Abstract：Nitrogen doped TiO2 has attracted much attention as nitrogen doping can widen its photo response range, realize its visible light response, improve the utilization of solar light energy and further increase its photocatalytic efficiency. The effect of nitrogen doping on the band structure in the TiO2 and the research progress on the preparation method of nitrogen doped TiO2 film and powder were reviewed. The current problems needed to be solved were summarized, and some thinking on the future development was also put forward.
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2015, Vol. 43 
