School of Food and Biological Engineering, Chengdu University, Chengdu, 610106, China; Key Laboratory of Medicinal and Edible Plants Resources Development of Sichuan Education Department, Sichuan Industrial Institute of Antibiotics, College of Pharmacy, Chengdu University, Chengdu, 610106, China.
Key Laboratory of Medicinal and Edible Plants Resources Development of Sichuan Education Department, Sichuan Industrial Institute of Antibiotics, College of Pharmacy, Chengdu University, Chengdu, 610106, China.
Chemosphere. 2023 Aug;331:138842. doi: 10.1016/j.chemosphere.2023.138842. Epub 2023 May 2.
In this work, a kind of multifunctional magnetic plasmonic photocatalyst was prepared by a green and efficient process. Magnetic mesoporous anatase titanium dioxide (FeO@mTiO) was synthesized by microwave-assisted hydrothermal, and Ag NPs were simultaneously in-situ grown on FeO@mTiO (FeO@mTiO@Ag), graphene oxide (GO) was then wrapped on FeO@mTiO@Ag (FeO@mTiO@Ag@GO) to increase its adsorption capacity for fluoroquinolone antibiotics (FQs). Owing to the localized surface plasmon resonance (LSPR) effect of Ag, as well as the photocatalytic capacity of TiO, a multifunctional platform based on FeO@mTiO@Ag@GO was constructed for adsorption, surface-enhanced Raman spectroscopy (SERS) monitoring and photodegradation of FQs in water. The quantitative SERS detection of norfloxacin (NOR), ciprofloxacin (CIP), and enrofloxacin (ENR) was demonstrated with LOD of 0.1 μg mL, and the qualitative analysis was confirmed by density functional theory (DFT) calculation. The photocatalytic degradation rate of NOR over FeO@mTiO@Ag@GO was about 4.6 and 1.4 times faster than that of FeO@mTiO and FeO@mTiO@Ag, indicating the synergetic effects of Ag NPs and GO, the used FeO@mTiO@Ag@GO can be easily recovered and recycled for at least 5 times. Thus, the eco-friendly magnetic plasmonic photocatalyst provided a potential solution for the removal and monitoring of residual FQs in environmental water.
在这项工作中，通过一种绿色高效的方法制备了一种多功能磁性等离子体光催化剂。通过微波辅助水热法合成了磁性介孔锐钛矿二氧化钛（FeO@mTiO），并同时在 FeO@mTiO 上原位生长了 Ag NPs（FeO@mTiO@Ag），然后将氧化石墨烯（GO）包裹在 FeO@mTiO@Ag 上（FeO@mTiO@Ag@GO），以增加其对氟喹诺酮类抗生素（FQs）的吸附能力。由于 Ag 的局域表面等离子体共振（LSPR）效应以及 TiO 的光催化能力，构建了基于 FeO@mTiO@Ag@GO 的多功能平台，用于水中 FQs 的吸附、表面增强拉曼光谱（SERS）监测和光降解。通过检测，NOR、CIP 和 ENR 的定量 SERS 检测的 LOD 分别为 0.1μg/mL，通过密度泛函理论（DFT）计算证实了定性分析。FeO@mTiO@Ag@GO 对 NOR 的光催化降解速率比 FeO@mTiO 和 FeO@mTiO@Ag 分别快约 4.6 倍和 1.4 倍，表明 Ag NPs 和 GO 的协同作用，所使用的 FeO@mTiO@Ag@GO 可以很容易地回收和再循环至少 5 次。因此，这种环保型磁性等离子体光催化剂为去除和监测环境水中残留的 FQs 提供了一种潜在的解决方案。
