高等学校化学学报 ›› 2012, Vol. 33 ›› Issue (01): 139.doi: 10.3969/j.issn.0251-0790.2012.01.023

• 物理化学 • 上一篇    下一篇

SnO2纳米粒子作为SERS基底的研究

侯近龙1,2, 贾祥非2, 薛向欣1, 陈雷1, 宋微1, 徐蔚青1, 赵冰1   

  1. 1. 吉林大学超分子结构与材料国家重点实验室, 长春 130012;
    2. 齐齐哈尔大学化学与化学工程学院, 齐齐哈尔 161006
  • 收稿日期:2011-03-31 出版日期:2012-01-10 发布日期:2011-12-20
  • 通讯作者: 赵冰,男,博士,教授,博士生导师,主要从事分子光谱研究.E-mail:zhaob@jlu.edu.cn E-mail:zhaob@jlu.edu.cn
  • 基金资助:

    国家自然科学基金(批准号: 20903044, 20873050, 20921003, 20973074)资助.

Surface-enhanced Raman Scattering of Molecules Adsorbed on SnO2 Nanoparticles

HOU Jin-Long1,2, JIA Xiang-Fei2, XUE Xiang-Xin1, CHEN Lei1, SONG Wei1, XU Wei-Qing1, ZHAO Bing1   

  1. 1. State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun 130012, China;
    2. College of Chemistry and Chemical Engineering, Qiqihaer University, Qiqihaer 161006, China
  • Received:2011-03-31 Online:2012-01-10 Published:2011-12-20

摘要: 采用溶胶-水热法制备了不同尺寸的SnO2纳米粒子, 并将其作为表面增强拉曼散射(Surface-enhanced Raman scattering, SERS)活性基底, 重点探讨了表面缺陷能级与SERS性能的关系. 观察到4-巯基苯甲酸(4-MBA)吸附在150 ℃水热合成的SnO2纳米粒子上的SERS 信号最强, 随着在空气中煅烧温度的升高, SERS信号逐渐减弱. 分别用透射电子显微镜、 紫外-可见光谱、 荧光光谱、 X射线衍射和X射线光电子能谱对SnO2纳米粒子进行了表征. 结果表明, SnO2纳米粒子的表面氧空位和缺陷等表面性质在增强拉曼散射性能中发挥着重要的作用, 表面氧空位和缺陷等含量越高其SERS信号就越强.

关键词: 表面增强拉曼散射, SnO2, 电荷转移, 4-巯基苯甲酸

Abstract: Pure SnO2 nanoparticles were prepared by the sol-hydrothermal method and were employed as surface-enhanced Raman scattering(SERS) active substrates. The relationships between defect levels and SERS effect of SnO2 nanoparticles were mainly investigated. The strongest SERS signals were observed when the 4-mercaptobenzoic acid molecules were adsorbed on the surface of SnO2 nanoparticles(hydrothermal pro-duct), with the increase of calcining temperature, the SERS signals became weaker. Transmission electron microscopy, UV-Vis diffuse reflectance spectroscopy, photoluminescence X-ray diffraction and X-ray photoelectron spectroscopy have been employed to investigate the SnO2 nanoparticles. The results indicated that surface properties of SnO2, such as surface defects and oxygen vacancies, etc, play important roles in the SERS. The higher is the content of surface defects and oxygen vacancies, the stronger is SERS signals.

Key words: Surface-enhanced Raman scattering(SERS), SnO2, Charge transfer, 4-Mercaptobenzoic acid

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