Mesoporous CeO2 Hollow Spheres Prepared by Ostwald Ripening and Their Environmental Applications

被引：115

作者：

Yang, Zhijie ^{[1
]}

Wei, Jingjing ^{[1
]}

Yang, Hongxiao ^{[1
]}

Liu, Ling ^{[1
]}

Liang, Hui ^{[1
]}

Yang, Yanzhao ^{[1
]}

机构：

[1] Shandong Univ, Sch Chem & Chem Engn, Educ Minist, Key Lab Special Funct Aggregate Mat, Jinan 250100, Peoples R China

来源：

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY | 2010年 / 21期

关键词：

Hydrothermal synthesis; Template-free synthesis; Water treatment; Heterogeneous catalysis; Adsorption; TEMPLATE-FREE PREPARATION; CERIA NANOPARTICLES; SILICA NANOSPHERES; CARBON NANOTUBES; FABRICATION; NANORODS; SIZE; NANOSTRUCTURES; MICROSPHERES; ADSORPTION;

D O I：

10.1002/ejic.201000030

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

CeO2 hollow spheres (250-350 nm in diameter), with mesoporous shells of approximately 50 nm, were synthesized by a one-pot, template-free hydrothermal method. X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), scanning electron microscopy (SEM), high resolution transmission electron microscopy (HRTEM), and nitrogen adsorption-desorption measurements were used to characterize the products. The formation of these hollow spheres involves the aggregation of the initial nanoparticles followed by solid evacuation driven by an Ostwald ripening process. The mesoporous CeO2 hollow spheres showed an excellent adsorption capacity for organic pollutants (Congo red) from waste water (about 84 mg Congo red per g CeO2). Furthermore, relative to commercial CeO2 powders, the CeO2 hollow spheres exhibited a higher catalytic activity towards CO oxidation.

引用

页码：3354 / 3359

页数：6

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