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

<table>XRD patterns of all samples ((a) the uncalcined samples, (b) the calcined samples).</table>

International Journal of Photoenergy

Figure 1: Sol-Gel to Prepare Nitrogen Doped TiO<sub>2</sub> Nanocrystals with Exposed {001} Facets and High Visible-Light Photocatalytic Performance 