Synthesis of Titanium Dioxide Brookite/Anatase Mixed-phase for Photodegradation of Pharmaceutical residuals

S.M. El-Sheikh, A.A. Ismail, T. Khedr, G. Zhang, D.D. Dionysiou
Central Metallurgical R&D Institute, EG

Keywords: Brookite/anatase, photodegradation, pharmaceutical residuals


Brookite/ anatase mixed phase titanium dioxide has been prepared with control of molar ratios of both phases via a hydrothermal method in the presence of amino acid. The contents of brookite and anatase in the TiO2 particles have been successfully controlled by simply adjusting the molar ratio of the amino acid to Ti in the reaction system. The produced (B/A TiO2) were characterized by X-ray diffraction, Raman spectroscopy, scanning electron microscopy, transmission electron microscopy, UV–Vis diffuse reflectance spectra, and N2 adsorption–desorption isotherms. The results show that the particle size of brookite and anatase was in the rangeof 41-54 and 6-40 nm, respectively. The surface areas (SBET) were varied from 28 to 39 m2/g as a result of phase formed contents. The pore diameter distribution was in the range of 2–8 nm. The photocatalytic oxidation of pharmaceutical residuals in real wastewaters is being studied and results will be presented.