Iron waste as an effective depend on TiO2 for photocatalytic degradation of dye waste water

In this study, preparation of Fe-TiO2 was synthesized by sol-gel method using tetraisopropoxide and hand warmer waste as precursors. The manipulation parameters including different calcination temperatures (500 °C, 600 °C and 700 °C), Fe:Ti molar ratios (0.05%, 0.1%, 0.25%, 0.5% and 1%), the pH value (3, 5.5, 9) were evaluated by photodegradation of acid red 27 (AR-27) under visible light. Reusability of the catalyst was investigated by the optimal operating parameters. Characterization of prepared catalysts by FE-SEM, HR-XRD, BET, ESCA, Zeta potential, UV-vis was investigated. Fe:Ti molar ratio 0.1 mole% calcined at 500 °C showed strip shape and high surface area. Crystal structure exhibited anatase phase and pHzpc was 5.6. There was the same trend between actual proportion of iron-doped and theoretical values. The band gap decreased as the amount of iron increased and shifted the absorbance edge to the visible light region. The results demonstrated that the best photodegradation efficiency was 0.1 mole% Fe-TiO2 calcined at 500 °C, 10 mg/L AR-27 and at pH 3. The color removal efficiency kept 89% after catalyst used for 4 times.