Photocatalytic degradation of trichloroethylene using N-doped TiO2 prepared by a simple sol-gel process

摘要

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.