| TiO_2纤维的制备、表征及其光催化活性 |
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| 引用本文： | 黄垒,彭峰,余皓,王红娟.TiO_2纤维的制备、表征及其光催化活性[J].石油化工,2007,36(1):78-82. |
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| 作者姓名： | 黄垒 彭峰 余皓 王红娟 |
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| 作者单位： | 华南理工大学,化工与能源学院,广东,广州,510640 |
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| 基金项目： | 广东省自然科学基金;广东省科技厅科技计划 |
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| 摘 要： | 采用常压乙二醇法制备出在可见光下具有较高催化活性的TiO2纤维。扫描电子显微镜表征结果表明,TiO2纤维直径为0.8～2.0μm、长度为5～25μm;BET比表面积和X射线衍射表征结果表明,随焙烧温度的升高,比表面积减小,TiO2纤维晶型逐渐由锐钛矿型向金红石型转变;紫外-可见漫反射光谱分析结果表明,TiO2纤维在可见光区有明显的吸收。在可见光下对甲基橙和苯酚的降解实验表明,焙烧温度为400℃时TiO2纤维的催化活性最好,对甲基橙和苯酚的降解率分别达到90.3%和84.0%;所制备的TiO2纤维比溶胶-凝胶法制备的锐钛矿型TiO2在可见光下具有更好的催化活性,原因是其能带间隙减小和吸收波长扩展到可见光区所致。
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| 关 键 词： | 二氧化钛 纤维 乙二醇法 可见光 光催化 降解 |
| 文章编号： | 1000-8144(2006)01-0078-05 |
| 修稿时间： | 2006年8月12日 |
Preparation and Characterization and Photocatalytic Properties of TiO2 Fibre |
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| Huang Lei,Peng Feng,Yu Hao,Wang Hongjuan.Preparation and Characterization and Photocatalytic Properties of TiO2 Fibre[J].Petrochemical Technology,2007,36(1):78-82. |
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| Authors: | Huang Lei Peng Feng Yu Hao Wang Hongjuan |
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| Abstract: | TiO2 fibre was prepared by ethylene glycol(EG)method and characterized by means of SEM,TEM,BET,XRD and UV-Vis diffusere flection spectroscopy.Diameter and length of the fibre are 0.8-2.0 μm and 5-25 μm,respectively.Specific surface area of TiO2 fibre decreased rapidly with raising of calcination temperature and its crystalline phase transformed from anatase into rutile successively.The fibre can absorb visible-light strongly,which explains the photocatalytic activity of TiO2 fibre under visible-light.The fibre was applied in photocatalytic degradations of methyl orange and phenol under visible-light irradiation.Photocatalytic activity of TiO2 fibre is higher than that of TiO2 powder prepared by sol-gel method.Under optimum calcination temperature 400 ℃,degradation rates of methyl orange and phenol over TiO2 fibre can reach 90.3% and 84.0%,respectively. |
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| Keywords: | titanium dioxide fibre ethylene glycol method visible-light photocatalysis degradation |
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