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镧或钕掺杂TiO₂可见光催化剂及其对甲基橙的降解活性

Photocatalytic Degradation Activity of Methyl Orange on TiO₂ Doped with La or Nd in Visible Light

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【Author】 LU Wei-qi~1,ZHAO Li-ming~(1,2),LIU Yi-lu~1,HUANG Xiao-rong~2(1.Department of Chemistry,Foshan University,Foshan 528000,China;2.School of Chemical and Energy Engineering,South China University of Technology,Guangzhou 510640,China)

【机构】佛山大学化学系；华南理工大学化工与能源学院广东佛山528000；广东佛山528000 华南理工大学化工与能源学院；广东广州510640；广东佛山528000；

【摘要】用溶胶-凝胶法制备的La2O3/TiO2和Nd2O3/TiO2等催化剂,在可见光下降解甲基橙活性顺序为:Nd2O3/TiO2>La2O3/TiO2>Fe2O3/TiO2>TiO2。焙烧温度为500℃的掺Nd为0.7%(摩尔分数)的催化剂活性最高。用XRD、DTG分析了催化剂的晶型结构,探讨了稀土对晶格畸变和催化活性的影响。更多还原

【Abstract】 La₂O₃/TiO₂ and Nd₂O₃/TiO₂ were prepared by Sol-Gel method.The order of their photocatalytic activity for methyl orange degradation in visible light was as follows: Nd₂O₃/TiO₂>La₂O₃/TiO₂>Fe₂O₃/TiO₂>TiO₂.The photocatalytic activity was the highest when the mol ratio of Nd/Ti in the catalyst was 0.7% and the sintering temperature was 500℃.The crystalline structure of the catalysts was analyzed by XRD and DTG,and the effect of rare earth on the lattice distortion and the photocatalytic activity of was discussed.更多还原