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    Removal of natural organic matter in water using functionalised carbon nanotube buckypaper

    Year: 2013

    Journal: Carbon, 2013, 59, pp 160-166, 20130926

    Authors: Xiaoshuang Yang, Jieun Lee, Lixiang Yuan, So-Ryong Chae, Vanessa K. Peterson, Andrew I. Minett, Yongbai Yin, Andrew T. Harris

    Organizations: Laboratory for Sustainable Technology, School of Chemical and Biomolecular Engineering, The University of Sydney, NSW 2006, Australia; Australian Nuclear Science and Technology Organisation, Lucas Heights, NSW 2234, Australia; School of Chemical and Biomolecular Engineering, The University of Sydney, NSW 2006, Australia; Applied and Plasma Physics Group, School of Physics, The University of Sydney, NSW 2006, Australia

    A simple, surfactant-free assembly process was used to prepare multi-wall carbon nanotube (CNT) buckypapers using a highly efficient purification, sonication, and filtration process. To achieve effective dispersion of CNT into ethanol, a minimum 5-min sonication time was required. Here, we fabricated a buckypaper with pore size of 41 ± 10 nm and porosity of 72.9% with a 10-min sonication. The as-prepared buckypaper was used as a membrane for humic acid (HA) removal from water. During purification process, carboxylic and hydroxylic functional groups were introduced onto the CNT surface. The functional groups increased the hydrophilicity of the CNTs and improved the removal efficiency of HA by the buckypaper. The buckypaper prepared from purified CNTs exhibited excellent removal of HA (>93%) and a long lifetime for filtration.