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Quantitative SERS-Based Detection and Elimination of Mixed Hazardous Additives in Food Mediated by the Intrinsic Raman Signal of TiO2 and Magnetic Enrichment
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-11-03 , DOI: 10.1021/acssuschemeng.0c07447 Yiran Tian 1 , Hongmei Liu 2 , Ying Chen 1 , Chenjie Gu 1 , Guodong Wei 3 , Tao Jiang 1
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-11-03 , DOI: 10.1021/acssuschemeng.0c07447 Yiran Tian 1 , Hongmei Liu 2 , Ying Chen 1 , Chenjie Gu 1 , Guodong Wei 3 , Tao Jiang 1
Affiliation
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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.
中文翻译：
基于定量SERS的TiO 2内在拉曼信号和磁富集介导的食品中混合有害添加剂的检测和消除
具有自校正和清洁功能的复杂的表面增强拉曼散射（SERS）活性纳米复合材料为定量检测和降解有害分子提供了新的视角。在这项工作中，开发了一种多功能的GO涂层Fe 3 O 4 @TiO 2 @AuAg SERS衬底。归因于磁芯，外部磁场感应出相对均匀的基质，而经过良好修饰的Au / Ag二元纳米颗粒与分子的电磁增强作用促进了基于SERS的灵敏食品中痕量混合添加剂的检测。 GO的丰富能力。特别是TiO 2在149 cm –1处的固有拉曼信号被充分利用作为内在标准，以提高此类检测的定量水平。此外，多功能的TiO 2层可在60分钟内有效地绿色消除这些目标分子。预期具有定量分析和光催化能力的新型SERS底物可能会扩展到在复杂系统中检测分析物的广泛应用。
更新日期：2020-11-16
中文翻译：
基于定量SERS的TiO 2内在拉曼信号和磁富集介导的食品中混合有害添加剂的检测和消除
具有自校正和清洁功能的复杂的表面增强拉曼散射（SERS）活性纳米复合材料为定量检测和降解有害分子提供了新的视角。在这项工作中，开发了一种多功能的GO涂层Fe 3 O 4 @TiO 2 @AuAg SERS衬底。归因于磁芯，外部磁场感应出相对均匀的基质，而经过良好修饰的Au / Ag二元纳米颗粒与分子的电磁增强作用促进了基于SERS的灵敏食品中痕量混合添加剂的检测。 GO的丰富能力。特别是TiO 2在149 cm –1处的固有拉曼信号被充分利用作为内在标准，以提高此类检测的定量水平。此外，多功能的TiO 2层可在60分钟内有效地绿色消除这些目标分子。预期具有定量分析和光催化能力的新型SERS底物可能会扩展到在复杂系统中检测分析物的广泛应用。
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