Water pollutant such as dyes had danger the water quality. Todays, porous materials are great potential for dye adsorption from water bodies. In this study, the iron-based metal–organic framework (MOF-Fe) of MIL-101 is synthesized through a facile solvothermal method. The amine-functionalization effect of the MOF-Fe (amine-MOF-Fe) is evaluated for the adsorptive removal of methylene blue (MB) from aqueous solution. The adsorption behaviour had shown a rapid MB adsorption within the first hour of the process due to the pore-filling mechanism of the porous MOF-Fe structure. The electrostatic interaction between the amino group of amine-MOF-Fe and MB had contributed to the high adsorption capacity. The amine-functionalization effect also found the amine-MOF-Fe is having two times higher adsorption capacity when used with the loading two times lower than non-functionalized MOF-Fe. The maximum equilibrium adsorption capacities were measured at 149.25 and 312.5 mg/g with optimum MOFs loading of 0.8 and 0.4 g/L for MOF-Fe and amine-MOF-Fe, respectively. The adsorption mechanism proposed includes the electrostatic interaction, pore filling, hydrogen bonding, and π–π stacking. The regeneration study showed the MOFs could be recycled without interfering with the removal efficiency. Hence, the results indicate that the MOFs had desirable reusability for the practical adsorption of cationic dyes with its features of fast adsorption and high capacity.

染料等水污染物危害水质。如今，多孔材料具有从水体吸附染料的巨大潜力。在这项研究中，MIL-101的铁基金属-有机骨架（MOF-Fe）是通过简便的溶剂热法合成的。评估了MOF-Fe（胺-MOF-Fe）的胺官能化作用，以从水溶液中吸附去除亚甲基蓝（MB）。由于多孔MOF-Fe结构的孔填充机理，在吸附过程的第一个小时内，吸附行为就显示出快速的MB吸附。胺-MOF-Fe的氨基与MB之间的静电相互作用促进了高吸附容量。胺官能化效果还发现，当负载量比未官能化的MOF-Fe低两倍时，胺-MOF-Fe的吸附容量高出两倍。测得的最大平衡吸附容量为149.25和312.5 mg / g，对于MOF-Fe和胺-MOF-Fe的最佳MOF负载分别为0.8和0.4 g / L。提出的吸附机制包括静电相互作用，孔填充，氢键和π–π堆积。再生研究表明，MOF可以回收利用而不会影响去除效率。因此，结果表明，MOF具有快速吸附和高容量的特征，对于阳离子染料的实际吸附具有理想的可重复使用性。MOF-Fe和胺-MOF-Fe的最佳MOF加载量分别为25和312.5 mg / g和0.8 g / L。提出的吸附机制包括静电相互作用，孔填充，氢键和π–π堆积。再生研究表明，MOF可以回收利用而不会影响去除效率。因此，结果表明，MOF具有快速吸附和高容量的特征，对于阳离子染料的实际吸附具有理想的可重复使用性。MOF-Fe和胺-MOF-Fe的最佳MOF加载量分别为25和312.5 mg / g和0.8 g / L。提出的吸附机制包括静电相互作用，孔填充，氢键和π–π堆积。再生研究表明，MOF可以回收利用而不会影响去除效率。因此，结果表明，MOF具有快速吸附和高容量的特征，对于阳离子染料的实际吸附具有理想的可重复使用性。