Abstract: The TiO2/zeolite doped with each of rare earth ions La³⁺,Nd³⁺,Yb³⁺ was prepared from tetrabutyl titanate and rare earth oxide by solgel process. The samples were characterized by XRD and IR. The effects of different zeolite sizes and doping amounts (mass fraction) of rare earth oxide on the photocatalytic degradation of pesticides dichlorvos were in vestigated. The results show that the optimum size was 0.15 nm; the optimumdoping amount of La³⁺ in TiO₂/zeolite was 3.0%. The photocatalytic degradation of TiO₂/zeolite can be improved greatly by doping rare earth ions.

Key words: doping, TiO₂/zeolite, photocatalytic degradation, pe sticides dichlorvos