Design of Silica Nanoparticles-Supported Metal Catalyst by Wet Impregnation with Catalytic Performance for Tuning Carbon Nanotubes Growth
| Autor: | Damien Lenoble, Tairan da Cunha, Didier Arl, Benoit Duez, Yves Fleming, Jérôme Guillot, Alberto Maulu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Annealing (metallurgy) Oxide Nanoparticle chemistry.chemical_element TP1-1185 Carbon nanotube Catalysis law.invention Metal chemistry.chemical_compound SiO2 nanoparticles law Calcination Physical and Theoretical Chemistry QD1-999 metal nanocatalyst Chemical technology Chemistry CNT growth Chemical engineering chemistry visual_art visual_art.visual_art_medium wet impregnation metal acetylacetonate Cobalt |
| Zdroj: | Catalysts Volume 11 Issue 8 Catalysts, Vol 11, Iss 986, p 986 (2021) |
| ISSN: | 2073-4344 |
| DOI: | 10.3390/catal11080986 |
| Popis: | The catalytic activity of cobalt and iron nanoparticles for the growth of carbon nanotubes (CNTs) was studied by a specific reproducible and up-scalable fabrication method. Co and Fe catalysts were deposited over SiO2 nanoparticles by a wet-impregnation method and two different annealing steps were applied for the catalyst formation/activation. The samples were calcined at an optimal temperature of 450 °C resulting in the formation of metal oxide nano-islands without the detection of silicates. Further reduction treatment (700 °C) under H2 successfully converted oxide nanoparticles to Co and Fe metallic species. Furthermore, the catalytic efficiency of both supported-metal nanoparticles at 2 and 5% in weight of silica was evaluated through the growth of CNTs. The CNT structure, morphology and size dispersion were tailored according to the metal catalyst concentration. |
| Databáze: | OpenAIRE |
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