高等学校化学学报

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新颖的TiO2@C核壳结构纳米纤维阵列电极制备及其在电化学传感器中的应用

陈荣生1, 胡良胜1, 张旭明1, 付继江1, 霍开富1,3, 朱剑豪3, 程介克2   

  1. 1. 武汉科技大学材料与冶金学院, 化学工程与技术学院, 武汉 430081; 2. 武汉大学化学与分子科学学院, 武汉 430072; 3. 香港城市大学物理与材料科学系, 香港
  • 收稿日期:2008-10-04 修回日期:1900-01-01 出版日期:2008-12-10 发布日期:2008-12-10
  • 通讯作者: 霍开富

Fabrication of TiO2 @C Core-shell Nanofiber Arrays Electrode and Its Appdication in Electrochemical Sensing

CHEN Rong-Sheng1, HU Liang-Sheng1, ZHANG Xu-Ming1, FU Ji-Jiang1, HUO Kai-Fu1,3*, CHU Paul-K.3, CHENG Jie-Ke2   

  1. 1. College of Materials and Metallurgy, College of Chemical Engineering and Technology, Wuhan University of Science and Technology, Wuhan 430081, China; 2. College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China; 3. Department of Physics and Materials Science, City University of Hong Kong, Hong Kong, China
  • Received:2008-10-04 Revised:1900-01-01 Online:2008-12-10 Published:2008-12-10
  • Contact: HUO Kai-Fu

摘要: 本文提出以金属钛为基底, 在丙酮蒸气和无催化剂条件下, 通过高温反应, 直接在金属钛片上一步合成出具有核壳结构的TiO2@C纳米纤维阵列. 由于TiO2@C纳米纤维阵列在金属钛片上分布均一, 与金属钛基底有良好的结合力和电接触性能, 可直接作为电化学传感器电极. 进一步的电化学检测表明, 该电极对铁氰化钾及多巴胺等物质有良好的电化学响应, 对多巴胺检测灵敏度高, 响应的线性范围为1.0×10-7~1.0×10-4 mol/L, 检测限达2.45×10-8 mol/L. 该电极有望在生物传感、环境分析及药物分析等领域发挥重要作用.

关键词: 纳米碳纤维, 化学气相沉积, 电化学传感器, 多巴胺

Abstract: In this paper we describe a new method to fabricate TiO2@C core-shell nanofiber arrays for electrochemical sensing. The TiO2@C nanofiber arrays have been produced directly on titanium surface under acetone vapor at 800 ℃. This TiO2@C core-shell nanofiber arrays have the 40 nm TiO2 core in diameter and 5—10 nm carbon shell in thickness and show good electrochemical behaviors. The cyclic voltammogram in 1.0×10-3 mol/L K3Fe(CN)6 is quasi-reversible. The amperometric response increases linearly with the increase of the concentration of dopamine in the range of 1.0×10-7—1.0×10-4 mol/L. The detection limit(S/N=3) of dopamine is 2.45×10-8 mol/L.

Key words: Carbon nanofiber, Chemical vapor deposition, Electrochemical sensor, Dopamine

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