A parametric study of visible-light sensitive TiO2 photocatalysts synthesis via a facile sol-gel N-doping method
Date
2015
Authors
Zhang, W.
Zou, L.
Dionysiou, D.
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Journal article
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Journal of Experimental Nanoscience, 2015; 10(15):1153-1165
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In the present work, a parametric study of visible-light sensitive TiO2 via a facile sol–gel N-doping method was carried out. Visible-light activity of as-prepared products was assessed using solutions of methylene blue as model pollutants. Optimal visible-light activity was achieved at equal N-to-Ti precursor molar ratio and 350 °C calcinations. Characterisation of structural, chemical and optical properties of synthesised TiO2 photocatalysts was also undertaken to elucidate the effects of N-to-Ti precursor molar ratio and calcinations temperature on the resulting photocatalytic activity. The pH value of N-doped TiO2 sol during the preparation was also found to be an effective indicator of N-doping quality without using any post-synthesis analysis. These findings could be utilised in the successful development of TiO2 photocatalysts or their nanocomposites for cost effective solar irradiation-driven environmental technology.
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Copyright 2014 Taylor and Francis