Photocatalytic Destruction of Nitrogen Monoxide over La^3＋ and N Co-doped SrTiO3 Powders under Visible Light Irradiation

Lanthanun, and nitrogen co-doped SrTi03 was prepared by a mechanochemical reaction using SrTi03, urea and la203 as the raw materials. The samples were characterized by X-ray diffraction, X-ray photoelectron spectrometer, trans-mission 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% La203, 22 mol% urea and 77.8 mol % SrTi03 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 SrTi03 were 2.6 and 2 times greater than that of pure SrTi03.

Photocatalytic Destruction of Nitrogen Monoxide over La3+ and N Co-doped SrTiO3 Powders under Visible Light Irradiation

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.