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GAMMA-RAY IRRADIATION-INDUCED IMPROVEMENT OF HYDROGEN ADSORPTION IN MULTI-WALLED CARBON NANOTUBES
WEN QIAN,JIAFU CHEN,LINGZHI WEI,LIUSUO WU,QIANWANG CHEN 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2009 NANO Vol.4 No.1
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 γ-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 γ-ray irradiation increased the hydrogen adsorption capacity due to the increasing number of defects created by γ-photons, but would reach the maximum when defect concentration achieves saturation.