Preparation and Properties of Co-doped TiO2 with Assistance of Ionic Liquid

被引：0
作者：
Zhang Li-Juan [1 ]
Di Lan-Bo [1 ]
Li Yan-Chun [1 ]
Zhang Xiu-Ling [1 ,2 ]
机构：
[1] Dalian Univ, Coll Phys Sci & Technol, Daiian 116622, Peoples R China
[2] Dalian Univ, Liaoning Prov Key Lab Bioorgan Chem, Dalian 116622, Peoples R China
来源：
JOURNAL OF INORGANIC MATERIALS | 2014年 / 29卷 / 08期
基金：
中国国家自然科学基金;
关键词：
ionic liquid; titanium dioxide; Co doping; visible light activity; PHOTOCATALYSTS; PHASE;
D O I：
暂无
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：
Co-doped mesoporous TiO2 photocatalysts were prepared by an ionic liquid 1-butyl-3-methylimida-zolium tetrafluoroborate ([C4MIM]BF4) modified Sol-Gel method. The effects of Co doping on the surface area, crystalline phase, chemical binding states and compositions, and absorbance of the Co-doped mesoporous TiO2 photocatalysts were studied by N-2 adsorption-desorption measurements (BET), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and UV-Vis diffuse reflectance absorption spectra (UV-Vis DRS). BET analysis showed that Co/TiO2 photocatalyst was mesoporous structure with large surface area. XRD patterns indicated that the Co-doped mesoporous TiO2 photocatalysts was anatase structure. XPS spectra indicated that the Co2+ replaced Ti4+ and entered into TiO2 lattice, which reduced the band gap of TiO2 and thereby extending the light response range to the visible region (UV-Vis spectra). Photocatalytic activity of the Co/TiO2 mesoporous photocatalysts was evaluated by photodegradation of methylene blue (MB) under visible light (lambda>420 nm). Co-doped TiO2 exhibited obvious visible light activity for MB photodegradation, and 0.3%Co/TiO2 exhibited the highest photocatalytic activity.
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收藏
页码：801 / 806
页数：6
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