Constructing all carbon nanotube hollow fiber membranes with improved performance in separation and antifouling for water treatment.
Constructing all carbon nanotube hollow fiber membranes with improved performance in separation and antifouling for water treatment.
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DOI：
10.1021/es500506w
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发表时间：
2014-06
影响因子：
11.4
通讯作者：
Gaoliang Wei;Hongtao Yu;X. Quan;Shuo Chen;Huimin Zhao;Xinfei Fan
中科院分区：
文献类型：
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作者：
Gaoliang Wei;Hongtao Yu;X. Quan;Shuo Chen;Huimin Zhao;Xinfei Fan
将碳纳米管（CNT）通过工程改造成具有上级性能的先进膜，用于水的消毒和净化，显示出巨大的前景，但具有挑战性。本文首次提出了一种将碳纳米管组装成具有可调内/外径和结构的新型中空纤维膜的方法。这些完全由CNT组成的自支撑膜的特征在于86±5%的孔隙率和在0.04 MPa的跨膜压差下约460±50 L m（-2）h（-1）的渗透通量。碳纳米管的随机取向的交织结构赋予膜相当大的阻力孔堵塞。此外，CNT中空纤维膜的吸附能力，这是至关重要的小的和痕量的污染物分子的有效去除，是约2个数量级高于商业聚偏氟乙烯中空纤维膜。CNT中空纤维膜优于其他商业膜的独特优点是它们可以在吸附饱和后原位电化学再生。
Manipulating carbon nanotubes (CNTs) through engineering into advanced membranes with superior performance for disinfection and decontamination of water shows great promise but is challenging. In this paper, a facile assembly of CNTs into novel hollow fiber membranes with tunable inner/outer diameters and structures is developed for the first time. These free-standing membranes composed entirely of CNTs feature a porosity of 86±5% and a permeation flux of about 460±50 L m(-2) h(-1) at a pressure differential of 0.04 MPa across the membrane. The randomly oriented interwoven structure of CNTs endows the membranes considerable resistance to pore blockage. Moreover, the adsorption capability of the CNT hollow fiber membranes, which is crucial in the efficient removal of small and trace contaminant molecules, is about 2 orders of magnitude higher than that of commercial polyvinylidene fluoride hollow fiber membranes. The unique advantage of the CNT hollow fiber membranes over other commercial membranes is that they can be in situ electrochemically regenerated after adsorption saturation.