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Fabrication of the MIL-101(Fe)@Ag composite SERS substrate for the detection of formaldehyde

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Surface-enhanced Raman scattering (SERS) has been widely applied in various fields due to its high sensitivity and rapid response capability. In this paper, a MIL-101(Fe)@Ag composite SERS substrate was prepared using photoreduction method. The synthesized MIL-101(Fe)@Ag composite substrate combines the localized surface plasmon resonance properties of silver nanoparticles and the high adsorption capacity of metal–organic frameworks. MIL-101 (Fe)@Ag composite substrate was characterized by FTIR, UV and SEM. The SERS activity of the composite substrates was characterized by measuring the Raman signals of PATP. The detection limit of the substrate for PATP was 10–8 M, with a relative standard deviation of only about 5.3%, indicating good SERS effect and reproducibility of the substrate. Finally, the prepared substrate was applied for formaldehyde detection, with a detection limit of 10–9 M. Principal component analysis was used for quantitative analysis of formaldehyde. This work proposes a simple method for synthesizing MIL-101(Fe)@Ag composite substrates with high SERS performance and uniformity and establishes a rapid detection method for formaldehyde using this substrate, which has great application prospects.

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Acknowledgements

This work was supported by Scientific research project of Mudanjiang Normal University (Grant No. YB2022007).

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Correspondence to Yufeng Chen.

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Chen, Y., Zhao, N. Fabrication of the MIL-101(Fe)@Ag composite SERS substrate for the detection of formaldehyde. Chem. Pap. 78, 3761–3772 (2024). https://doi.org/10.1007/s11696-024-03346-0

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  • DOI: https://doi.org/10.1007/s11696-024-03346-0

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