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| Semiconductor photocatalyst, TiO2 semiconductor photocatalysts with high photocatalytic activity, good stability, the advantages of the human body without toxicity has been the focus and in-depth study. TiO2 band gap wider, only below 400nm UV excitation, namely the use of the ultraviolet part of sunlight, you can not make full use of solar energy, and the photocatalytic reaction efficiency is not high, it is difficult to scale to promote the use of TiO2 photocatalysts. In recent years researchers in order to overcome these shortcomings, an extension of the response of TiO2 in the visible region, to improve the efficiency of the photocatalytic reaction done a lot of TiO2 modified. N, Fe codoped modified. Titanium source, tetrabutyl titanate, and Fe (NO3) 3 • 9H2O to do the iron source, and urea do nitrogen by sol - gel prepared by the iron and nitrogen codoped nanometer TiO2 photocatalyst. Ratio of raw materials, the calcination temperature of TiO2 nanoparticles to examine the crystal composition, particle size on the catalytic activity. |
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