Synthesis and Characterization of Doped Ti02 Nanoparticles by the Sol-Gel Method and Investigation of Photocatalytic Activity

Cu^2+,ce^3+-doped nanostructure tio2-coated nd^3+ (tio2/nd^3+) were prepared by sol-gel method. tio2 were synthesized by the sol-gel method using tetra n-butyl orthotitanat (tbt) as a precursor. the prepared nanoparticles characterized by ft-ir, xrd, sem- eds and tem. the xrd showed that the major phase of nanocomposite is anatase. the morphology of the tio2/nd^3+/cu^2+and tio2/nd^3 +/ce^3+ microsphere was investigated using sem. the tem shows that the size of tio2/nd^3+/cu^2+and tio2/ nd^3+/ce^3+were 8-10 nm. moreover, particle shapes were spherical. ir spectrum indicated that ti-o bond-formed in the chitosan-tio2nano composite. acid red 151(ar 151) removed photo-chemically by adding doped tio2nanoparticle and h2o2 in the presence of the uv radiation. the results showed that the photo-degradation percentage decreased as oxidant concentration increases. the maximum degradation percentage (h2o2 0.2m) was about 96% tio2/ nd^3+catalyst. the result also showed that the kinetics model reaction in presence of both catalysts followed the fromof pseudo-second order equation presented by blanchard.