Research Article
Visible Light Induced Photocatalytic Degradation of Methyl Red with Codoped Titania
Figure 5
The percentage of degradation of methyl red as function of time by N/Mn-TiO2 under different experimental parameters. (a) Effect of Dopant concentration: among all the catalysts with different dopant concentrations, 0.75 wt.% N and 0.25 wt.% Mn-TiO2 (NMN-4) exhibited 100% degradation in 150 min irradiation time. (b) Effect of pH: optimum pH was found to be 4. (c) Effect of catalyst dosage-optimum catalyst dosage was found to be 2.00 g/L. (d) Effect of initial concentration of dye: 5 mg/L of methyl red was degraded completely in 60 min by NMN-4 at pH 4 with catalyst dosage of 0.20 g.
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