Physical Methods for the Preparation of Cobalt Nanoparticles for Use in the Synthesis of Multiwalled Carbon Nanotubes
The aim of this work was to obtain cobalt nanoparticles through a physical method, which could be formed simultaneously during the Catalytic Chemical Vapour Deposition (CCVD) synthesis of carbon nanotubes, under conditions suitable for both carbon nanotube synthesis and Co-nanoparticle formation. Co...
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MDPI AG
2024-12-01
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| Series: | Inorganics |
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| Online Access: | https://www.mdpi.com/2304-6740/13/1/7 |
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| author | Nicolas Moreau Antonio Fonseca Danilo Vuono Joseph Delhalle Zineb Mekhalif Pierantonio De Luca Janos B.Nagy |
| author_facet | Nicolas Moreau Antonio Fonseca Danilo Vuono Joseph Delhalle Zineb Mekhalif Pierantonio De Luca Janos B.Nagy |
| author_sort | Nicolas Moreau |
| collection | DOAJ |
| description | The aim of this work was to obtain cobalt nanoparticles through a physical method, which could be formed simultaneously during the Catalytic Chemical Vapour Deposition (CCVD) synthesis of carbon nanotubes, under conditions suitable for both carbon nanotube synthesis and Co-nanoparticle formation. Co nanoparticles were prepared by Physical Vapour Deposition (PVD) using a 0.05 m<sup>3</sup> magnetron on two different substrates, SiO<sub>2</sub>/Si and C, followed by a reduction treatment in an H<sub>2</sub> atmosphere. Transmission Electron Microscopy (TEM) and Field Enhanced Scanning Electron Microscopy (FE-SEM) were used to characterize the Co nanoparticles. On the SiO<sub>2</sub>/Si substrate, cobalt silicate is formed, which stabilizes the Co nanoparticles, while the nanoparticles obtained on the C-substrate are sometimes surrounded by a layer of Co<sub>3</sub>O<sub>4</sub>, which deactivates the cobalt nanoparticles. To obtain suitable Co nanoparticles for carbon nanotube synthesis, the optimal Co-layer thickness is between 20 and 30 Å, and the optimal reduction temperature is 800 °C and 450 °C for SiO<sub>2</sub>/Si and C substrates, respectively. |
| format | Article |
| id | doaj-art-16a346948e4341a4a02a2a042c1038cd |
| institution | Kabale University |
| issn | 2304-6740 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Inorganics |
| spelling | doaj-art-16a346948e4341a4a02a2a042c1038cd2025-01-24T13:35:27ZengMDPI AGInorganics2304-67402024-12-01131710.3390/inorganics13010007Physical Methods for the Preparation of Cobalt Nanoparticles for Use in the Synthesis of Multiwalled Carbon NanotubesNicolas Moreau0Antonio Fonseca1Danilo Vuono2Joseph Delhalle3Zineb Mekhalif4Pierantonio De Luca5Janos B.Nagy6Laboratoire de Chimie et d’Electrochimie des Surfaces, Université de Namur, 5000 Namur, BelgiumLaboratoire de Chimie et d’Electrochimie des Surfaces, Université de Namur, 5000 Namur, BelgiumInstitute on Membrane Technology (ITM-CNR), 87036 Rende, CS, ItalyLaboratoire de Chimie et d’Electrochimie des Surfaces, Université de Namur, 5000 Namur, BelgiumLaboratoire de Chimie et d’Electrochimie des Surfaces, Université de Namur, 5000 Namur, BelgiumDipartimento di Ingegneria Meccanica, Energetica e Gestionale, Università della Calabria, 87036 Rende, CS, ItalyDipartimento di Ingegneria Meccanica, Energetica e Gestionale, Università della Calabria, 87036 Rende, CS, ItalyThe aim of this work was to obtain cobalt nanoparticles through a physical method, which could be formed simultaneously during the Catalytic Chemical Vapour Deposition (CCVD) synthesis of carbon nanotubes, under conditions suitable for both carbon nanotube synthesis and Co-nanoparticle formation. Co nanoparticles were prepared by Physical Vapour Deposition (PVD) using a 0.05 m<sup>3</sup> magnetron on two different substrates, SiO<sub>2</sub>/Si and C, followed by a reduction treatment in an H<sub>2</sub> atmosphere. Transmission Electron Microscopy (TEM) and Field Enhanced Scanning Electron Microscopy (FE-SEM) were used to characterize the Co nanoparticles. On the SiO<sub>2</sub>/Si substrate, cobalt silicate is formed, which stabilizes the Co nanoparticles, while the nanoparticles obtained on the C-substrate are sometimes surrounded by a layer of Co<sub>3</sub>O<sub>4</sub>, which deactivates the cobalt nanoparticles. To obtain suitable Co nanoparticles for carbon nanotube synthesis, the optimal Co-layer thickness is between 20 and 30 Å, and the optimal reduction temperature is 800 °C and 450 °C for SiO<sub>2</sub>/Si and C substrates, respectively.https://www.mdpi.com/2304-6740/13/1/7carbon nanotubesnanoparticlesco-nanoparticlesPhysical Vapour DepositionPVD |
| spellingShingle | Nicolas Moreau Antonio Fonseca Danilo Vuono Joseph Delhalle Zineb Mekhalif Pierantonio De Luca Janos B.Nagy Physical Methods for the Preparation of Cobalt Nanoparticles for Use in the Synthesis of Multiwalled Carbon Nanotubes Inorganics carbon nanotubes nanoparticles co-nanoparticles Physical Vapour Deposition PVD |
| title | Physical Methods for the Preparation of Cobalt Nanoparticles for Use in the Synthesis of Multiwalled Carbon Nanotubes |
| title_full | Physical Methods for the Preparation of Cobalt Nanoparticles for Use in the Synthesis of Multiwalled Carbon Nanotubes |
| title_fullStr | Physical Methods for the Preparation of Cobalt Nanoparticles for Use in the Synthesis of Multiwalled Carbon Nanotubes |
| title_full_unstemmed | Physical Methods for the Preparation of Cobalt Nanoparticles for Use in the Synthesis of Multiwalled Carbon Nanotubes |
| title_short | Physical Methods for the Preparation of Cobalt Nanoparticles for Use in the Synthesis of Multiwalled Carbon Nanotubes |
| title_sort | physical methods for the preparation of cobalt nanoparticles for use in the synthesis of multiwalled carbon nanotubes |
| topic | carbon nanotubes nanoparticles co-nanoparticles Physical Vapour Deposition PVD |
| url | https://www.mdpi.com/2304-6740/13/1/7 |
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