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采用X射线吸收精细结构光谱探索性地研究了多壁碳纳米管束.在多壁碳纳米管束不同入射角的X射线吸收精细结构光谱中,观察到C—Hσ共振峰强度随入射角的变化而发生变化.在常温常压下出现C—H键可能与多壁碳纳米管束中存在缺陷有关,缺陷数量越大C—Hσ共振峰的强度越大.光谱中C—Cπ和C—Cσ共振峰强度的变化趋势都不同于C—Hσ共振峰,这有力地证明了在常温常压条件下氢原子是吸附在多壁碳纳米管内表面的缺陷上.这些结果表明X射线吸收精细结构光谱是表征碳纳米管的有力工具.
The multi-walled carbon nanotube bundles were explored using X-ray absorption fine structure spectra.In the X-ray absorption fine structure spectrum of multi-walled carbon nanotube bundles with different incident angles, it was observed that the intensity of C-Hσ resonance peak changed with the incident angle The C-H bond at room temperature and pressure may be related to the existence of defects in the MWCNT bundles, the larger the number of defects is, the greater the intensity of the C-Hσ formant is. The C-Cπ and C-Cσ formants The trend of intensity variation is different from the C-Hσ formant, which strongly proved that the hydrogen atoms are adsorbed on the inner surface of MWCNT under normal temperature and pressure conditions.These results show that X-ray absorption fine structure spectrum is characterized A powerful tool for carbon nanotubes.