Skip to Main content Skip to Navigation
Journal articles

Thermal Decomposition of Co-Doped Calcium Tartrate and Use of the Products for Catalytic Chemical Vapor Deposition Synthesis of Carbon Nanotubes.

Abstract : Thermal decomposition of Co-doped calcium tartrate in an inert atmosphere or air was studied using thermogravimetric analysis and X-ray absorption fine structure (XAFS) spectroscopy. It was shown that the powder substance containing 4 at.% of cobalt completely decomposes within 650-730 °C, depending on the environment, and the formation of Co clusters does not proceed before 470 °C. The products of decomposition were characterized by transmission electron microscopy, XAFS, and X-ray photoelectron spectroscopy. Surfaceoxidized Co metal nanoparticles as large as ∼5.6 ( 1.2 nm were found to form in an inert atmosphere, while the annealing in air led to a wide distribution of diameters of the nanoparticles, with the largest nanoparticles (30-50 nm) mainly present as a Co3O4 phase. It was found that the former nanoparticles catalyze the growth of CNTs from alcohol while a reducing atmosphere is required for activation of the latter nanoparticles. We propose the scheme of formation of CaO-supported catalyst from Co-doped tartrate, depending on the thermal decomposition conditions.
Document type :
Journal articles
Complete list of metadata

https://hal.archives-ouvertes.fr/hal-03468651
Contributor : Open Archive Toulouse Archive Ouverte (OATAO) Connect in order to contact the contributor
Submitted on : Tuesday, December 7, 2021 - 11:38:37 AM
Last modification on : Tuesday, September 27, 2022 - 4:09:19 AM

File

Flahaut_8748.pdf
Files produced by the author(s)

Identifiers

Citation

Igor P. Asanov, Tatyana I. Asanova, Lyubov Gennadievna Bulusheva, Elena V. Shlyakhova, Alexander Vladimirovich Okotrub, et al.. Thermal Decomposition of Co-Doped Calcium Tartrate and Use of the Products for Catalytic Chemical Vapor Deposition Synthesis of Carbon Nanotubes.. Journal of Physical Chemistry C, American Chemical Society, 2012, pp. 116 (1), pp.343-351. ⟨10.1021/jp2092169⟩. ⟨hal-03468651⟩

Share

Metrics

Record views

8

Files downloads

14