Template-Free Synthesis and Self-Assembly of CeO2 Nanospheres Fabricated with Foursquare Nanoflakes

被引：36

作者：

Cui, Rongrong ^{[1
]}

Lu, Wencong ^{[1
]}

Zhang, Liangmiao ^{[1
]}

Yue, Baohua ^{[1
]}

Shen, Shanshan ^{[1
]}

机构：

[1] Shanghai Univ, Dept Chem, Shanghai 200444, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2009年 / 113卷 / 52期

关键词：

CO OXIDATION; CATALYTIC-PROPERTIES; FUEL-CELL; CERIA; NANOPARTICLES; SURFACES; NANORODS; SHIFT; CONVERSION; GROWTH;

D O I：

10.1021/jp9065168

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Large-scale CeO2 spherical architectures composed of numerous nanoflakes have been controllably prepared through a simple hydrothermal reaction without any template. The products were characterized with X-ray diffraction, nitrogen adsorption-desorption experiments, transmission electron microscopy (TEM), and high-resolution transmission electron microscopy (HRTEM). It was found that the CeO2 architecture ca. 100-230 nm in diameter was made tip of many nanoflakes with a BET surface of 24 m(2)/g. The possible mechanism for the nanostructures formation was discussed. The catalytic performance of CeO2 nanospheres and the direct-depositing CeO2 nanoparticles in CO oxidation were also tested, and the catalytic results were compared and explained by analyzing the exposed planes of the two.

引用

页码：21520 / 21525

页数：6

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