DICP OpenIR
Subject Area物理化学
Diffusion of Water Inside Carbon Nanotubes Studied by Pulsed Field Gradient NMR Spectroscopy
Liu, Xin1; Pan, Xiulian1; Zhang, Shanmin2; Han, Xiuwen1; Bao, Xinhe1; Bao XH(包信和)
Source PublicationLANGMUIR
2014-07-15
DOI10.1021/la500913r
Volume30Issue:27Pages:8036-8045
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Multidisciplinary ; Chemistry, Physical ; Materials Science, Multidisciplinary
WOS Research AreaChemistry ; Materials Science
WOS KeywordSINGLE-FILE DIFFUSION ; SELF-DIFFUSION ; MASS-TRANSPORT ; SURFACE-AREA ; FLUID-FLOW ; MEMBRANES ; CATALYSIS ; ZEOLITES ; MCM-41 ; DIFFUSIVITIES
AbstractDiffusion dynamics of guest molecules in nanopores has been studied intensively because diffusion is center on a number of research fields such as separation, drug delivery, chemical reactions, and sensing. In the present work, we report an experimental investigation of the self-diffusion of water inside carbon nanotube (CNT) channels using a pulsed field gradient (PFG) NMR method. The dispersion of CNTs homogeneously in water and cooling to temperatures below the melting point of bulk water allow us to probe the translational motion of confined water molecules. The results demonstrate that the self-diffusion coefficient of water in CNTs is highly dependent on the diffusion time and CNT diameter. In particular, the diffusivity of water in double-walled carbon nanotubes (DWNTs) with an average inner diameter of 2.3 +/- 0.3 nm is twice that in multiwalled carbon nanotubes (MWNTs) with an average inner diameter of 6.7 +/- 0.8 nm in the temperature range of 263-223 K. In addition, the effective self-diffusion coefficient in DWNTs is 1 order of magnitude higher than that reported for mesoporous silica materials with a similar pore size. The faster diffusivity of water in CNTs could be attributed to the ordered hydrogen bonds formed between water molecules within the confined channels of CNTs and the weak interaction between water and the CNT walls.
Language英语
WOS IDWOS:000339229000014
Citation statistics
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/144269
Collection中国科学院大连化学物理研究所
Corresponding AuthorBao XH(包信和)
Affiliation1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.E China Normal Univ, Dept Phys, Shanghai Key Lab Magnet Resonance, Shanghai 200062, Peoples R China
Recommended Citation
GB/T 7714
Liu, Xin,Pan, Xiulian,Zhang, Shanmin,et al. Diffusion of Water Inside Carbon Nanotubes Studied by Pulsed Field Gradient NMR Spectroscopy[J]. LANGMUIR,2014,30(27):8036-8045.
APA Liu, Xin,Pan, Xiulian,Zhang, Shanmin,Han, Xiuwen,Bao, Xinhe,&包信和.(2014).Diffusion of Water Inside Carbon Nanotubes Studied by Pulsed Field Gradient NMR Spectroscopy.LANGMUIR,30(27),8036-8045.
MLA Liu, Xin,et al."Diffusion of Water Inside Carbon Nanotubes Studied by Pulsed Field Gradient NMR Spectroscopy".LANGMUIR 30.27(2014):8036-8045.
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