Preparation and Transport Performances of High-Density, Aligned Carbon Nanotube Membranes

Lei Zhang, Bin Zhao, Chuan Jiang, Junhe Yang, Guangping Zheng

Research output: Journal article publicationJournal articleAcademic researchpeer-review

17 Citations (Scopus)

Abstract

We report a simple and effective method for the preparation of high-density and aligned carbon nanotube (CNT) membranes. The CNT arrays were prepared by water-assisted chemical vapor deposition (CVD) and were subsequently pushed over and stacked into dense membranes by mechanical rolling. It was demonstrated that various gases and liquids, including H2, He, N2, O2, Ar, water, ethanol, hexane, and kerosene, could effectively pass through the aligned carbon nanotube membranes. The membranes exhibited different selections on different gases, indicating that there was a separation potential for the gas mixtures. The selectivities (H2 relative to other gases) of H2/He, H2/N2, H2/O2, and H2/Ar were found to be lower than that of the ideal Knudsen model. For pure water, the permeability was measured to be 3.23 ± 0.05 ml·min−1·cm−2 at 1 atm, indicating that the CNT membranes were promising for applications in liquid filtration and separation.
Original languageEnglish
Article number266
JournalNanoscale Research Letters
Volume10
Issue number1
DOIs
Publication statusPublished - 24 Dec 2015

Keywords

  • Carbon nanotubes
  • Gas transport
  • Liquid transport
  • Nano-filtration membrane
  • Separation

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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