Carbon nanotube membranes with ultrahigh specific adsorption capacity for water desalination and purification

Yang, Hui Ying, Han, Zhao Jun, Yu, Siu Fung, Pey, Kin Leong, Ostrikov, Kostya, & Karnik, Rohit (2013) Carbon nanotube membranes with ultrahigh specific adsorption capacity for water desalination and purification. Nature Communications, 4, p. 2220.

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Abstract

Development of technologies for water desalination and purification is critical to meet the global challenges of insufficient water supply and inadequate sanitation, especially for point-of-use applications. Conventional desalination methods are energy and operationally intensive, whereas adsorption-based techniques are simple and easy to use for point-of-use water purification, yet their capacity to remove salts is limited. Here we report that plasma-modified ultralong carbon nanotubes exhibit ultrahigh specific adsorption capacity for salt (exceeding 400% by weight) that is two orders of magnitude higher than that found in the current state-of-the-art activated carbon-based water treatment systems. We exploit this adsorption capacity in ultralong carbon nanotube-based membranes that can remove salt, as well as organic and metal contaminants. These ultralong carbon nanotube-based membranes may lead to next-generation rechargeable, point-of-use potable water purification appliances with superior desalination, disinfection and filtration properties. © 2013 Macmillan Publishers Limited.

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ID Code: 73515
Item Type: Journal Article
Refereed: Yes
Additional URLs:
DOI: 10.1038/ncomms3220
ISSN: 2041-1723
Divisions: Current > QUT Faculties and Divisions > Science & Engineering Faculty
Deposited On: 08 Jul 2014 05:31
Last Modified: 05 Aug 2014 04:09

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