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过程工程学报 ›› 2015, Vol. 15 ›› Issue (4): 683-687.DOI: 10.12034/j.issn.1009-606X.215207

• 材料工程专栏 • 上一篇    下一篇

纳米TiO2/CNT/ZrO2膜电极的制备及其对2-吡啶甲醛的电催化还原

秦国旭 程东 李雷 张敏 万新军   

  1. 巢湖学院化学与材料工程学院 巢湖学院化学与材料工程学院 巢湖学院化学与材料工程学院 巢湖学院化学与材料工程学院 安徽巢湖大学化工与生命学院
  • 收稿日期:2015-05-07 修回日期:2015-07-01 出版日期:2015-08-20 发布日期:2015-08-20
  • 通讯作者: 秦国旭

Preparation of Nano-TiO2/CNT/ZrO2 Film Electrode and Its Electrocatalytic Reduction Property to 2-Pyridinaldehyde

QIN Guo-xu CHENG Dong LI Lei ZHANG Min WAN Xin-jun   

  1. College of Chemistry and Materials engineering, Chaohu Colleg College of Chemistry and Materials engineering, Chaohu Colleg College of Chemistry and Materials engineering, Chaohu Colleg College of Chemistry and Materials engineering, Chaohu Colleg Dept. Chemical Engineering and life science, Chaohu College
  • Received:2015-05-07 Revised:2015-07-01 Online:2015-08-20 Published:2015-08-20
  • Contact: QIN Guo-xu

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被引次数

1

摘要： 通过溶胶-凝胶法在Ti表面修饰一层纳米TiO2/CNT/ZrO2复合膜，采用循环伏安和电解合成法研究了复合膜电极在离子液体1-甲基-3-乙基咪唑四氟硼酸盐([EMI]BF4)中对2-吡啶甲醛的电催化还原活性. 结果表明，复合膜为多孔网状结构，粒径约20 nm的TiO2和ZrO2晶粒负载在管径40~60 nm的碳纳米管(CNT)上，纳米TiO2中掺杂ZrO2和CNT后电极催化性能显著改善. 在[EMI]BF4中，控制电位为-1.40 V，用复合膜电极作阴极，Ti(IV)/Ti(III)氧化还原电对作为媒质间接电还原2-吡啶甲醛为2-哌啶甲醇，平均电流效率为85.6%，产率为83%. 反应机理为电化学偶联随后化学催化反应.

关键词: 电催化还原, 离子液体, 纳米TiO2/CNT/ZrO2, 电极, 2-吡啶甲醛

Abstract: Nano-TiO2/CNT/ZrO2 complex film was prepared by sol-gel process, on the nanoTiO2/CNT/ZrO2 composite film electrode, electrocatalytic reduction of 2-pyridinaldehyde in the ionic liquid electrolyte of 1-ethyl-3-methylimidazolium tetrafluoroborate ([EMI]BF4) was studied by cyclic voltammetry and bulk electrolysis. The results showed that the composite film had a porous mesh structure, TiO2 and ZrO2 particles were about 20 nm, which were loaded on carbon nanotubes (CNT) with the diameter of about 40~60 nm, the catalytic performance of nano-TiO2 modified by ZrO2 and CNT was greatly improved. In the indirect electroreduction of 2-pyridinaldehyde to 2-piperidinemethanol by Ti(IV)/Ti(III) redox system on nanoTiO2/CNT/ZrO2 complex film surface in [EMI]BF4, the yield and current efficiency were approximately 83% and 85.6% at -1.40 V, respectively. The electrode reaction mechanism was the called catalytic mechanism.

Key words: electrocatalytic reduction, ionic liquid, nano-TiO2/CNT/ZrO2, electrode, 2-pyridinaldehyde

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