| Fe~(3+)和Ce~(3+)共掺杂TiO_2的光谱电化学行为 |
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| 引用本文： | 余润兰,许金生,匡云飞.Fe~(3+)和Ce~(3+)共掺杂TiO_2的光谱电化学行为[J].中南大学学报(自然科学版),2008,39(6). |
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| 作者姓名： | 余润兰 许金生 匡云飞 |
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| 作者单位： | 1. 中南大学,资源加工与生物工程学院,湖南,长沙,410083
2. 衡阳师范学院,化学与材料科学系,湖南,衡阳,421008 |
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| 基金项目： | 湖南省自然科学基金资助项目
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| 摘 要： | 为开发可降解饮用水中三氯甲烷的光催化剂，采用凝胶法制备了一系列Fe^3＋和Ce^3＋共掺杂的纳米TiO2。用XRD，UV和电化学方法研究了不同Fe^3＋和Ce^3＋配比掺杂TiO2的光谱电化学行为。研究结果表明：Fe^3＋和Ce^3＋掺杂摩尔分数均小于2．0％时，TiO2总是锐钛矿相，x（Fe^3＋）为7．0％时出现少量的Fe2TiO5相，x（Ce^3＋）为7．0％时出现少量TiO2-CeO2相；固定掺杂x（Ce^3＋）为2．0％时，最佳掺杂x（Fe^3＋）为2．0％，此时，TiO2紫外吸收、吸收限红移以及注入电荷密度Qc与脱出电荷密度Qa之比都最大：固定掺杂x（Fe^3＋）为2．0％时，TiO2的紫外吸收、吸收限红移以及电荷密度Qc与脱出电荷密度Qa之比总是随着掺杂的x（Ce^3＋）的增大而增大。
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| 关 键 词： | 稀土 过渡金属离子 共掺杂 纳米二氧化钛 光谱电化学 |
Spectrum-electrochemical behaviors of Fe~(3+) and Ce~(3+) co-doped TiO_2 |
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| YU Run-lan,XU Jin-sheng,KUANG Yun-fei.Spectrum-electrochemical behaviors of Fe~(3+) and Ce~(3+) co-doped TiO_2[J].Journal of Central South University:Science and Technology,2008,39(6). |
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| Authors: | YU Run-lan XU Jin-sheng KUANG Yun-fei |
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| Institution: | YU Run-lan1,XU Jin-sheng2,KUANG Yun-fei2(1.School of Minerals Processing , Bioengineering,Central South University,Changsha 410083,China,2.Department of Chemistry , Materials Science,Hengyang Normal University,Hengyang 421008,China) |
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| Abstract: | A series of nano-TiO2 co-doped Fe 3+and Ce 3+were prepared by sol-gel method to develop a photocatalyst which can effectively resolve haloforms in drinking water.The changes of their spectrum-electrochemical performances with co-doped proportions of Fe3 +and Ce 3+were studied using XRD,UV and electrochemical method.The results indicate that TiO2 is always in anatase phase when the mole fractions of co-doped Fe 3+,Ce 3+are both less than 2.0%,a little of Fe2TiO5 and TiO2-CeO2 occur at x(Fe 3+)of 7.0%and x(Ce... |
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| Keywords: | rare earth transition metal ions co-doping nanosized titania spectrum electrochemistry |
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