Photocatalytic degradation of trichloroethylene using N-doped TiO2 prepared by a simple sol–gel process
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Visible-light-driven N-doped TiO2 was prepared by a simple sol–gel process using nitric acid not only as the acid catalyst of the sol–gel reaction but also as the source of nitrogen. The photocatalytic performance of the N-doped TiO2 was investigated by using FTIR spectroscopy to monitor the degradation of trichloroethylene (TCE) during UV and visible irradiation. The photocatalytic degradation of TCE was well-reproduced several times. The activity of Ti–O–N species was supported experimentally. The N-doped TiO2 was found to be responsive to visible light and was stable during repeated runs and maintained the nitrogen species and its activity for at least four months.
KeywordsN-doped TiO2 Photocatalyst Trichloroethylene Sol–gel method Nitric acid
The authors thank Ms A. Momozawa of this university for her experimental assistance during the first stage of this study.
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