Fabrication and Separation Performance of Two-Dimensional MXene Nanochannel Membranes |
Authors: Wang Bo, Sun Kuo, Zhang Gang, Sun Chunyi, Wang Xueling, Dong Yingchao |
Units: 1Key Laboratory of Industrial Ecology and Environmental Engineering, School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China) (2School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, China |
KeyWords: Water treatment; Two-dimensional (2D) material membranes; MXene nanochannel membrane; Anti-swelling; Desalination; Emerging contaminant |
ClassificationCode:TQ028.8 |
year,volume(issue):pagination: 2023,43(5):20-27 |
Abstract: |
Water scarcity is one of the key challenges that limit social and industrial development. Separation membranes constructed with two-dimensional (2D) materials show promising potential in water treatment applications due to their excellent separation performance and tunable microstructure. However, there are some issues of high-quality fabrication and swelling for current 2D materials membranes. To address these issues, in this study, a modified carbon nanotubes (CNTs) interlayer (0.34 μm) was introduced onto porous alumina (Al2O3) ceramic substrates via vacuum filtration to provide more binding sites and stronger binding forces for high-quality top-layer formation. Then MXene (Ti3C2Tx) membranes were fabricated on them via vacuum filtration, followed by a thermal cross-linking strategy at 180 ℃. Anti-swelling ability was improved, though both channel size and permeability were reduced during thermal cross-linking process. The MX-180 membrane exhibits a nanochannel size of 5.0 Å, pure water permeance of 8.3 L·m-2·h-1·MPa-1 under the nanofiltration test at 0.1-0.5 MPa pressure, and the rejections of 67.87%, 79.99%, 85.66%, 91.34% for KCl, NaCl, MgCl2, tetracycline indicating promising separation performance and anti-swelling stability. |
Funds: |
国家重点研发专项(No. 2019YFA0705803)、兴辽英才项目(No. XLYC1807250)、国家自然科学基金(No. 21876020和No. 52070033)和企业横向课题(No.HX20190810) |
AuthorIntro: |
汪波(1998-),男,安徽六安人,硕士研究生,研究方向为二维纳米通道的构筑及离子分离研究,E-mail:wang6719@foxmail.com |
Reference: |
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