Sol-gel synthesis and photocatalytic activity of CeO2/TiO2 nanocomposites

被引：91
|
作者：
Yang, Huaming [1 ]
Zhang, Ke
Shi, Rongrong
Tang, Aidong
机构：
[1] Cent S Univ, Sch Resources Proc & Bioengn, Dept Inorgan Mat, Changsha 410083, Peoples R China
[2] Cent S Univ, Sch Chem & Chem Chem, Changsha 410083, Peoples R China
来源：
JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2007年 / 90卷 / 05期
关键词：
D O I：
10.1111/j.1551-2916.2007.01540.x
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Uniform CeO2/TiO2 composite nanoparticles with different Ce/Ti molar ratios have been successfully synthesized via the sol-gel method. The samples were characterized using differential thermal analysis (DTA), thermogravimetric analysis (TGA), X-ray diffraction (XRD), and transmission electron microscopy (TEM). The surface state analysis by means of X-ray photoelectron spectroscopy (XPS) shows that the Ti element mainly exists as a chemical state of Ti4+, while the Ce element exists as a mixture of Ce3+ and Ce4+ oxidation states. The photocatalytic degradation of methyl orange (MeO) in CeO2/TiO2 suspension was investigated. The results indicate that the CeO2/TiO2 nanocomposites show higher photocatalytic activity than pure TiO2. Photodegradation of MeO can be improved by increasing the Ce/Ti molar ratio in the initial 15 min.
引用
收藏
页码：1370 / 1374
页数：5
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