氨基功能化Fe-MOF的合成及其在双酚去除中的应用

Synthesis of amino functionalized MOFs and their application in the removal of bisphenol

以2-氨基对苯二甲酸(NH_(2)-BDC)和九水合硝酸铁(Fe(NO_(3))_(3)·9H_(2)O)为原料合成了氨基功能化的铁基金属有机框架(NH_(2)-MIL-88B(Fe))材料。该NH_(2)-MIL-88B(Fe)材料中的氨基官能团可以和双酚类化合物(BPs)中的羟基形成氢键相互作用力,为有效去除环境中有害BPs提供基础。结果表明,制备的NH_(2)-MIL-88B(Fe)具有纺锤型形貌,对双酚A、双酚B、双酚F、双酚AF的吸附量分别为273.22、274.73、226.76、408.16 mg·g^(-1)。NH_(2)-MIL-88B(Fe)对BPs高的吸附量表明其可以有效去除环境中有害BPs。利用拟一级动力学模型和拟二级动力学模型考察了吸附动力学,结果表明拟二级动力学模型可以更好地描述NH_(2)-MIL-88B(Fe)对BPs的吸附过程。

This article synthesized the iron-based metal organic framework material with amino groups by using 2-aminoterephthalic acid(NH_(2)-BDC)and ferric nitrate nonahydrate(Fe(NO_(3))_(3)·9H_(2)O)as monomers.The amino groups in NH2-MIL-88B(Fe)could form hydrogen bonding interaction with the hydroxyl group in the bisphenos(BPs),providing a basis for effectively removing harmful BPs from the environment.The results showed that the prepared NH_(2)-MIL-88B(Fe)possessed a spindle shaped structure,and its adsorption capacities for bisphenol A,bisphenol B,bisphenol F,bisphenol AF were 273.22,274.73,226.76,408.16 mg·g^(-1),respectively.The high adsorption capacity of NH_(2)-MIL-88B(Fe)for BPs indicated that it could effectively remove harmful BPs from the environment.The adsorption kinetics were investigated using quasi-first order and quasi-second order kinetic models,and the results showed that the quasi-second order kinetic model could better describe the adsorption process of NH_(2)-MIL-88B(Fe)for BPs.