| TiO2纤维光催化降解X-3B影响因素研究 |
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| 引用本文： | 刘和义,裴石光,刘贵双,陈炎.TiO2纤维光催化降解X-3B影响因素研究[J].环境科学学报,2012,32(5):1054-1059. |
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| 作者姓名： | 刘和义 裴石光 刘贵双 陈炎 |
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| 作者单位： | 南京理工大学材料科学与工程学院,南京,210094 |
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| 基金项目： | 江苏省自然科学基金(No.BK2009390);南京理工大学自主科研基金(No.2010GJPY087) |
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| 摘 要： | 采用溶胶-凝胶法及水蒸汽活化热处理工艺制备了15%(质量分数)SiO2掺杂的TiO2纤维,并利用SEM、XRD和HRTEM对其结构进行了表征.同时,以活性艳红X-3B染料水溶液为降解对象,研究了热处理温度、溶液pH值、紫外光源、溶液浓度等因素对TiO2纤维光催化活性的影响.结果表明,所制得的TiO2纤维为锐钛矿相,直径约为5～10μm;其最佳热处理温度为700℃,且在强酸(pH=2)或强碱(pH=14)条件下均表现出良好的光催化活性,并对不同浓度的X-3B溶液都有良好的降解效果,同时TiO2纤维也具有良好的可重复使用性.
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| 关 键 词： | TiO2纤维 光催化 X-3B |
| 收稿时间： | 2011/7/11 0:00:00 |
| 修稿时间： | 2011/8/15 0:00:00 |
Study on the influencing factors of photocatalytic degradation of X-3B aqueous solution by TiO2 fibers |
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| LIU Heyi,PEI Shiguang,LIU Guishuang and CHEN Yan.Study on the influencing factors of photocatalytic degradation of X-3B aqueous solution by TiO2 fibers[J].Acta Scientiae Circumstantiae,2012,32(5):1054-1059. |
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| Authors: | LIU Heyi PEI Shiguang LIU Guishuang and CHEN Yan |
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| Institution: | School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094;School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094;School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094;School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094 |
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| Abstract: | TiO2 fibers doped with 15% SiO2 were prepared by using sol-gel method followed by heat-treatment under steam atmosphere. The structures of the as-prepared TiO2 fibers were characterized by SEM, XRD and HRTEM. Photocatalytic activities of the TiO2 fibers were investigated by decomposing the active brilliant red X-3B dye aqueous solution. The effects of heat-treatment temperature, pH value, UV light source, and the X-3B solution concentration on the photocatalytic activities of TiO2 fiber were investigated. The results showed that the fibers were anatase TiO2 with diameters in the range of 5~10 μm. Optimal heat-treatment temperature for preparing TiO2 fibers was 700 ℃. The TiO2 fibers exhibited high photocatalytic efficiency on the degradation of X-3B solutions of different concentrations in condition of strong acid (pH=2) and strong alkaline (pH=14). In addition, the fibers showed good reusability. |
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| Keywords: | TiO2 fibers photocatalysis X-3B |
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