Thermally stable ordered mesoporous CeO2/TiO2 visible-light photocatalysts

被引：153
作者：
Li, Guisheng
Zhang, Dieqing
Yu, Jimmy C. [1 ]
机构：
[1] Chinese Univ Hong Kong, Dept Chem, Environm Sci Programme, Shatin, Hong Kong, Peoples R China
[2] Chinese Univ Hong Kong, Dept Chem, Ctr Novel Funct Mol, Shatin, Hong Kong, Peoples R China
来源：
PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2009年 / 11卷 / 19期
关键词：
THIN-FILMS; TITANIA; SOL; DEGRADATION; FABRICATION; MECHANISMS; NANOHYBRID; OXIDATION; OXIDES; RAMAN;
D O I：
10.1039/b819167k
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：
Thermally stable, ordered mesoporous CeO2/TiO2 (Ce/Ti molar ratio = 0.05) visible-light photocatalysts have been fabricated by the evaporation-induced self-assembly method. Introducing highly dispersed CeO2 species into the mesoporous TiO2 framework can effectively extend the response of TiO2 to the visible-light region and improve the thermal stability of the mesoporous TiO2. The products calcined at 500 degrees C exhibit superior photocatalytic performance in the photochemical degradation of methylene blue under visible-light irradiation. The products are characterized by using X-ray difraction (XRD), Brunauer-Emmett-Teller (BET), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), Raman, photo-luminescent (PL), and ultraviolet-visible-light reflectance (UV-vis) spectroscopy. The relationship between the physicochemical property and the photocatalytic performance of the as-prepared samples is discussed.
引用
收藏
页码：3775 / 3782
页数：8
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