DICP OpenIR
Subject Area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)
Source PublicationJOURNAL OF PHYSICAL CHEMISTRY C
2012-04-12
DOI10.1021/jp300138x
Volume116Issue:14Pages:7803-7809
Indexed BySCI
SubtypeArticle
Department5
Funding Project502
Contribution Rank1,1
WOS SubjectChemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science
WOS KeywordPHYSICAL ADSORPTION ; WATER-ADSORPTION ; XE ADSORPTION ; TIGHT-BINDING ; SINGLE ; SPECTROSCOPY ; KINETICS ; STORAGE ; MODELS ; XENON
AbstractAdsorption 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.
Language英语
WOS IDWOS:000302591300025
Citation statistics
Cited Times:18[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/118352
Collection中国科学院大连化学物理研究所
Corresponding AuthorBao XH(包信和)
AffiliationChinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
Recommended Citation
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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