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学科主题物理化学
NMR Study of Preferential Endohedral Adsorption of Methanol in Multiwalled Carbon Nanotubes
Liu, Xin; Pan, Xiulian; Shen, Wanling; Ren, Pengju; Han, Xiuwen; Bao, Xinhe; Bao XH(包信和)
刊名JOURNAL OF PHYSICAL CHEMISTRY C
2012-04-12
DOI10.1021/jp300138x
116期:14页:7803-7809
收录类别SCI
文章类型Article
部门归属5
项目归属502
产权排名1,1
类目[WOS]Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
研究领域[WOS]Chemistry ; Science & Technology - Other Topics ; Materials Science
关键词[WOS]PHYSICAL ADSORPTION ; WATER-ADSORPTION ; XE ADSORPTION ; TIGHT-BINDING ; SINGLE ; SPECTROSCOPY ; KINETICS ; STORAGE ; MODELS ; XENON
英文摘要Adsorption of C-13-enriched methanol in multiwalled carbon nanotubes (MWNTs) was systematically studied under well-controlled environment by C-13 MAS NMR. The results of variable-pressure experiments indicate that the endohedral adsorption of methanol in carbon nanotubes (CNTs) is preferential over the exohedral adsorption. The exohedral adsorption does not occur until the endohedral adsorption saturates. The C-13 chemical shift of endohedral methanol exhibits a large upfield shift due to the strong spatial diamagnetic shielding effect induced by the delocalized electrons of nanotubes under the influence of external magnetic field. The exohedral methanol is also shielded, but to a lesser extent. DFT calculations support these experimental results. The C-13 spin lattice relaxation times, T-1, of endohedral and exohedral methanol were also measured, and they have different vapor pressure dependence at room temperature. Furthermore, variable-temperature experiments suggest that methanol molecules inside CNTs may form a layered structure at low temperature with one layer close to the wall and the second layer near the center of the nanotubes.
语种英语
WOS记录号WOS:000302591300025
引用统计
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/118352
专题中国科学院大连化学物理研究所
通讯作者Bao XH(包信和)
作者单位Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
推荐引用方式
GB/T 7714
Liu, Xin,Pan, Xiulian,Shen, Wanling,et al. NMR Study of Preferential Endohedral Adsorption of Methanol in Multiwalled Carbon Nanotubes[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2012,116(14):7803-7809.
APA Liu, Xin.,Pan, Xiulian.,Shen, Wanling.,Ren, Pengju.,Han, Xiuwen.,...&包信和.(2012).NMR Study of Preferential Endohedral Adsorption of Methanol in Multiwalled Carbon Nanotubes.JOURNAL OF PHYSICAL CHEMISTRY C,116(14),7803-7809.
MLA Liu, Xin,et al."NMR Study of Preferential Endohedral Adsorption of Methanol in Multiwalled Carbon Nanotubes".JOURNAL OF PHYSICAL CHEMISTRY C 116.14(2012):7803-7809.
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