129Xe NMR Study of Xe Adsorption on Multiwall Carbon Nanotubes
Full article
| Общее |
Language:
Английский,
Genre:
Full article,
Status:
Published,
Source type:
Original
|
| Journal |
Solid State Nuclear Magnetic Resonance
ISSN: 0926-2040
, E-ISSN: 1527-3326
|
| Output data |
Year: 2005,
Volume: 28,
Number: 2-4,
Pages: 135-141
Pages count
: 7
DOI:
10.1016/j.ssnmr.2005.07.004
|
| Tags |
129Xe NMR, Carbon nanotubes, Porosity |
| Authors |
Romanenko K.V.
1,2
,
Fonseca A.
3
,
Dumonteil S.
3
,
Nagy J.B.
3
,
d’Espinose de Lacaillerie J.
2
,
Lapina O.B.
1
,
Fraissard J.
2
|
| Affiliations |
| 1 |
Boreskov Institute of Catalysis SB RAS
|
| 2 |
The City of Paris Industrial Physics and Chemistry Higher Educational Institution
|
| 3 |
University of Namur
|
|
Funding (1)
|
1
|
Russian Foundation for Basic Research
|
04-03-33070
|
129Xe NMR spectroscopy has been used to study the adsorption of Xe on multi-wall carbon nanotubes (MWCNT). The results obtained have shown the 129Xe NMR ability to probe the intercrystalline (aggregate) and the inner porosity of CNT. In particular, the effects on porosity of tubes openings by hydrogen exposure and of ball milling were examined. Dramatic changes observed in the 129Xe NMR spectra after moderate ball milling of MWCNTs were attributed to the destruction of the initial intercrystalline pore structure and to the Xe access inside the nanotubes. To examine the exchange dynamics the mixture of as-made and milled MWCNTs was studied with one- and two-dimensional (1D and 2D) 129Xe NMR. The exchange between the interior of milled nanotubes and the aggregate pores of as-made MWCNTs was fast on the NMR acquisition time scale. The Xenon exchange between the interior of the as-made MWCNTs and the large aggregate pores occurred on a longer time scale of 10 ms, as was established by 2D 129Xe NMR exchange spectroscopy. Variable temperature 129Xe NMR data were also discussed and analyzed in terms of the fast exchange approximation.