期刊
ENVIRONMENTAL SCIENCE & TECHNOLOGY
卷 54, 期 14, 页码 9074-9082出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.est.0c01084
关键词
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资金
- National Natural Science Foundation of China [21876020]
- Youth Top-Notch Talent Program of Talent Project of Revitalizing Liaoning [XLYC1807250]
- National Key Research and Development Project [2019YFA0705803]
- Key Project of Liaoning Natural Science Foundation [20180510005]
- 111 Program of Introducing Talents of Discipline to Universities [B13012]
- Haitian Scholar Program from Dalian University of Technology
- project of Changzhou Science and Technology [CJ20190013]
Treatment of highly saline wastewaters via conventional technology is a key challenging issue, which calls for efficient desalination membranes featuring high flux and rejection, low fouling, and excellent stability. Herein, we report a high-strength and flexible electro-conductive stainless steel-carbon nanotube (SS-CNT) membrane, exhibiting significantly enhanced anticorrosion and antifouling ability via a microelectrical field-coupling strategy during membrane distillation. The membrane substrates exhibited excellent mechanical strength (244.2 +/- 9.8 MPa) and ductility, thereby overcoming the critical bottleneck of brittleness of traditional inorganic membranes. By employing a simple surface activation followed by self-catalyzed chemical vapor deposition, CNT was grown in situ on SS substrates via a tip-growth mechanism to finally form robust superhydrophobic SS-CNT membrane. To address the challenging issues of significant corrosion and fouling, using a negative polarization microelectrical field-coupling strategy, simultaneously enhanced antifouling and anticorrosion performance was realized for treatment of organic high salinity waters while exhibiting stable high flux and rejection via an electrostatic repulsion and electron supply mechanism. This application-oriented rational design protocol can be potentially used to extend toward high performance composite membranes derived from other electro-conductive metal substrates functionally decorated with CNT network and to other applications in water treatment.
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