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Oxidation of carbon nanomaterials using a nanoparticulate iron oxide catalyst : Direct observations in an electron microscope

Weiland, Fredrik ; Mases, Mattias ; Jacobsson, Daniel LU orcid ; Wahlqvist, David LU ; Ek, Martin LU orcid and Wiinikka, Henrik (2025) In Carbon 234.
Abstract

Understanding of carbon nanomaterials oxidation is useful in many different applications, e.g., for soot emission abatement, or in defect engineering aiming to improve material properties. In this work, the oxidative behavior of three substantially different qualities of carbon black, multiwall carbon-nanotubes, and few-layer graphene, was studied using a combination of macroscale quantification (using thermogravimetric analysis) and nanoscale imaging of their structural evolution (using environmental transmission electron microscopy, ETEM). The materials were investigated both with and without the addition of a nanoparticulate iron oxide catalyst. Catalyst addition clearly lowered the conversion temperature during oxidation. The ETEM... (More)

Understanding of carbon nanomaterials oxidation is useful in many different applications, e.g., for soot emission abatement, or in defect engineering aiming to improve material properties. In this work, the oxidative behavior of three substantially different qualities of carbon black, multiwall carbon-nanotubes, and few-layer graphene, was studied using a combination of macroscale quantification (using thermogravimetric analysis) and nanoscale imaging of their structural evolution (using environmental transmission electron microscopy, ETEM). The materials were investigated both with and without the addition of a nanoparticulate iron oxide catalyst. Catalyst addition clearly lowered the conversion temperature during oxidation. The ETEM revealed that the catalyst nanoparticles induced primary surface damages in the carbon nanostructure at relatively low temperatures. From there, oxidation could proceed more rapidly at recently exposed edge sites due to their higher propensity for oxidation. Thus, the enhanced oxidation was not solely linked to the interface between catalyst and carbon.

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author
; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Carbon nanomaterials, Catalytic oxidation, Electron microscope, In situ, Iron oxide
in
Carbon
volume
234
article number
119896
publisher
Elsevier
external identifiers
  • scopus:85214211083
ISSN
0008-6223
DOI
10.1016/j.carbon.2024.119896
language
English
LU publication?
yes
additional info
Publisher Copyright: © 2024 The Author(s)
id
11d31849-22e4-4dee-8849-ba337d2b444f
date added to LUP
2025-03-14 09:48:32
date last changed
2025-04-04 14:06:29
@article{11d31849-22e4-4dee-8849-ba337d2b444f,
  abstract     = {{<p>Understanding of carbon nanomaterials oxidation is useful in many different applications, e.g., for soot emission abatement, or in defect engineering aiming to improve material properties. In this work, the oxidative behavior of three substantially different qualities of carbon black, multiwall carbon-nanotubes, and few-layer graphene, was studied using a combination of macroscale quantification (using thermogravimetric analysis) and nanoscale imaging of their structural evolution (using environmental transmission electron microscopy, ETEM). The materials were investigated both with and without the addition of a nanoparticulate iron oxide catalyst. Catalyst addition clearly lowered the conversion temperature during oxidation. The ETEM revealed that the catalyst nanoparticles induced primary surface damages in the carbon nanostructure at relatively low temperatures. From there, oxidation could proceed more rapidly at recently exposed edge sites due to their higher propensity for oxidation. Thus, the enhanced oxidation was not solely linked to the interface between catalyst and carbon.</p>}},
  author       = {{Weiland, Fredrik and Mases, Mattias and Jacobsson, Daniel and Wahlqvist, David and Ek, Martin and Wiinikka, Henrik}},
  issn         = {{0008-6223}},
  keywords     = {{Carbon nanomaterials; Catalytic oxidation; Electron microscope; In situ; Iron oxide}},
  language     = {{eng}},
  month        = {{03}},
  publisher    = {{Elsevier}},
  series       = {{Carbon}},
  title        = {{Oxidation of carbon nanomaterials using a nanoparticulate iron oxide catalyst : Direct observations in an electron microscope}},
  url          = {{http://dx.doi.org/10.1016/j.carbon.2024.119896}},
  doi          = {{10.1016/j.carbon.2024.119896}},
  volume       = {{234}},
  year         = {{2025}},
}