| 高活性Pt／TiO2纳米管的制备及其光催化性能 |
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| 引用本文： | 李运林,张超,王静,周蕾,梁光强,周明华.高活性Pt／TiO2纳米管的制备及其光催化性能[J].纳米技术与精密工程,2013(5):384-390. |
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| 作者姓名： | 李运林 张超 王静 周蕾 梁光强 周明华 |
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| 作者单位： | [1]南开大学环境污染过程与基准教育部重点实验室,天津300071 [2]天津市城市生态环境修复与污染防治重点实验室,天津300071 [3]南开大学环境科学与工程学院,天津300071 [4]天津大学学工部,天津300072 |
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| 基金项目： | 国家自然科学基金资助项目（51178225,21273120）;教育部博士点基金资助项目（20110031110025）;天津市自然科学基金资助项目（09JCYBJC08000）. |
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| 摘 要： | 采用电化学阳极氧化法和浸渍一提拉法成功制备了高度有序的Pt改性TiO2纳米管（Pt／TNT）阵列电极，并运用场发射扫描电子显微镜（FESEM）、X射线衍射（XRD）、x射线光电子能谱分析（XPS）、紫外可见漫反射光谱（UV—VisDRS）等手段对其进行表征，考察了其光电化学性质，并研究了该电极光电催化降解甲基橙染料废水的催化性能及其稳定性．结果表明，Pt的均匀负载成功地将TNT阵列电极的光响应范围拓宽到可见光区域，光电流密度达到负载前TNT阵列电极的18倍；Pt／TNT阵列电极对甲基橙的降解符合拟一级动力学，其反应速率常数为TNT阵列电极的3倍，这主要归结于Pt与TiO：间的肖特基势垒和纳米管阵列结构带来的较大比表面积、有效的光生电子和空穴的分离与传输和宽的光响应范围．
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| 关 键 词： | 阳极氧化法 浸渍-提拉法 铂掺杂 二氧化钛纳米管 光电催化 可见光 甲基橙 |
Fabrication and Photocatalytic Performance of Pt/TiO2 Nanotubes with High Activity |
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| Li Yunlin,Zhang Chao,Wang Jing,Zhou Lei,LiangGuangqiang,Zhou Minghua.Fabrication and Photocatalytic Performance of Pt/TiO2 Nanotubes with High Activity[J].Nanotechnology and Precision Engineering,2013(5):384-390. |
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| Authors: | Li Yunlin Zhang Chao Wang Jing Zhou Lei LiangGuangqiang Zhou Minghua |
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| Affiliation: | 1. Key Laboratory of Pollution Processes and Environmental Criteria of Ministry of Education, Nankai University, Tianjin 300071, China; 2. Tianjin Key Laboratory of Urban Ecology Environmental Remediation and Pollution Control, Nankai University, Tianjin 300071, China; 3. College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China; 4. Department of Student Affairs, Tianjin University, Tianjin 300072, China) |
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| Abstract: | The Pt/TiO2 nanotube （Pt/TNT） arrays electrode was prepared using electrochemical anodiza- tion and dipping-pulling method. The properties of the composite electrode were characterized by field emission scanning electron microscopy （FESEM） , X-ray diffraction （ XRD ） , X-ray photoelectron spec- troscopy（XPS）, and UV-Vis diffuse reflectance spectroscopy （UV-Vis DRS）. The photoelectrochemieal properties, photoelectrocatalytic activity and stability of Pt/TNT arrays electrode for the degradation of methyl orange were investigated. The results indicate that the uniform dispersion of platinum successfully broadens the absorption spectrum of TNT arrays electrode to visible light region and the photocurrent den-sity of Pt/TNT arrays electrode is 18 times that of TNT arrays electrode. The degTadation of methyl orange on Pt/TNT arrays electrode conforms to pseudo first-order kinetics and the reaction rate constant is about 3 times that of TNT arrays electrode. The enhanced photocatalysis is ascribed to the higher surface volume ratio, the more effective separation and migration for the photogenerated electron-hole pairs, and an im- proved UV light response because of nanotubular structures and the Schottky barriers between Pt and TiO2. |
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| Keywords: | anodization method dipping-pulling method platinum doping titania nanotube photoelec- trocatalysis visible light methyl orange |
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