稀土-金属共掺杂纳米TiO_2的制备及其光催化性能
Preparation and Photocatalytic PropertiES of RE-metal Co-doped TiO_2 Nanoparticles
查看参考文献13篇
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文摘
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采用溶胶-凝胶法制备了稀土La~(3+)、Ce~(3+)单掺杂及La-Fe、Ce-Fe共掺杂TiO_2光催化剂,利用XRD、FE-SEM等手段对样品的结构、形貌进行了表征.以甲基橙为光催化反应模型化舍物,考察了掺杂对光催化活性的影响.实验结果表明:稀土-金属掺杂抑制了TiO_2锐钛矿相向金红石相的转变,抑制了纳米晶体的生长.掺杂后TiO_2光催化荆的光催化性能有明显提高,共掺杂TiO_2光催化剂产生了协同效应,其光催化性能优于单掺杂样品,以La 0.5%-Fe 0.05%共掺杂效果最佳. |
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其他语种文摘
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The RE single doped and co-doped TiO_2 were prepared by sol-gel method,the structure and shape were characterized by XRD,FE-SEM. The photocatalytic activities were evaluated by degradation of methyl orange. The results show that the co-doping with optimum RE and metal can restrain the transform of anatase structure to rutile structure and the growth of crystal,improve the photocatalytic efficiency. The co-doping of RE and metal show a synergistic effect for photocatalytic activity of TiO_2. The co-doped TiO_2 show higher photocatalytic activity in degradation of methyl orange than that of single doped TiO_2. Titania co-doped with La-Fe for n(La):n(TiO_2)=0.5%,n(Fe):n(TiO_2)=0.05% have the highest photocatalytic efficiency. |
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来源
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世界科技研究与发展
,2008,30(2):122-125 【扩展库】
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关键词
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二氧化钛
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共掺杂
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光催化
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协同效应
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地址
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中南大学物理科学与技术学院, 湖北, 长沙, 410083
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1006-6055 |
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学科
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化学 |
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基金
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中国博士后科学基金
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湖南省博士后基金
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文献收藏号
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CSCD:3311388
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