Ni(Ⅱ)掺杂分层多孔Cu-BTC高效去除水体中的四环素

Hierarchical Porous Cu-BTC Doped with Ni(Ⅱ) for Efficient Removal of Tetracycline from Water

制备了Ni(Ⅱ)掺杂的分级多孔金属有机骨架材料(HP-Ni-Cu-BTC,H_(3)BTC=均苯三甲酸),并将其作为吸附剂去除四环素(TC)。研究表明,Ni的掺杂和分级多孔结构显著提高了TC的吸附容量,是微孔Cu-BTC的3.28倍。吸附动力学和吸附等温线结果证明,化学吸附在吸附反应中占主导地位,TC在HP-Ni-Cu-BTC上的吸附是通过在非均质吸附剂表面的多层吸附进行的。此外,在循环实验中,重复使用4次后,HP-Ni-Cu-BTC仍然还有71.45%的吸附效率,说明其有良好的可重复使用性。

In this study,a Ni(Ⅱ)-doped hierarchical porous metal-organic framework(HP-Ni-Cu-BTC,H_(3)BTC=benzene-1,3,5-tricarboxylic acid) hierarchical porous metal-organic framework was successfully prepared,and applied as an adsorbent for the removal of tetracycline(TC).The Ni(Ⅱ) doping and hierarchical porosity structure significantly increased the adsorption capacity of TC,which was 3.28 times that of microporous Cu-BTC.The adsorption kinetics and adsorption isotherm studies demonstrated that chemisorption dominated the adsorption reaction and that the adsorption of TC on HP-Ni-Cu-BTC proceeds through multilayer adsorption on a non-homogeneous adsorbent surface.Moreover,in the cycling experiments,there was still 71.45% adsorption efficiency after four times of reuse,indicating that HP-Ni-Cu-BTC had good reusability.