Highly efficient activated carbon loaded TiO2 for photo defluoridation of pentafluorobenzoic acid

The activated carbon loaded TiO2-P25 catalysts were prepared and characterized by diffuse reflectance spectra (DRS), FT-IR, scanning electron micrograph (SEM), X-ray diffraction (XRD) and BET surface area analysis. The photocatalytic efficiency of activated carbon loaded TiO2-P25 (AC-TiO2-P25) was evaluated by UV assisted photodefluoridation of pentafluorobenzoic acid (PFBA) in aqueous medium. The catalyst exhibited higher photo defluoridation efficiency of PFBA than that of bare TiO2-P25. The various experimental parameters like concentration of PFBA, addition of oxidants, amount of catalyst and solution pH for efficient defluoridation are reported. The higher efficiency of AC-TiO2-P25 is due to synergy effect of activated carbon.

Defluoridation is more effective in 10AC-TiO2-P25 than bare TiO2-P25 and 254 nm is more effective than 365 nm. The higher efficiency of AC-TiO2-P25 is due to synergy effect of activated carbon.Figure optionsDownload high-quality image (96 K)Download as PowerPoint slide