Journal
NANO
Volume 4, Issue 1, Pages 7-11Publisher
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S1793292009001459
Keywords
Carbon nanotube; defect; hydrogen adsorption; irradiation effects; physisorption and chemisorption
Funding
- National Natural Science Foundation of China [20321101, 20125103, 90206034]
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An improved hydrogen adsorption capacity of 0.5-0.6 wt% was obtained at room temperature and 10.0 MPa pressure for commercial MWNT sample by gamma-ray irradiation, compared with 0.33 wt% of pristine MWNTs. The irradiation-induced defects in structure, which is favorable for hydrogen adsorption, were characterized by ESR spectrum, elemental analysis, and Raman spectrum. The results show that gamma-ray irradiation increased the hydrogen adsorption capacity due to the increasing number of defects created by gamma-photons, but would reach the maximum when defect concentration achieves saturation.
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