Fujian Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Fujian Normal University, Fuzhou 350007, Fujian Province, China.
Fujian Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Fujian Normal University, Fuzhou 350007, Fujian Province, China.
J Colloid Interface Sci. 2022 Feb 15;608(Pt 3):3159-3167. doi: 10.1016/j.jcis.2021.11.049. Epub 2021 Nov 13.
The presence of residual antibiotics will lead to potential environmental risks. Here cyclodextrins (CDs) were successfully used to modify graphene-based iron nanoparticles (GO@Fe NPs) to enhance the absorption of oxytetracycline hydrochloride (OTC). The removal of OTC decreased in the order: γCD-GO@Fe NPs > βCD-GO@Fe NPs > αCD-GO@Fe NPs > GO@Fe NPs, with better performance than that of bare GO and Fe NPs. Characterization techniques were applied to better understand how CDs impact the structure of GO@Fe NPs and improve removal performance. Raman and X-ray diffraction analysis showed that GO acted as a carrier to support Fe NPs within the grafted cyclodextrin, where GO also participated in the removal process. Cyclodextrin modified GO@Fe NPs had relatively small particle sizes (15 nm), with a high surface area (61.7 m · g). X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy suggested that cyclodextrin acted as both a stabilizing and capping agent during green synthesis, which could protect the reactivity of Fe NPs and simultaneously reduce aggregation. A potential synthesis mechanism of cyclodextrins modified composites was also proposed, and subsequent wastewater testing indicated that γCD-GO@Fe NPs had high potential for practical applications.
残留抗生素的存在会导致潜在的环境风险。在这里，环糊精（CDs）被成功地用于修饰基于石墨烯的铁纳米粒子（GO@Fe NPs），以增强盐酸土霉素（OTC）的吸附。OTC 的去除顺序为：γCD-GO@Fe NPs > βCD-GO@Fe NPs > αCD-GO@Fe NPs > GO@Fe NPs，其性能优于裸 GO 和 Fe NPs。采用了表征技术来更好地理解 CDs 如何影响 GO@Fe NPs 的结构并提高去除性能。拉曼和 X 射线衍射分析表明，GO 作为载体在接枝的环糊精内支撑 Fe NPs，其中 GO 也参与了去除过程。环糊精修饰的 GO@Fe NPs 的粒径相对较小（15nm），比表面积较大（61.7m²·g）。X 射线光电子能谱和傅里叶变换红外光谱表明，环糊精在绿色合成过程中既起到稳定作用，又起到封端作用，可保护 Fe NPs 的反应活性，同时减少聚集。还提出了环糊精修饰复合材料的潜在合成机制，随后的废水测试表明 γCD-GO@Fe NPs 具有很高的实际应用潜力。
