厚约为40 nm;样品的大孔骨架由粒径为5--10 nm的CeO2颗粒所组成;与纳米CeO2标样相比, 3DOM--CeO2样品具有更好的低温还原性能。

关键词 inorganic non-metallic materialsCeO2three-dimensional ordered macroporous materialinverse opal, colloidal crystal    
Abstract

Colloidal crystals templates, comprising polystyrene (PS) microspheres of diameter ca. 340 nm, were prepared by two-substrate vertical deposition method from aqueous colloidal suspensions of PS microspheres. Inverse opal three-dimensional ordered macroporous (3DOM) CeO2was synthesized by using PS colloidal crystal templates. The products were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), atomic force
microscope (AFM) and N2 adsorption–desorption. And the low-temperature reducibility of the obtained 3DOM-CeO2 was analyzed by hydrogen temperature-programmed reduction (H2-TPR). FESEM and AFM results show that the PS colloidal crystal template microspheres are arranged on a face-centered cubic lattice. The formed CeO2 inverse opals exhibit a three-dimensional ordered structure with macroporous framework, which is composed of loosely packed CeO2 nanoparticles. The hole spaces of the 3DOM–CeO2 is about 280–300 nm, and the thickness of the porous walls is ca. 40 nm. H2–TPR results indicate that the low-temperature reducibility of 3DOM–CeO2 is much better than that of ceria standard samples.

Key wordsinorganic non-metallic materials    CeO2    three-dimensional ordered macroporous material    inverse opal    colloidal crystal
收稿日期: 2012-04-09     
ZTFLH:  TB321  
基金资助:

江苏省高等学校科技创新团队(2011--24)资助项目。


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