Fang Tianxing, Wei Qingyi, Wu Erwen, Pu Hongbin
School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China; Academy of Contemporary Food Engineering, South China University of Technology, Guangzhou Higher Education Mega Center, Guangzhou 510006, China.
School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China; Academy of Contemporary Food Engineering, South China University of Technology, Guangzhou Higher Education Mega Center, Guangzhou 510006, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2025 Jan 15;325:125047. doi: 10.1016/j.saa.2024.125047. Epub 2024 Aug 30.
Malachite green (MG)-contaminated aquatic products pose a serious threat to animal and human health. Hence, a novel recyclable surface-enhanced Raman scattering (SERS) substrate based on AuNPs/TiO/TiC heterostructures was developed for the detection and degradation of MG in aquatic products. Specifically, AuNPs/TiO/TiC heterostructures were synthesized by in situ oxidation and electrostatic adsorption based on TiC nanosheets. The excellent photocatalytic and SERS performance of the AuNPs/TiO/TiC was demonstrated by Density functional theory (DFT) calculations and experimental results, which was attributed to the enhancement of charge transfer (CT) after the formation of heterostructures. The results demonstrate that AuNPs/TiO/TiC is highly sensitive and recyclable. The detection limit of the sensor for MG is 8.91 × 10 mg/L. The sensor can be recycled for five times under the condition of light, and shows satisfactory self-cleaning performance in the food matrix, providing a possible alternative solution for the recyclable detection of MG.
孔雀石绿（MG）污染的水产品对动物和人类健康构成严重威胁。因此，开发了一种基于金纳米粒子/二氧化钛/碳化钛异质结构的新型可回收表面增强拉曼散射（SERS）基底，用于检测和降解水产品中的MG。具体而言，基于碳化钛纳米片通过原位氧化和静电吸附合成了金纳米粒子/二氧化钛/碳化钛异质结构。密度泛函理论（DFT）计算和实验结果证明了金纳米粒子/二氧化钛/碳化钛优异的光催化和SERS性能，这归因于异质结构形成后电荷转移（CT）的增强。结果表明，金纳米粒子/二氧化钛/碳化钛具有高灵敏度和可回收性。该传感器对MG的检测限为8.91×10毫克/升。该传感器在光照条件下可循环使用5次，在食品基质中表现出令人满意的自清洁性能，为MG的可回收检测提供了一种可能的替代解决方案。
