Jump to Main Content
Photocatalytic parameters and kinetic study for degradation of dichlorophenol-indophenol (DCPIP) dye using highly active mesoporous TiO2 nanoparticles
- Hamad, H.A., Sadik, W.A., Abd El-latif, M.M., Kashyout, A.B., Feteha, M.Y.
- Journal of environmental sciences (China) 2016 v.43 pp. 26-39
- Fourier transform infrared spectroscopy, X-ray diffraction, catalysts, differential scanning calorimetry, hydrolysis, kinetics, mathematical models, nanoparticles, pH, photocatalysis, porous media, scanning electron microscopy, surface area, temperature, thermogravimetry, titanium, titanium dioxide, transmission electron microscopy, ultraviolet radiation
- Highly active mesoporous TiO2 of about 6nm crystal size and 280.7m²/g specific surface areas has been successfully synthesized via controlled hydrolysis of titanium butoxide at acidic medium. It was characterized by means of XRD (X-ray diffraction), SEM (scanning electron microscopy), TEM (transmission electron microscopy), FT-IR (Fourier transform infrared spectroscopy), TGA (thermogravimetric analysis), DSC (differential scanning calorimetry) and BET (Brunauer–Emmett–Teller) surface area. The degradation of dichlorophenol-indophenol (DCPIP) under ultraviolet (UV) light was studied to evaluate the photocatalytic activity of samples. The effects of different parameters and kinetics were investigated. Accordingly, a complete degradation of DCPIP dye was achieved by applying the optimal operational conditions of 1g/L of catalyst, 10mg/L of DCPIP, pH of 3 and the temperature at 25±3°C after 3min under UV irradiation. Meanwhile, the Langmuir–Hinshelwood kinetic model described the variations in pure photocatalytic branch in consistent with a first order power law model. The results proved that the prepared TiO2 nanoparticle has a photocatalytic activity significantly better than Degussa P-25.