高等学校化学学报 ›› 2019, Vol. 40 ›› Issue (4): 624.doi: 10.7503/cjcu20190025
张建会1, 周晋雅1, 林海波1,2, 李湛2, 方千荣1,2, 薛铭1,2(), 裘式纶1,2
收稿日期:
2019-01-14
出版日期:
2019-04-03
发布日期:
2019-04-10
作者简介:
联系人简介: 薛 铭, 男, 博士, 教授, 博士生导师, 主要从事无机固体材料化学方面的研究. E-mail:
基金资助:
ZHANG Jianhui1, ZHOU Jinya1, LIN Haibo1,2, LI Zhan2, FANG Qianrong1,2, XUE Ming1,2,*(), QIU Shilun1,2
Received:
2019-01-14
Online:
2019-04-03
Published:
2019-04-10
Contact:
XUE Ming
E-mail:xueming@jlu.edu.cn
Supported by:
摘要:
基于二维材料MXene(Ti3C2Tx)的化学组成和纳米片状结构, 在不锈钢网上制备了具有MXene微纳结构表面的新型亲水和水下超疏油分离膜. 对于不同类型的油-水混合物, 该膜材料可实现重力驱动的高效油水分离, 收集的水中残油量小于4 mg/L, 具有高分离效率(>99.99%), 水通量高达57.52 L·m-2·s-1. 此外, 经高温处理和多种有机溶剂浸泡后MXene膜仍具有高效的油水分离性能, 并表现出优异的稳定性和循环性.
TrendMD:
张建会, 周晋雅, 林海波, 李湛, 方千荣, 薛铭, 裘式纶. 具有水下超疏油性能的MXene高效油水分离膜. 高等学校化学学报, 2019, 40(4): 624.
ZHANG Jianhui,ZHOU Jinya,LIN Haibo,LI Zhan,FANG Qianrong,XUE Ming,QIU Shilun. MXene-Coated Mesh Membrane with Underwater Superoleophobicity for High-efficiency Oil-water Separation†. Chem. J. Chinese Universities, 2019, 40(4): 624.
Fig.1 XRD patterns of MXene(a) and MXene nanosheets(b)(A), TEM image of MXene nanosheets(B) and FTIR spectra of MXene nanosheets(a) and MXene-coated mesh membrane(b)(C)The inset of image (B) is the Tyndall scattering effect in MXene colloidal solution in water.
Fig.2 SEM images of MXene-coated mesh membrane prepared on stainless steel mesh(500 mesh/28 μm)(A—D) The MXene-coated mesh membrane with different magnifications. The inset of image (A) shows the smooth surface of a neat mesh. (D) A single MXene-coated wire.
Fig.5 Photographs of a water droplet(A) and an underwater oil droplet(B)(dichloroethane) on a neat mesh; a water droplet(C) and an underwater oil droplet (D)(dichloroethane) on the MXene-coated mesh membraneThe inset of image (D) is sliding angle.
Fig.6 Photographs of the oil-water separation process using a neat mesh(A) and a MXene-coated mesh membrane(B) Cyclohexane was dyed with Sudan Ⅲ for clear observation.
Fig.7 Oil-water separation performances of the MXene-coated mesh membrane(A) Residual oil content in the collected water and separation efficiency for a series of oil-water mixtures. a. Cyclohexane; b. pump oil; c. soybean oil; d. diesel; (B) the influence of different mesh number on water flux and intrusion pressure of oil(calculated by cyclohexane); (C, D) Separation efficiency and intrusion pressures of MXene-coated mesh membrane after immersing in various organic solvents for 7 d. a. Hex; b. DMSO; c. DCM; d. CCl4; e. DMF; f. TEA.
Fig.8 Separation efficiency for oil-water mixture of MXene-coated mesh membrane during ten cycles(A), separation efficiency for oil-water mixture of MXene-coated mesh membrane after heating treatment under different temperatures overnight(B) and photograph of oil column(cyclohexane) above a MXene-coated mesh membrane after heating treatment under 200 ℃ overnight(C)
Fig.9 SEM images of MXene-coated mesh membrane after using for 10 cycles(A, B), contact angle images of a water droplet(C) and an underwater oil droplet(D)(dichloroethane) on the MXene-coated mesh membrane after using for 10 cyclesThe inset of (B) is a photograph of oil droplets(dichloromethane) on MXene-coated mesh membrane in water after using for 10 cycles.
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