高等学校化学学报

高等学校化学学报 ›› 2012, Vol. 33 ›› Issue (09): 2047.doi: 10.3969/j.issn.0251-0790.2012.09.030

• 物理化学 • 上一篇    下一篇

离子液体中铜纳米粒子膜的电沉积制备及表面增强拉曼光谱

杨凤珠, 徐敏敏, 袁亚仙, 梅金华, 姚建林, 顾仁敖   

  1. 苏州大学材料与化学化工学部, 苏州 215123
  • 收稿日期:2011-12-15 出版日期:2012-09-10 发布日期:2012-08-14
  • 通讯作者: 姚建林,男,博士,教授,主要从事光谱电化学研究.E-mail:jlyao@suda.edu.cn E-mail:jlyao@suda.edu.cn
  • 基金资助:

    国家自然科学基金(批准号: 21073128, 21033007, 20973120)资助.

Electrodeposition of Cu Nanoparticles Layers in Ionic Liquid and Surface Enhanced Raman Spectroscopic Properties

YANG Feng-Zhu, XU Min-Min, YUAN Ya-Xian, MEI Jin-Hua, YAO Jian-Lin, GU Ren-Ao   

  1. College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
  • Received:2011-12-15 Online:2012-09-10 Published:2012-08-14
  • Contact: Jian-Lin Yao E-mail:jlyao@suda.edu.cn

PDF (PC)

被引次数

31

摘要：

采用恒电位方法研究了室温离子液体1-丁基-3-甲基咪唑氟硼酸盐([BMIM]BF4)中氧化铟锡(ITO)电极表面Cu的沉积过程. 结果表明, Cu2+在ITO表面经中间产物Cu+还原为Cu. 采用XRD和SEM对不同电位下沉积层的组成和结构进行了考察. 结果表明, 表面组成和结构与沉积电位有关. 在较正电位下沉积所得为Cu/Cu2O的混合纳米粒子; 在较负电位下为Cu纳米粒子. 随着沉积电位逐渐变负, 其形貌经历了花状、 棒状向球形纳米粒子转变的过程, 且所得沉积膜逐渐变得致密, 其中Cu纳米粒子膜表现出较强的表面增强拉曼散射(SERS)活性, 并且SERS信号均一.

关键词: 离子液体, 铜纳米粒子膜, 电沉积, 表面增强拉曼光谱

Abstract:

The electrodeposition of Cu layers were investigated in 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIM]BF4) ionic liquid on ITO electrodes by constant potential method. The results indicate that Cu2+ undergoes two one-electron reduction processes, involving the transformation to Cu+ and the deposition of Cu. The XRD and SEM were employed to characterize the composition and surface morphology of the deposition layers, indicating that they were strongly depended on the applied potentials. The mixture nanoparticles of Cu and Cu2O was obtained at relative positive potentials, while pure Cu layer was formed at extremely negative potentials. With negative movement of applied potentials, the surface layer became more compact and the morphology underwent a process from flower-like, rod-like to spherical particles. SERS detection of pyridine on the Cu layer was performed, suggesting its high activity and uniformity as a SERS substrate.

Key words: Ionic liquid, Cu nanoparticles layer, Electrodeposition, Surface enhanced Raman spectroscopy

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