Chem. J. Chinese Universities ›› 2012, Vol. 33 ›› Issue (01): 139.doi: 10.3969/j.issn.0251-0790.2012.01.023

• Physical Chemistry • Previous Articles     Next Articles

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

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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