Visible-light-activated nanocomposite photocatalyst of Cr2O3/SnO2

被引：27
作者：
Bhosale R. [1 ]
Pujari S. [1 ]
Muley G. [2 ]
Pagare B. [3 ]
Gambhire A. [3 ]
机构：
[1] D.B.F. Dayanad College of Arts and Science, Maharashtra, Solapur
[2] Department of Physics, Sant Gadge Baba Amravati University, Maharashtra, Amravati
[3] Department of Chemistry, Shri Anand College of Science, Maharashtra, Pathardi, Ahmednagar
来源：
Journal of Nanostructure in Chemistry | 2013年 / 3卷 / 1期
关键词：
Coprecipitation method; Coupled photocatalyst; Photocatalytic activity; Photoelectron spectroscopy;
D O I：
10.1186/2193-8865-3-46
中图分类号：
学科分类号：
摘要：
Visible-light-activated Cr2O3/SnO2 nanocomposite photocatalyst was prepared by coprecipitation method and characterized by X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, N2 adsorption-desorption measurement, and UV–vis diffuse reflectance spectroscopy. The results show that phase composition, crystallite size, Brunauer-Emmett-Teller surface area, and optical absorption of samples varied significantly with the heat treatment temperatures. The Cr2O3/SnO2 photocatalyst (the molar ratio Cr to Sn is 1:2) calcined at 400°C for 2 h exhibited maximum photocatalytic activity because it has a smaller particle size of 10.05 nm and a higher surface area of 38.75 m2/g. Under visible-light (λ > 400 nm) irradiation, the degradation rate of Rhodamine B reached 98.0% in 60 min, which is about 3.5 times higher than that of the standard P25 photocatalyst. © 2013, Bhosale et al.; licensee Springer.
引用
收藏
相关论文
共 15 条
  • [1] Hoffmann M.R., Martin S.T., Choi W., Bahnemann D.W., Environmental applications of semiconductor photocatalysis, Chem. Rev, 95, pp. 69-96, (1995)
  • [2] Khan S.U., Al-shahry M., Lngler W.B., Efficient photochemical water splitting by a chemically modified n-TiO<sub>2</sub>, Science, 297, pp. 2243-2245, (2002)
  • [3] Zhang T., Oyama T., Horikoshi S., Zhao J., Serpone N., Hidaka H., Photocatalytic decomposition of the sodium dedecylbenzene sulfonate surfactant in aqueous titania suspensions exposed to highly concentrated solar radiation and effects of additives, Appl. Catal. B: Environ, 42, pp. 13-24, (2003)
  • [4] San N., Hatipoglu A., Kocturk G., Cinar Z., Photocatalytic degradation of 4-nitrophenol in aqueous TiO<sub>2</sub> suspensions, theoretical prediction of the intermediates, J. Photochem. Photobiol. A: Chem, 146, pp. 189-197, (2002)
  • [5] Chen S., Cao G., Study on the photocatalytic reduction of dichromate and photocatalytic oxidation of dichlorvos, Chemosphere, 60, pp. 1308-1315, (2005)
  • [6] Cun W., Jincai Z., Xinming W., Bixian M., Guoying S., Ping'an P., Jiamo F., Preparation, characterization and photocatalytic activity of nano-sized ZnO/SnO<sub>2</sub> coupled photocatalysts, Appl. Catal. B: Environ, 39, pp. 269-279, (2002)
  • [7] Khan R., Kim T.J., Preparation and application of visible-light-responsive Ni-doped and SnO<sub>2</sub>-coupled TiO<sub>2</sub> nanocomposite photocatalysts, J. Hazardous Mater, 163, pp. 1179-1184, (2009)
  • [8] Guzman C., del Angel G., Gomez F., Galindo-Hernandez F., Angeles-Chavez C., Degradation of the herbicide 2,4-dichlorophenoxyacetic acid over Au/TiO<sub>2</sub>-CeO<sub>2</sub> photocatalysts: effect of the CeO<sub>2</sub> content on the photoactivity, Catal. Today, 166, pp. 146-151, (2011)
  • [9] Kanai N., Nuida T., Ueta K., Hashimoto K., Watanabe T., Ohsaki H., Photocatalytic efficiency of TiO<sub>2</sub>/SnO<sub>2</sub> thin film stacks prepared by DC magnetron sputtering, Vaccum, 74, pp. 723-727, (2004)
  • [10] Wang C., Shi H., Li Y., Synthesis and characterization of natural zeolite supported Cr-doped TiO<sub>2</sub> photocatalysts, Appl. Surf. Sci, 258, pp. 4328-4333, (2012)
12