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.
引用
收藏
页码：801 / 806
页数：5
相关论文
共 22 条
[11]  
Kandiel T.A., Ismail A.A., Bahnemann D.W., Mesoporous TiO<sub>2</sub> nanostructures: a route to minimize Pt loading on titania photocatalysts for hydrogen production, 13, 45, pp. 20155-20161, (2011)
[12]  
Zhou Y., Schattkaj H., Antonietti M., Room-temperature ionic liquids as template to monolithic mesoporous silica with wormlike pores via a Sol-Gel nanocasting technique, 4, 3, pp. 477-481, (2004)
[13]  
Eun H.C., Suk-In H., Dong J.M., Preparation of thermally stable mesostructured nano-sized TiO<sub>2</sub> particles by modified Sol-Gel method using ionic liquid, 123, 1-2, pp. 84-89, (2008)
[14]  
Song H.B., Zhou G.W., Wang C.F., Et al., Synthesis and photocatalytic activity of nanocrystalline TiO<sub>2</sub> co-doped with nitrogen and cobalt (II), 39, 2, pp. 747-758, (2013)
[15]  
Kirit S., Dimple S., Characterization of nanocrystalline cobalt doped TiO<sub>2</sub> Sol-Gel material, 352, 11, pp. 224-228, (2012)
[16]  
Sang H.X., Tian Y., Wang X.T., Et al., Photocatalytic H<sub>2</sub> evolution from glycerol solution over Bi<sup>3+</sup>-doped TiO<sub>2</sub> nanoparticles, 27, 12, pp. 1283-1288, (2012)
[17]  
Sun J., Liu S.X., Preparation of lanthanum-doped TiO<sub>2</sub> film and its application for gaseous toluene removal, 25, 9, pp. 928-934, (2010)
[18]  
Li J.G., Robert B., Masaaki I., Et al., Cobalt-doped TiO<sub>2</sub> nanocrystallites: Radio-Frequency thermal plasma processing, phase structure, and magnetic properties, 113, 19, pp. 8009-8015, (2009)
[19]  
Wu Y.Q., Lu G.X., Li S.B., The preparation, optimization and photocatalytic properties of CoO<sub>x</sub>-modified TiO<sub>2</sub> photocatalysts for hydrogen generation from photocatalytic water splitting, 3, 21, pp. 309-314, (2005)
[20]  
Lee A.C., Lin R.H., Yang C.Y., Et al., Preparations and characterization of novel photocatalysts with mesoporous titanium dioxide (TiO<sub>2</sub>) via a Sol-Gel method, 109, 2-3, pp. 275-280, (2008)
123