Journal
SEPARATION AND PURIFICATION TECHNOLOGY
Volume 272, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.seppur.2021.118871
Keywords
Metal-organic frameworks; Electrodeposition; Wettability; Oil; water separation; Dyes adsorption
Categories
Funding
- National Natural Science Foundation of China [21776094]
- Natural Science Foundation Project of Chongqing [cstc2019jcyj-msxmX0309]
- Fundamental Research Funds for the Central Universities [2020CDJQY-A033]
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Homogeneous hydrophobic ZIF-67 decorated copper mesh was prepared using ultrafast electrodeposition and subsequent hydrophobization, showing high separation efficiency of over 98% and almost no decline after several cycles.
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.
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