(1. 南華大學(xué) 公共衛(wèi)生學(xué)院，衡陽 421001； 2. 衡陽師范學(xué)院 化學(xué)與材料科學(xué)系，衡陽 421008； 3. 南華大學(xué) 化學(xué)化工學(xué)院，衡陽 421001)
摘 要: 利用水解沉淀法制備TiO2、N-TiO2、Zr-TiO2以及Zr和N共摻雜的納米TiO2，用TEM、XRD、XPS和UV-Vis-DRs等方法對光催化劑的結(jié)構(gòu)、元素組成和對可見光的響應(yīng)等性能進(jìn)行表征，并以甲基橙為目標(biāo)降解物，測試其光催化降解效果。結(jié)果表明，Zr摻雜能夠降低TiO2光催化劑的粒徑；Zr和N共摻雜可以起到協(xié)同作用，提高樣品的光催化活性，同時增強(qiáng)樣品在可見光區(qū)的響應(yīng)。Zr和N共摻雜TiO2在高壓汞燈光照下比TiO2具有更好的光催化效果，2%Zr和N共摻雜TiO2光照3 h后對甲基橙的降解率比純TiO2提高32%。
關(guān)鍵字: 納米TiO2；摻雜；光催化；水解沉淀法；甲基橙
（1. School of Public Health, University of South China, Hengyang 421001, China; 2. Department of Chemistry and Materials Science, Hengyang Normal University, Hengyang 421008, China; 3. School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China）
Abstract:TiO2, N-TiO2, Zr-TiO2 and Zr-N codoped TiO2 were prepared by hydrolyzation- precipitation method. Crystal structure, elemental composition and visible lights response of prepared samples were characterized by XRD, TEM, XPS, and UV-Vis-DRs, and its photocatalysis properties were studied by photocatalytical degradation of methyl orange. The results indicate that Zr doping could decrease the particle size of nanoparticles, and Zr-N co-doping has a synergistic effect that could improve the photocatalysis efficiency and the visible absorption capacity of samples. Zr-N co-doped TiO2 has higher photo-catalysis activity than TiO2 under a 250 W high pressure mercury lamp and the degradation efficiency of methyl orange for 2% Zr-N co-doped TiO2 has a 32% rise than pure TiO2 after 3 h illumination.
Key words: nano TiO2; doping; photocatalysis; hydrolyzation-precipitation method; methyl orange
