Journal
AUSTRALIAN JOURNAL OF CHEMISTRY
Volume 60, Issue 7, Pages 519-523Publisher
CSIRO PUBLISHING
DOI: 10.1071/CH06409
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The effects of nitric acid treatment and subsequent heat treatment on the hydrogen adsorption properties of single-walled carbon nanotube (SWCNT) samples were investigated. The hydrogen adsorption and desorption isotherms of SWCNTs treated with nitric acid alone and SWCNTs treated with nitric acid and then heated were measured at 77 and 303K over the hydrogen pressure range 0 - 3.5 MPa. Nitric acid treatment increased hydrogen adsorption by opening the nanotubes and changing the bundle structure. Subsequent heat treatment of the acid-treated SWCNT sample further increased hydrogen adsorption by removing functional groups introduced by the acid treatment.
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