Degradation of Orange IV Dye Solution Catalyzed by PVDF/Fe3+-TiO2 Catalytic Membrane in the Presence of H2O2
A new heterogeneous PVDF/Fe3+-TiO2 catalytic membrane is prepared by sol-gel method, which had a well catalytic activity to decompose H2O2. The effect of initial pH, e initial concentration of H2O2 and Orange IV, temperature, and membrane area on the reaction rate is discussed. The PVDF/Fe3+-TiO2 catalytic membrane can effectively decolorize Orange IV in the pH range of 3.0-5.0. The optimal concentration of H2O2 is 15mmol/L. The reaction rate constant is proportional to the initial concentrations of Orange IV. The higher the temperature, the faster the reaction rate is, this reaction follows pseudo-first-order kinetics with activation energy of 1.54kJ/mol. Reuse of catalyst did not decrease the removal rate of Orange IV. The experiments of t-butanol, EDTA and XPS measurement showed that •OH, the electron hole and the ferryl are all the reactive species in the degradation of Orange IV.
Jinglong Bu, Zhengyi Jiang and Sihai Jiao
Y. J. Zhang et al., "Degradation of Orange IV Dye Solution Catalyzed by PVDF/Fe3+-TiO2 Catalytic Membrane in the Presence of H2O2", Advanced Materials Research, Vols. 150-151, pp. 1705-1709, 2011