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Ultrafast preparation of hydrophobic ZIF-67/copper mesh via electrodeposition and hydrophobization for oil/water separation and dyes adsorption
Separation and Purification Technology ( IF 8.6 ) Pub Date : 2021-05-04 , DOI: 10.1016/j.seppur.2021.118871
Peizhang Zhou , Jiang Cheng , Yuanyang Yan , Shouping Xu , Cailong Zhou

Homogeneous hydrophobic ZIF-67 decorated copper mesh was prepared by ultrafast electrodeposition and subsequent hydrophobization with stearic acid or 1-dodecanethiol. The preparation can be completed within 9 min under room temperature. Based on the hard-soft-acid-base (HSAB) theory, there exists difference of the interaction between Co2+ and specific groups (carboxy or sulfhydryl), the oil/water separation and dyes adsorption performances were thus affected after ZIF-67-coated copper mesh was hydrophobized. The separation efficiency of the hydrophobic meshes for various oil/water mixtures was all greater than 98%, and remained almost no decline after several cycles of separation. However, the intrusion pressure of ZIF-67/copper mesh modified by 1-dodecanethiol is higher than the one modified by stearic acid. At the same time, the 1-dodecanethiol modified ZIF-67/copper mesh displayed a high adsorption capacity for Congo red (near 2000 mg/m2), while the adsorption rate of the mesh modified by stearic acid is significantly faster. This work proposed a simple and fast method to build continuous, homogeneous MOFs film for oil/water separation and dyes adsorption.



中文翻译:

通过电沉积和疏水化超快制备疏水性ZIF-67 /铜网,用于油/水分离和染料吸附

均质的疏水性ZIF-67装饰铜网是通过超快电沉积和随后的硬脂酸或1-十二烷硫醇疏水化制备的。制备可在室温下9分钟内完成。基于硬-软酸-碱(HSAB)理论,Co 2+之间的相互作用存在差异ZIF-67包覆的铜网疏水化后,特定的基团(羧基或巯基),油/水分离和染料吸附性能受到影响。疏水性网孔对各种油/水混合物的分离效率均大于98%,经过数次分离后几乎保持不变。然而,用十二烷硫醇改性的ZIF-67 /铜网的侵入压力高于用硬脂酸改性的ZIF-67 /铜网。同时,经1-十二烷硫醇修饰的ZIF-67 /铜网对刚果红具有很高的吸附能力(接近2000 mg / m 2)。),而硬脂酸修饰的网片的吸附速率明显更快。这项工作提出了一种简单快速的方法来构建连续,均匀的MOF膜,以进行油/水分离和染料吸附。

更新日期:2021-05-08
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