International Journal of Photoenergy / 2012 / Article / Fig 4

Research Article

Nitrogen-Doped Photocatalyst Prepared by Mechanochemical Method: Doping Mechanisms and Visible Photoactivity of Pollutant Degradation

Figure 4

Effect of NH4F concentration on the UV-Vis-DRS of the NF series catalysts (NF-0, NF-37, NF-74, NF-148, and NF-370 represent the NF series catalyst calcined in the presence of NH4F; the dosages of NH4F were 0, 0.37, 0.74, 1.48, and 3.70 g, resp.; the sample BLANK was the raw TiO2 directly calcined without milling (TO400)).
960726.fig.004

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