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Bi-functional Au/FeS (Au/Co3O4) composite for in situ SERS monitoring and degradation of organic pollutants

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Abstract

The bi-functional Au/FeS (Au/Co3O4) composite was fabricated by in situ reducing Au nanoparticles onto the surface of FeS (Co3O4). The as-prepared FeS possessed a multi-structure composed of plenty of nanoplates, which were coated by Au nanoparticles with an average size of ~47.5 nm. While the Co3O4 showed a thin hexagonal sheet containing Au nanoparticles on its surface with an average size of ~79.0 nm. Both the as-prepared Au/FeS and Au/Co3O4 composites exhibited excellent SERS performance, capable of enhancing the Raman signals of R6G molecules with the enhancement factor up to 1.81 × 106 and 7.60 × 104, respectively. Moreover, Au/FeS (Au/Co3O4) composite also has been verified to have intrinsic peroxidase-like activity, which could decompose H2O2 into hydroxyl radicals and then degrade organic pollutants into small molecules. Therefore, SERS can be used to real-time and in situ monitoring the degradation process of R6G molecules, employing the Au/FeS (Au/Co3O4) composite both as SERS substrate and catalyst.

Graphical abstract

SERS was used to real-time and in situ monitoring the degradation of R6G, employing the Au/FeS and Au/Co3O4 composites both as SERS substrates and catalysts.

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Acknowledgments

The project was supported by the National Basic Research Program of China (973 Program) (Grant No. 2012CB932903), Major Research Plan of National Natural Science Foundation of China (No. 91433111), Qing Lan Project, Collaborative Innovation Center of Suzhou Nano Science and Technology, Innovative Research Teams of Jiangsu Higher Education Institutions and the Priority Academic Program Development of Jiangsu Higher Education.

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Authors and Affiliations

  1. Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215123, People’s Republic of China

    Shuzhen Ma, Qian Cai, Kailing Lu, Fan Liao & Mingwang Shao

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  1. Shuzhen Ma
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  2. Qian Cai
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  3. Kailing Lu
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  4. Fan Liao
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  5. Mingwang Shao
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Correspondence to Fan Liao or Mingwang Shao.

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Ma, S., Cai, Q., Lu, K. et al. Bi-functional Au/FeS (Au/Co3O4) composite for in situ SERS monitoring and degradation of organic pollutants. J Nanopart Res 18, 26 (2016). https://doi.org/10.1007/s11051-016-3335-z

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