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Fe₂O₃/TiO₂纳米材料的制备及其紫外-可见光催化性能

Study on the photo-catalytic efficiency of Fe₂O₃/TiO₂ nano-composite under UV and visible light

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【Author】 LIU Zong-yao~(1,2),LI Li-qing~(1,3),TANG Xin-cun~2,LIU Chong-yang~1,GAO Zhao~1,WANG Xiao-gang~1(1.College of Environmental Science and Engineering,Hunan University,Changsha 410082,China;2.College of Chemistry and Chemical Engineering of Central South University,Changsha 410083,China;3.School of Energy Science and Engineering,Central South University,Changsha 410083,China)

【机构】湖南大学环境科学与工程学院；中南大学化学与化工学院；湖南大学环境科学与工程学院湖南长沙410082；湖南长沙410083；湖南长沙410082；中南大学能源科学与工程学院；

【摘要】采用溶胶-凝胶法制备了不同Fe含量的纳米Fe2O3/TiO2复合光催化材料,并用X射线衍射和透射电镜研究了样品的晶体结构和形貌,分别在紫外和可见光下研究了不同Fe含量复合催化剂的光催化降解甲基橙的活性。结果表明在Fe复合比例较低时,样品为锐钛矿结构;在紫外光情况下,最佳Fe2O3/TiO2复合比例为0.5%,在比例为10%情况下催化效果也比较好;而在可见光情况下,最佳Fe2O3/TiO2复合比例为0.1%。更多还原

【Abstract】 The sol-gel method is used to prepare the Fe₂O₃/TiO₂ nano-particles with various concent of Fe from 0.05% to 50%.XRD and TEM were used to characterize the crystal structure and surface appearance of the catalysts.Using methyl orange as indicator,the photo-catalytic efficiency of Fe₂O₃/TiO₂ nano-composites under UV and visible light was studied.Results showed that under UV-light the catalyst with the best photo-catalytic degradation efficiency is that one cantained 0.5% of Fe/Ti,and another one is that contained 10% of Fe/Ti,which was different from the historic reports.Under the visible light,the best efficient photo-catalyst for degradation is thatcontained 0.1% of Fe/Ti.更多还原