| 微乳法制备Fe-TiO_2纳米晶复合体及光催化性能 |
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| 引用本文： | 马明远,李佑稷,陈伟,李雷勇.微乳法制备Fe-TiO_2纳米晶复合体及光催化性能[J].环境污染治理技术与设备,2010(5):1041-1046. |
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| 作者姓名： | 马明远 李佑稷 陈伟 李雷勇 |
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| 作者单位： | 吉首大学化学化工学院,吉首416000 |
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| 基金项目： | 湖南省教育厅青年基金项目（08B063）; 吉首大学研究生基金项目（08JDY022） |
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| 摘 要： | 采用微乳法制备铁掺杂TiO2纳米晶（Fe-TiO2）复合体,通过热重-差热（TG-DTA）、X射线衍射（XRD）、扫描电镜（SEM）和紫外漫反射光谱（DRS）等对其结构和形态进行表征;以亚甲基蓝溶液（MB）为标准模拟降解物,对Fe-TiO2,纯TiO2和P25光催化降解性能进行评价。结果表明,Fe-TiO2的光催化活性明显〉P25,原因是Fe掺杂不仅能抑制TiO2晶粒生长,提高TiO2的热稳定性和比表面积,而且能够拓展TiO2的吸收波长范围至可见光区,提高了Ti3＋离子浓度,降低了光生载流子的复合几率。
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| 关 键 词： | Fe-TiO2 纳米晶复合体 亚甲基蓝 光催化活性 |
Preparation and photoactivity of Fe-TiO_2 nanocrystalline composites by miniemulsion method |
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| Ma Mingyuan Li Youji Chen Wei Li Leiyong.Preparation and photoactivity of Fe-TiO_2 nanocrystalline composites by miniemulsion method[J].Techniques and Equipment for Environmental Pollution Control,2010(5):1041-1046. |
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| Authors: | Ma Mingyuan Li Youji Chen Wei Li Leiyong |
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| Institution: | Ma Mingyuan Li Youji Chen Wei Li Leiyong (College of Chemistry and Chemical Engineering,Jishou University,Jishou 416000,China) |
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| Abstract: | Nanocrystalline Fe-TiO2 composites were prepared by the miniemulsion method.The obtained photocatalysts were characterized by thermogravimetric-differential thermal analysis（TG-DTA）,x-ray diffraction（XRD）,scan electronic microphotograph（SEM） and diffuse reflection spectrum（DRS）.Photoactivities of Fe-TiO2,TiO2 and P25 were evaluated by degradation of methylene blue（MB） under UV irradiation.The results show that the photoactivity of Fe-TiO2 is more than that of P25.This is attributed to the fact that the addition of Fe not only retains crystalline growth,improves thermostabilities and surface areas of Fe-TiO2,but also shifts the excited wavelength of TiO2 to visible light regions,produces the high content of Ti3＋ ions and decreases recombination ratio of photo-generated current carrier. |
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| Keywords: | Fe-TiO2 nanocrystalline composite methylene blue photocatalytic activity |
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