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Co metal nanoparticles deposition inside or outside multi-walled carbon nanotubes via facile support pretreatment

Authors :
Andrey S. Andreev
Mariya A. Kazakova
Arcady V. Ishchenko
Alexander V. Shuvaev
Jean-Baptiste d'Espinose de Lacaillerie
Olga B. Lapina
Vladimir L. Kuznetsov
Alexander G. Selyutin
Novosibirsk State University (NSU)
Boreskov Institute of Catalysis
Siberian Branch of the Russian Academy of Sciences (SB RAS)
Sciences et Ingénierie de la Matière Molle (UMR 7615) (SIMM)
Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris)
Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut de Chimie du CNRS (INC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)
Siberian Transport University
Genome Institute of Singapore (GIS)
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.

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