Chen Guotong, Mi Fang, Zhang Shan, Rao Xuehui, Sun Jian, Yang Zhong, Guan Ming
College of Chemistry and Chemical Engineering, Xinjiang Normal University, Urumqi, 830017, China; Xinjiang Uygur Autonomous Region Science and Technology Resources Sharing Service Centre, Urumqi 830011, China; Xinjiang Industry Technical College, Urumqi 830021, China.
College of Chemistry and Chemical Engineering, Xinjiang Normal University, Urumqi, 830017, China.
Food Chem. 2025 Nov 30;493(Pt 1):145723. doi: 10.1016/j.foodchem.2025.145723. Epub 2025 Jul 26.
This study reports the design and fabrication of a magnetic nanoporous carbon-based recyclable surface-enhanced Raman scattering (SERS) substrate Co/C@Ag/g-CN, which can simultaneously achieve SERS detection and visible-light photocatalytic degradation of malachite green (MG). Co/C and g-CN can spontaneously adsorb and concentrate MG near plasmonic nanoparticles, thereby enhancing the SERS response. The substrate exhibited a SERS enhancement factor of approximately 1.3 × 10. The limit of detection (LOD) for MG in aquaculture water, prawn, and tilapia was 8.2 × 10 M, 0.08 μg/kg, and 0.06 μg/kg, respectively. The substrate can be magnetically collected from the complex matrix and regenerated through photocatalytic degradation. Eliminates the co-centrifugation of the SERS substrate with the complex matrix. Even after 4 regeneration cycles, the substrate retained nearly 80 % of its original SERS intensity. This study presents a novel strategy for constructing self-enriched, self-cleaning, and recyclable substrates with promising applications in food safety and environmental protection.
本研究报道了一种磁性纳米多孔碳基可回收表面增强拉曼散射（SERS）基底Co/C@Ag/g-CN的设计与制备，该基底能够同时实现SERS检测以及孔雀石绿（MG）的可见光光催化降解。Co/C和g-CN能够自发地在等离子体纳米颗粒附近吸附并富集MG，从而增强SERS响应。该基底的SERS增强因子约为1.3×10。养殖水、对虾和罗非鱼中MG的检测限分别为8.2×10 M、0.08 μg/kg和0.06 μg/kg。该基底可从复杂基质中通过磁性收集，并通过光催化降解进行再生。避免了SERS基底与复杂基质的共同离心。即使经过4次再生循环，该基底仍保留了近80%的原始SERS强度。本研究提出了一种构建自富集、自清洁和可回收基底的新策略，在食品安全和环境保护方面具有广阔的应用前景。
