title: Photocatalytic parameters and kinetic study for degradation of dichlorophenol-indophenol (DCPIP) dye using highly active mesoporous TiO2 nanoparticles.
abstract: Highly active mesoporous TiO2 of about 6nm crystal size and 280.7m(2)/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.
authors.affiliation: Fabrication Technology Department, Advanced Technology and New Materials Research Institute (ATNMRI), City of Scientific Research and Technology Applications (SRTA-City), New Borg El-Arab City, Alexandria, Egypt. Electronic address: heshamaterials@hotmail.com.
authors.forename: H A
authors.initials: HA
authors.lastname: Hamad
authors.affiliation: Materials Science Department, Institute of Graduate Studies and Research (IGSR), Alexandria University, 21526 Alexandria, Egypt.
authors.forename: W A
authors.initials: WA
authors.lastname: Sadik
authors.affiliation: Fabrication Technology Department, Advanced Technology and New Materials Research Institute (ATNMRI), City of Scientific Research and Technology Applications (SRTA-City), New Borg El-Arab City, Alexandria, Egypt.
authors.forename: M M
authors.initials: MM
authors.lastname: Abd El-Latif
authors.affiliation: Electronic Materials Department, Advanced Technology and New Materials Research Institute (ATNMRI), City of Scientific Research and Technology Applications (SRTA-City), New Borg El-Arab City, Alexandria, Egypt.
authors.forename: A B
authors.initials: AB
authors.lastname: Kashyout
authors.affiliation: Materials Science Department, Institute of Graduate Studies and Research (IGSR), Alexandria University, 21526 Alexandria, Egypt.
authors.forename: M Y
authors.initials: MY
authors.lastname: Feteha
mesh_terms: D015086:2,6-Dichloroindophenol / Q000737:chemistry*; D007700:Kinetics; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D008956:Models, Chemical; D053758:Nanoparticles / Q000737:chemistry*; D055668:Photochemical Processes; D017550:Spectroscopy, Fourier Transform Infrared; D014025:Titanium / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: C009495:titanium dioxide; D015086:2,6-Dichloroindophenol; D014025:Titanium
keywords: Kinetics; Mesoporous TiO(2); Organic dye; Photocatalytic degradation