Co Metal Nanoparticles Deposition Inside or Outside Multi-Walled Carbon Nanotubes via Facile Support Pretreatment
Full article
| Общее |
Language:
Английский,
Genre:
Full article,
Status:
Published,
Source type:
Original
|
| Journal |
Applied Surface Science
ISSN: 0169-4332
|
| Output data |
Year: 2018,
Volume: 456,
Pages: 657-665
Pages count
: 9
DOI:
10.1016/j.apsusc.2018.06.124
|
| Tags |
Co/MWCNT hybrids; Metal-support interaction; Ferromagnetism; 59Co NMR; HRTEM; In-situ XRD |
| Authors |
Kazakova Mariya A.
1,2
,
Andreev Andrey S.
2,3
,
Selyutin Alexander G.
2
,
Ishchenko Arcady V.
1,2
,
Shuvaev Alexander V.
4
,
Kuznetsov Vladimir L.
1,2
,
Lapina Olga B.
1,2
,
d'Espinose de Lacaillerie Jean-Baptiste
3
|
| Affiliations |
| 1 |
Novosibirsk State University, Pirogova 2, Novosibirsk 630090, Russia
|
| 2 |
Boreskov Institute of Catalysis, SB RAS, Lavrentieva 5, Novosibirsk 630090, Russia
|
| 3 |
Soft Matter Science and Engineering (SIMM), UMR CNRS 7615, PSL Research University, ESPCI Paris, Paris 75005, France
|
| 4 |
Siberian Transport University, D. Kovalchuk 191, Novosibirsk 630049, Russia
|
|
Funding (4)
|
1
|
Russian Foundation for Basic Research
|
16-32-60046
|
|
2
|
Russian Foundation for Basic Research
|
17-53-150018
|
|
3
|
French Embassy in Moscow
|
|
|
4
|
The City of Paris Industrial Physics and Chemistry Higher Educational Institution
|
Société des Amis de l’ESPCI
|
Decoration of one-dimensional multi-walled carbon nanotubes (MWCNTs) with zero-dimensional Co nanoparticles leads to hybrid structures with chemical and electromagnetic features that are not available to the individual components. This work addresses the influence of the nature and structure of MWCNTs on the localization of Co nanoparticles. Depending on synthesis conditions, Co can be deposited on the external or in inner surfaces of the nanotubes. Co/MWCNTs hybrids have been characterized by in situ X-ray powder diffraction, high-resolution transmission electron microscopy and 59Co internal field nuclear magnetic resonance. It has been shown that the average diameter (7.2, 9.4 and 18.6 nm), number of walls (5–7, 12–15, 15–20), and functional composition of the MWCNTs have a remarkable effect on the size of Co nanoparticles and their distribution in the structure of MWCNTs. The observed phenomenon has been rationalized in terms of nanotubes surface properties. Parent MWCNTs being hydrophobic and having limited porosity do not stabilize Co nanoparticles and, therefore, they are localized on the outside surface with relatively large average size and broad size distribution. On the other hand, the oxidation of the MWCNTs resulted in the penetration of Co nanoparticles inside of the nanotubes, presumably because of pore opening as well as increased hydrophilicity of the nanotubes.