| 镧铕共掺TiO_2/复合白土光催化剂的合成及工业废水处理活性 |
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| 引用本文： | 郭莉,强小丹,高利峰,王继武.镧铕共掺TiO_2/复合白土光催化剂的合成及工业废水处理活性[J].应用化工,2011,40(4):622-626. |
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| 作者姓名： | 郭莉 强小丹 高利峰 王继武 |
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| 作者单位： | 延安大学化学,与化工学院,陕西省化学反应工程重点实验室,陕西,延安,716000 |
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| 基金项目： | 陕西省教育厅专项科研基金 |
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| 摘 要： | 以钛酸四正丁酯为原料,采用溶胶-微波法合成了La和Eu共掺型纳米TiO2粉体(La-Eu-TiO2),以甲基橙为模型污染物考察了掺杂量对光催化活性的影响。XRD分析表明,所得粉体均为锐钛矿相纳米TiO2,且La和Eu掺杂后纳米TiO2特征衍射峰宽化,强度降低;UV-vis吸收光谱表明,La和Eu掺杂后对光的吸收显著增强;光催化实验表明,La和Eu共掺杂能显著提高纳米TiO2的光催化活性,当La和Eu掺杂量分别为0.1%和0.25%时,纳米TiO2光催化剂具有较高的催化活性,自然光照下光催化氧化处理卷烟厂蒸叶车间废水,效果较好,废水COD去除率达到92.4%,且催化剂易沉降分离、重复使用性能稳定。
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| 关 键 词： | 纳米TiO2 活性白土 镧铕掺杂 溶胶-微波法 光催化性能 |
Preparation of La-Eu-codoping/active bleaching clay composite photocatalyst and its photocatalytic property in factory wastewater |
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| GUO Li,QIANG Xiao-dan,GAO Li-feng,WANG Ji-wu.Preparation of La-Eu-codoping/active bleaching clay composite photocatalyst and its photocatalytic property in factory wastewater[J].Applied chemical industry,2011,40(4):622-626. |
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| Authors: | GUO Li QIANG Xiao-dan GAO Li-feng WANG Ji-wu |
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| Affiliation: | GUO Li,QIANG Xiao-dan,GAO Li-feng,WANG Ji-wu(Shaanxi Key Laboratory of Chemical Reaction Engineering,Department of Chemistry & Chemical Engineering,Yan'an University,Yan'an 716000,China) |
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| Abstract: | La-Eu codoping nano-TiO2 catalyst was synthesized by microwave-assisted sol process.All of the as-synthesized samples were indicated to be pure anatase phase nano-TiO2 under XRD measurement and its diffraction peak broadened obviously after La-Eu codoping.UV-vis absorption spectra demonstrated that the as-synthesized samples had the absorption intensity increased after La-Eu doping.Photocatalytic experiment results showed that photocatalytic activity of TiO2 increased obviously after Fe and Ce codoping.When... |
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| Keywords: | nano-TiO2 active bleaching clay La-Eu-codoping microwave-assisted sol process photocatalytic activity |
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