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] College of Physical Science and Technology, Dalian University, Daiian
[2] Liaoning Province Key Laborato ry of Bioorganic Chemistry, Dalian University, Dalian
来源：
Wuji Cailiao Xuebao/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：
Co doping; Ionic liquid; Titanium dioxide; Visible light activity;
D O I：
10.15541/jim20130586
中图分类号：
学科分类号：
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 N2 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 (λ>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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页码：801 / 806
页数：5
相关论文
共 22 条
[1]  
Samuel V., Muthukumar P., Gaikwad S.P., Et al., Synthesis of mesoporous rutile TiO<sub>2</sub>, 58, pp. 2514-2518, (2004)
[2]  
Crossland E.J.W., Noel N., Sivaram V., Et al., Mesoporous TiO<sub>2</sub> single crystals delivering enhanced mobility and optoelectronic device performance, Nature, 495, pp. 215-219, (2013)
[3]  
Zheng Q., Zhou B.X., Bai J., Et al., Self-organized TiO<sub>2</sub> nanotube array sensor for the determination of chemical oxygen demand, 20, 5, pp. 1044-1049, (2008)
[4]  
Biswas S.K., Pathak A., Pramanik N.K., Et al., Codoped Cr and W rutile nanosized powders obtained by pyrolysis of triethanolamine complexes, 34, 8, pp. 1875-1883, (2008)
[5]  
Wan B., Chen M.B., Zhou X.Y., Et al., Photoclectrocatalytic performance of Ag/TiO<sub>2-x</sub>N<sub>x</sub> nanotube, 25, 3, pp. 285-288, (2010)
[6]  
Deng L.X., Wang S.R., Liu D.Y., Et al., Synthesis, characterization of Fe-doped TiO<sub>2</sub> Nanotubes with high photocatalytic activity, 129, 3-4, pp. 513-518, (2009)
[7]  
Nakashima T., Kimizuka N., Interfacial synthesis of hollow TiO<sub>2</sub> microspheres in ionic liquids, 125, 21, pp. 6386-6387, (2003)
[8]  
Zhou Y., Antonietti M., Synthesis of very small TiO<sub>2</sub> nanocrystals in a room-temperature ionic liquid and their self-assembly toward mesoporous spherical aggregates, 125, 49, pp. 14960-14961, (2003)
[9]  
Zheng W.J., Liu X.D., Yan Z.Y., Et al., Ionic liquid-assisted synthesis of large-scale TiO<sub>2</sub> nanoparticles with controllable phase by hydrolysis of TiCl<sub>4</sub>, 3, 1, pp. 115-122, (2009)
[10]  
Han Y.D., Wang K., Xu Z.J., Et al., Preparation of mesoporous TiO<sub>2</sub> by ionic liquid modified Sol-Gel method, 40, 9, pp. 1289-1293, (2012)
123