关键词: 纳米TiO_2;铁铈掺杂;溶胶-微波法;活性白土;光催化性能

Abstract: Fe-Ce codoping nano-TiO_2 catalyst was synthesized by microwave-assisted sol process.XRD,XPS and UV-vis absorption spectroscopy techniques were applied to investigate spectrum properties of Fe-Ce codoping TiO_2 nanoparticles. All of the as-synthesized samples were indicated to be pure anatase phase nano-TiO_2 under XRD measurement and its' diffraction peak broadened obviously after Fe and Ce doping. Results of XPS analysis revealed that many oxygen vacancies were produced in the surface of TiO_2 nanoparticles after Fe and Ce codoping. UV-vis absorption spectra demonstrated that the as-synthesized samples had strong and wide absorption band between 200 to 400 nm and the absorption intensity increased after Fe and Ce doping.Photocatalytic experiment results showed that titanium dioxide's photocatalytic activity increased obviously after Fe and Ce codoping.When the doping amount of Fe and Ce was 0.2% and 0.04% respectively, the as-synthesized sample exhibited high photocatalytic activity- COD removal of cigarette factory wastewater was 89.8% and composite catalyst could be easily recovered for circulation use.

Key words: nano-TiO_2;Fe-Ce-codoping;microwave-assisted sol process;active bleaching clay;photocatalytic activity