Au@SiO2膜/Ti电极吸附吡啶的表面增强拉曼光谱研究

doi:10.13208/j.electrochem.130888

电化学（中英文） ›› 2014, Vol. 20 ›› Issue (3): 272-276. doi: 10.13208/j.electrochem.130888

• 基础电化学近期研究专辑(武汉大学陈胜利教授主编) • 上一篇下一篇

Au@SiO₂膜/Ti电极吸附吡啶的表面增强拉曼光谱研究

徐敏敏，刘可，郭清华，姚建林^*

College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, Jiangsu, China

收稿日期:2013-09-13 修回日期:2013-11-29 出版日期:2014-06-28 发布日期:2013-12-04
通讯作者: 姚建林 E-mail:jlyao@suda.edu.cn
基金资助:
国家自然科学基金项目（No. 21073128，No. 21033007，No. 20973120）和江苏省自然科学基金项目（No. BK2012187）资助

Surface Enhanced Raman Spectroscopic Studies of Pyridine Adsorbed on Ti/Au@SiO₂ Film Electrode

XU Min-min, LIU Ke, GUO Qing-hua, YAO Jian-lin^*

苏州大学材料与化学化工学部，江苏苏州 215123

Received:2013-09-13 Revised:2013-11-29 Published:2014-06-28 Online:2013-12-04
Contact: YAO Jian-lin E-mail:jlyao@suda.edu.cn

摘要/Abstract

摘要： 基于壳层隔绝纳米粒子增强拉曼光谱技术，合成了Au@SiO₂纳米粒子，并对其进行了相关表征. 结果表明，包裹的二氧化硅层连续、致密，Au@SiO₂膜/Ti电极上可获得金属钛电极上吸附吡啶分子的高质量表面增强拉曼光谱（SERS）信号. 通过Pt、Ni电极的测试，证实该信号源于吸附在基底表面的吡啶分子. 此外，Au@SiO₂膜/Ti电极上吸附吡啶分子的现场SERS光谱研究表明，在-0.1 V ~ -0.6 V电位区间，吡啶分子平躺吸附，从-0.6 V起吸附的吡啶分子由平躺逐转变为垂直，而当电位为-1.2 V时，电极表面析氢，吡啶脱附.

关键词: 表面增强拉曼光谱, 钛电极, Au@SiO₂纳米粒子, 吡啶

Abstract: This study was performed based on shell-isolated nanoparticles-enhanced Raman spectroscopy (SHINERS) technology. The Au@SiO₂ nanoparticles were prepared and characterized by TEM and cyclic voltammetry. It was shown that the shell of SiO₂ was compact. The high quality signal measured by surface enhanced Raman spectroscopy (SERS) was obtained from the adsorbed pyridine on Ti/Au@SiO₂ electrode. The origin of the SERS signals was further confirmed by testing Pt and Ni electrodes. In addition, potential dependent adsorption behavior was investigated. It was found that pyridine was adsorbed parallel on the surface from -0.1 V to -0.6 V, and converted to perpendicular adsorption from -0.6 V. At last, pyridine was desorbed from the electrode accompanied with hydrogen evolution when the potential moved to -1.2 V.

Key words: surface enhanced Raman spectroscopy, Ti electrode, Au@SiO₂ nanoparticles, pyridine

中图分类号:

O657.37

徐敏敏，刘可，郭清华，姚建林*. Au@SiO₂膜/Ti电极吸附吡啶的表面增强拉曼光谱研究[J]. 电化学（中英文）, 2014, 20(3): 272-276.

XU Min-min, LIU Ke, GUO Qing-hua, YAO Jian-lin*. Surface Enhanced Raman Spectroscopic Studies of Pyridine Adsorbed on Ti/Au@SiO₂ Film Electrode[J]. Journal of Electrochemistry, 2014, 20(3): 272-276.

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https://electrochem.xmu.edu.cn/CN/Y2014/V20/I3/272

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Au@SiO₂膜/Ti电极吸附吡啶的表面增强拉曼光谱研究

Surface Enhanced Raman Spectroscopic Studies of Pyridine Adsorbed on Ti/Au@SiO₂ Film Electrode

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