Porous cerium dioxide hollow spheres and their photocatalytic performance

被引：41

作者：

Yuan, Saisai ^{[1
,2
]}

Zhang, Qitao ^{[1
,2
]}

Xu, Bin ^{[1
,2
,3
]}

Jin, Zhengyuan ^{[1
]}

Zhang, Ya ^{[5
]}

Yang, Yin ^{[1
]}

Zhang, Ming ^{[2
,3
]}

Ohno, Teruhisa ^{[1
,4
]}

机构：

[1] Kyushu Inst Technol, Fac Engn, Dept Appl Chem, Kitakyushu, Fukuoka 8048550, Japan

[2] Yangzhou Univ, Sch Chem & Chem Engn, Yangzhou 225002, Peoples R China

[3] Yangzhou Univ, Test Ctr, Yangzhou 225002, Peoples R China

[4] JST, PRESTO, ACT C, Saitama 3320012, Japan

[5] Yangzhou Univ, Sch Environm Sci & Engn, Yangzhou 225002, Peoples R China

来源：

RSC ADVANCES | 2014年 / 4卷 / 107期

基金：

中国国家自然科学基金;

关键词：

CEO2-ZRO2; SOLID-SOLUTION; CONTROLLABLE SYNTHESIS; ULTRAVIOLET-ABSORPTION; CO OXIDATION; CEO2; OXIDE; NANOSTRUCTURES; NANOCRYSTALS; PHOTOCATHODE; ADSORPTION;

D O I：

10.1039/c4ra12127a

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Uniform-sized and monodiperse cerium dioxide porous hollow spheres (CeO2-PH) based on the Ostwald ripening process were fabricated by a simple solvothermal method in the absence of any templates. The structure and morphology of CeO2-PH and CeO2-NP (cerium dioxide nanoparticles) were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), field emission scanning electron microscopy (FESEM), and Brunauer-Emmett-Teller (BET) surface area analysis. The average diameter of face-centered cubic (fcc) phase CeO2-PH was ca. 160 nm with a high specific surface area, and it is composed of small crystal grain particles (ca. 10 nm). Furthermore, CeO2-PH has high activity for the evaluation of acetaldehyde decomposition. Optical, defect, and chemical state properties were characterized by Raman spectra, ultraviolet-visible absorption spectroscopy (UV-vis), and X-ray photoelectron spectroscopy (XPS). The presence of Ce3+ ions narrowed the band gap of CeO2-PH, resulting in the high light harvesting. The large amount of oxygen vacancy defects provided many activity sites on CeO2-PH in the photocatalytic process. The formation scheme and photocatalyic mechanism will be discussed in this paper.

引用

页码：62255 / 62261

页数：7

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