| 多壁碳纳米管负载TiO_2复合器件可见光光催化降解RhB |
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| 引用本文： | 汪青,尚静,赵凤伟,李静,何松洁.多壁碳纳米管负载TiO_2复合器件可见光光催化降解RhB[J].分子催化,2010,24(6). |
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| 作者姓名： | 汪青 尚静 赵凤伟 李静 何松洁 |
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| 作者单位： | 北京大学环境科学与工程学院,环境模拟与污染控制国家重点联合实验室,北京,100871 |
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| 基金项目： | 国家重点基础研究发展计划(973计划)(2002CB410802); 国家自然科学基金(20407002); 环境模拟与污染控制国家重点联合实验室(北京大学)专项基金 |
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| 摘 要： | 采用溶胶-凝胶法制备了多壁碳纳米管(MWCNTs)负载的ITO/MWCNTs-TiO2/ITO复合器件,利用SEM、XPS、UV-Vis光谱等技术对复合样品进行形貌和结构表征,以液相罗丹明B(RhB)的可见光光催化降解为探针反应,评价MWCNTs-TiO2复合薄膜的催化活性.XPS结果表明MWCNTs与TiO2之间没有形成Ti-C键.I-V特性表明负载了MWCNTs的ITO/MWCNTs-TiO2/ITO复合器件的光电流增强.与空白TiO2薄膜相比,MWCNTs-TiO2复合薄膜的可见光光催化降解RhB的速率提高了3.2倍.MWCNTs并没有掺杂到TiO2晶格中,而是起到了类似光敏剂的作用,可在可见光激发下将导带电子转移到TiO导带上,经一系列反应降解RhB有机物.
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| 关 键 词： | 二氧化钛 多壁碳纳米管 可见光 光催化 罗丹明B |
| 收稿时间： | 2010/9/23 0:00:00 |
| 修稿时间： | 2010/10/19 0:00:00 |
Visible-light photocatalytic degradation of rhodamine B over MWCNTs-TiO2 composite catalysts device |
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| WANG Qing,SHANG Jing,ZHAO Feng-wei,LI Jing,HE Song-jie.Visible-light photocatalytic degradation of rhodamine B over MWCNTs-TiO2 composite catalysts device[J].Journal of Molecular Catalysis (China),2010,24(6). |
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| Authors: | WANG Qing SHANG Jing ZHAO Feng-wei LI Jing HE Song-jie |
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| Institution: | WANG Qing,SHANG Jing1),ZHAO Feng-wei,LI Jing,HE Song-jie(State Key Joint Laboratory of Environmental Simulation and Pollution Control,College of Environmental Sciences and Engineering,Peking University,Beijing 100871,China) |
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| Abstract: | Multi-walled carbon nanotubes(MWCNTs) and TiO2 composite catalysts device-ITO/MWCNTs-TiO2/ITO,was prepared by a sol-gel method coated on indium tin oxide(ITO) substrate.The surface morphology and properties of devices were characterized by SEM,XPS and UV-Vis spectrophotometer.We employed photocatalytic degradation of rhodamine B(RhB) under visible light irradiation as the probe reaction to evaluate its photocatalytic activity.The XPS spectra indicated that Ti-C structures did not form between MWCNTs and TiO... |
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| Keywords: | Titanium dioxide Multi-wall carbon nanotubes Visible-light Photocatalysis Rhodamine B |
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