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Fabrication of a MoS2/g-C3N4@Au heterojunction-based recyclable SERS substrate for detecting fungicides

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Abstract

Aquaculture fungicide causes threats to the human community and their sensitive detection are thus essential for food safety. Herein, MoS2/g-C3N4@Au heterojunction-based recyclable SERS substrate was developed for fungicide detection. The optimal substrate exhibited good SERS performance with a detection limit as low as 9.908 × 10−5 mg L−1 for malachite green (MG). Furthermore, an MCN@Au-based photodegradation of crystal violet (CV) under simulated light irradiation was realized, resulting in a degradation rate of 95.6%. With the dual function of the as-synthesized materials, good reusability of the substrates for at least six “detection-degradation” cycles was achieved. In addition, the MG in prawn extract could be sensitively determined with a satisfactory recovery from 91.60 to 124.00%. This work paves an avenue for the fabrication of heterojunction-based recyclable SERS substrates and provides a novel weapon for food safety protection.

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Acknowledgements

The authors are grateful to the Guangdong Basic and Applied Basic Research Foundation (2022A1515012489) for its support. This research was also supported by the International S&T Cooperation Projects of Guangdong Province (2022A0505050003), National Natural Science Foundation of China (3217161084) and the Common Technical Innovation Team of Guangdong Province on Preservation and Logistics of Agricultural Products (2023KJ145).

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Authors and Affiliations

  1. School of Food Science and Engineering, South China University of Technology, Guangzhou, 510641, China

    Qingyi Wei, Qirong Dong, Hongbin Pu & Da-Wen Sun

  2. Academy of Contemporary Food Engineering, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, China

    Qingyi Wei, Qirong Dong, Hongbin Pu & Da-Wen Sun

  3. Engineering and Technological Research Centre of Guangdong Province on Intelligent Sensing and Process Control of Cold Chain Foods, & Guangdong Province Engineering Laboratory for Intelligent Cold Chain Logistics Equipment for Agricultural Products, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, China

    Qingyi Wei, Qirong Dong, Hongbin Pu & Da-Wen Sun

  4. Food Refrigeration and Computerized Food Technology (FRCFT), Agriculture and Food Science Centre, University College Dublin, National University of Ireland, Belfield, Dublin 4, Ireland

    Da-Wen Sun

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Wei, Q., Dong, Q., Pu, H. et al. Fabrication of a MoS2/g-C3N4@Au heterojunction-based recyclable SERS substrate for detecting fungicides. Food Measure 18, 1175–1189 (2024). https://doi.org/10.1007/s11694-023-02200-3

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