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Co metal nanoparticles deposition inside or outside multi-walled carbon nanotubes via facile support pretreatment
- Source :
- Applied Surface Science, Applied Surface Science, Elsevier, 2018, 456, pp.657-665. ⟨10.1016/j.apsusc.2018.06.124⟩
- Publication Year :
- 2018
- Publisher :
- Elsevier BV, 2018.
-
Abstract
- 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.
- Subjects :
- Materials science
General Physics and Astronomy
Nanoparticle
02 engineering and technology
Surfaces and Interfaces
General Chemistry
Carbon nanotube
Penetration (firestop)
010402 general chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
01 natural sciences
0104 chemical sciences
Surfaces, Coatings and Films
law.invention
Ferromagnetism
Chemical engineering
law
Transmission electron microscopy
0210 nano-technology
High-resolution transmission electron microscopy
Porosity
[PHYS.COND.CM-SCM]Physics [physics]/Condensed Matter [cond-mat]/Soft Condensed Matter [cond-mat.soft]
ComputingMilieux_MISCELLANEOUS
Powder diffraction
Subjects
Details
- ISSN :
- 01694332
- Volume :
- 456
- Database :
- OpenAIRE
- Journal :
- Applied Surface Science
- Accession number :
- edsair.doi.dedup.....94969b29a8be2971d07d281fd7198cc6
- Full Text :
- https://doi.org/10.1016/j.apsusc.2018.06.124