Photocatalytic degradation of pentachlorophenol in aqueous solution by visible light sensitive NF-codoped TiO2 photocatalyst

In this present study, NF-codoped titanium dioxide nanocatalyst (NFTO) has been synthesized by simple sol–gel assisted solvothermal method for the effective utilization of visible light in photocatalytic reactions. Structural characterization of the photocatalyst is analyzed by XRD, UV–vis diffuse reflectance spectra (DRS), SEM and TEM. Moreover the chemical statuses of NFTO are gathered by X-ray photoelectron spectroscopy (XPS). The results show that a high surface area with photoactive anatase phase crystalline is obtained. In addition, nitrogen and fluorine atoms are doped into TiO2 crystal lattice to extend the visible light absorption and higher photocatalytic activity. The photocatalytic degradation of pentachlorophenol in aqueous solution is examined under visible light irradiation, the addition of oxidants such as PMS, PDS and H2O2 is analyzed in detail. The rate of photocatalytic degradation of pentachlorophenol is obtained in the following order: PMS > PDS > H2O2.

Schematic representation for the visible light photocatalytic process of N and F codoped TiO2.Figure optionsDownload as PowerPoint slideHighlights
► Visible light sensitive NF-codoped TiO2.
► Photocatalytic degradation of pentachlorophenol.
► Effect of oxidants on photocatalytic degradation of pentachlorophenol.
► PMS is a more efficient oxidant for the photodegradation of PCP.