Preparation of MOF/Au composite nanoparticles and their SERS properties

Huihui Liu, Baichuan Zhao, Congyun Zhang

Article ID: 1412
Vol 5, Issue 1, 2022, Article identifier:30-38

VIEWS - 64 (Abstract) 33 (PDF)

Abstract


Surface-enhanced Raman scattering (SERS) spectrum has the characteristics of fast-detection, high-sensitivity and low-requirements for sample pretreatment. It plays a more and more important role in the detection of organic pollutants. In this study, MIL-101 and Au nanoparticles were prepared by hydrothermal method and aqueous solution reduction method respectively, and MIL-101/Au composite nanoparticles were prepared by electrostatic interaction. The SERS properties of the composite substrate were optimized by adjusting the size of Au nanoparticles and the surface distribution density of MIL-101 nanoparticles. The detection limit of Rhodamine 6G (R6G) for the composite substrate with the optimal ratio was investigated, which was as low as 10–11 M. It is proved that MIL-101/Au composite nanoparticles have high sensitivity to probe molecules. When they are applied to the detection of persistent organic pollutants, the detection limit for fluoranthene can reach 10–9 M and for 3,3’,4,4’-tetrachlorobiphenyl (PCB-77) can reach 10–5 M.


Keywords


MIL-101; Au Nanoparticles; Surface-Enhanced Raman Scattering (SERS)

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DOI: http://dx.doi.org/10.24294/can.v5i1.1412

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