Preparation of TiO2-ZSM-5 zeolite for photodegradation of EDTA

Doping of TiO2 into ZSM-5 zeolite has been achieved by impregnation and solid-solid interaction methods. The produced samples were characterized using X-ray diffraction (XRD), ultraviolet and visible spectroscopy (UV-vis), the Fourier transform infrared (FT-IR) and surface area measurement. The results show that the incorporation of titanium into framework of ZSM-5 using impregnation method is higher than that of solid-solid interaction method. The photocatalytic tests were carried out for degradation of EDTA. The results indicate that photodegradation of EDTA by impregnation method is much better than that of solid-solid interaction method. The EDTA removal efficiency is 99.9% at 3 x 10(-3) M EDTA concentration using impregnation method whereas 75% at 3 x 10(-5) M EDTA concentration using solid-solid method. (c) 2005 Elsevier B.V. All rights reserved.