Sol-Gel to Prepare Nitrogen Doped TiO<sub>2</sub> Nanocrystals with Exposed {001} Facets and High Visible-Light Photocatalytic Performance

<table>The effect of catalyst concentration on the photocatalytic degradation efficiencies.</table>

International Journal of Photoenergy

Figure 7: Sol-Gel to Prepare Nitrogen Doped TiO<sub>2</sub> Nanocrystals with Exposed {001} Facets and High Visible-Light Photocatalytic Performance 