College of Chemical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 211816, PR China.
College of Chemical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 211816, PR China.
J Hazard Mater. 2022 Mar 15;426:128112. doi: 10.1016/j.jhazmat.2021.128112. Epub 2021 Dec 20.
Chromium based metal-organic framework (MIL-53(Cr)) has enormous potential in the removal of organic contaminants from aqueous solutions due to its outstanding water stability, whereas its poor adsorption capacity limits the application. In this study, La/LaF-MIL-53(Cr) was successfully synthesized by taking the advantages of La doping and LaF encapsulation with one-step hydrothermal method. Diverse analysis tools were utilized to verify that La not only existed in the framework, but also was loaded in the pores in the form of LaF. The adsorption experiment results demonstrated that 0.3-La/LaF-MIL-53(Cr) exhibited significantly improved adsorption capacity by four times compared with the pristine MIL-53(Cr) material. XPS and FTIR revealed that the affinity of La to tetracycline was significantly stronger than that of Cr and the excellent dispersion of LaF in the material may also be the cause of the increase in adsorption capacity. This study described a simple method to combine two different forms of modification and the modified material was potential for tetracycline adsorption.
基于铬的金属有机骨架（MIL-53(Cr)）由于其出色的水稳定性，在去除水溶液中的有机污染物方面具有巨大的潜力，但其吸附能力差限制了其应用。本研究采用 La 掺杂和 LaF 封装的优势，通过一步水热法成功合成了 La/LaF-MIL-53(Cr)。多种分析工具验证了 La 不仅存在于骨架中，而且以 LaF 的形式负载在孔中。吸附实验结果表明，与原始 MIL-53(Cr)材料相比，0.3-La/LaF-MIL-53(Cr)的吸附容量显著提高了四倍。XPS 和 FTIR 表明，La 与四环素的亲和力明显强于 Cr，并且 LaF 在材料中的优异分散性也可能是吸附容量增加的原因。本研究描述了一种将两种不同形式的修饰相结合的简单方法，改性材料具有吸附四环素的潜力。
