Journal
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
Volume 8, Issue 45, Pages 16990-16999Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.0c07447
Keywords
Fe3O4@TiO2@AuAg-GO; Internal standard; Quantitative detection; Mixed additives; Recyclability
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Funding
- National Natural Science Foundation of China [11875032]
- Natural Science Foundation of Zhejiang Province [LY19F050002]
- Natural Science Foundation of Ningbo [2018A610316]
- Fundamental Research Funds for the Provincial Universities of Zhejiang [SJLY2020012]
- K.C. Wong Magna Fund at Ningbo University
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Sophisticated surface-enhanced Raman scattering (SERS)-active nanocomposites with both self-correction and cleaning capabilities provide new perspectives for the quantitative detection and degradation of hazardous molecules. In this work, a multifunctional GO-coated Fe3O4@TiO2@AuAg SERS substrate was developed. Attributed to the magnetic core, a relatively uniform substrate was induced by an external magnetic field and a sensitive SERS-based detection of trace mixed additives in foods was facilitated by electromagnetic enhancement from the well-modified Au/Ag binary nanoparticles in conjunction with the molecular enrichment ability of the GO. Particularly, the intrinsic Raman signal at 149 cm(-1) of TiO2 was fully exploited to act as an intrinsic internal standard for the improvement of the quantitative level of such detection. Additionally, the efficient green elimination of these target molecules within 60 min was enabled by the multifunctional TiO2 layer. It is expected that this novel SERS substrate with both quantitative analytical and photocatalytic capability may extend to a broad application for detecting analytes in complex systems.
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