Photocatalytic Destruction of Nitrogen Monoxide over La3+ and N Co-doped SrTiO3 Powders under Visible Light Irradiation
来源期刊：JOURNAL OF RARE EARTHS2004年第5期
论文作者：王金淑 马淑云 王国红
Key words：lanthanum; nitrogen; co-doping; SrTiO3; visible active; photocatalyst; rare earths;
Abstract: Lanthanum and nitrogen co-doped SrTiO3 was prepared by a mechanochemical reaction using SrTiO3, urea and La2O3 as the raw materials. The samples were characterized by X-ray diffraction, X-ray photoelectron spectrometer, transmission electron microscopy, and nitrogen adsorption-desorption isotherm measurements. Lanthanum doping could increase the doping content of nitrogen in the sample. The sample prepared with 0.2 mol% La2O3, 22 mol% urea and 77.8 mol% SrTiO3 by mechanochemical reaction, which has nearly the same nitrogen and lanthanum doping fractions, exhibited high photocatalytic activities. Under the irradiation of light with wavelength larger than 400, and 290 nm, the photocatalytic activity of nitrogen and lanthanum co-doped SrTiO3 were 2.6 and 2 times greater than that of pure SrTiO3.
王金淑1，马淑云2，王国红1
(1.School of Materials Science and Engineering,Beijing University of Technology,Beijing,100022,China;
2.Zhengzhou Tianma Micropowder Co.Ltd,Shangjie District,Zhengzhou,450041,China)
Abstract:Lanthanum and nitrogen co-doped SrTiO3 was prepared by a mechanochemical reaction using SrTiO3, urea and La2O3 as the raw materials. The samples were characterized by X-ray diffraction, X-ray photoelectron spectrometer, transmission electron microscopy, and nitrogen adsorption-desorption isotherm measurements. Lanthanum doping could increase the doping content of nitrogen in the sample. The sample prepared with 0.2 mol% La2O3, 22 mol% urea and 77.8 mol% SrTiO3 by mechanochemical reaction, which has nearly the same nitrogen and lanthanum doping fractions, exhibited high photocatalytic activities. Under the irradiation of light with wavelength larger than 400, and 290 nm, the photocatalytic activity of nitrogen and lanthanum co-doped SrTiO3 were 2.6 and 2 times greater than that of pure SrTiO3.
Key words:lanthanum; nitrogen; co-doping; SrTiO3; visible active; photocatalyst; rare earths;
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