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SERS study of Co-doped TiO2 nanoparticles

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Abstract

Single-phase Co-doped TiO2(Co x Ti1−x O2) nanoparticles(NPs) synthesized via a simple sol-hydrothermal method were used as surface-enhanced Raman scattering(SERS) substrates. Interestingly, it was found that SERS signals were enhanced greatly compared to those of pure TiO2 nanoparticles when an amount of Co2+ ions were doped into the TiO2 lattice. Detailed results clearly show that Co element as Co2+ was incorporated into the TiO2 lattice and the defects were created due to the substitution of Co2+ ions for the Ti4+ ions. The Co2+ doping increases the defect concentration of Co x Ti1−x O2 NPs. An amount of defects is beneficial to the charge-transfer so as to increase the SERS activities. A possible mechanism of charge-transfer from Co x Ti1−x O2 NPs to molecules was then briefly discussed.

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Authors and Affiliations

  1. State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun, 130012, P. R. China

    Xiang-xin Xue, Wei Ji, Zhu Mao, Zhi-shi Li, Zhi-nan Guo & Bing Zhao

  2. Joint State Key Laboratory on Integrated Optoelectronics, Jilin University, Changchun, 130012, P. R. China

    Xiang-xin Xue & Chun Zhao

Authors
  1. Xiang-xin Xue
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  2. Wei Ji
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  3. Zhu Mao
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  4. Zhi-shi Li
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  5. Zhi-nan Guo
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  6. Bing Zhao
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  7. Chun Zhao
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Corresponding author

Correspondence to Bing Zhao.

Additional information

Supported by the National Natural Science Foundation of China(Nos.21273091, 21221063), the Specialized Research Fund for the Doctoral Program of Higher Education, China(No.20110061110017), the Program of Introducing Talents of Discipline to Chinese Universities(No.B06009), the Postdoctoral Science Foundation, China(No.2013M530974) and the Development Program of the Science and Technology of Jilin Province, China(No.20110338).

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Xue, Xx., Ji, W., Mao, Z. et al. SERS study of Co-doped TiO2 nanoparticles. Chem. Res. Chin. Univ. 29, 751–754 (2013). https://doi.org/10.1007/s40242-013-3051-5

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  • DOI: https://doi.org/10.1007/s40242-013-3051-5

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