Jump to main content
Jump to site search

Issue 8, 2019
Previous Article Next Article

Low-temperature activation of carbon black by selective photocatalytic oxidation

Author affiliations

Abstract

Carbon black is chemically modified by selective photocatalytic oxidation, removing amorphous carbon and functionalizing the graphitic fraction to produce porous, graphitized carbon black, commonly used as an adsorbent in chromatography. In contrast to pyrolytic treatments, this photocatalytic modification proceeds under mild reaction conditions using oxygen, nitric oxide, water vapor and a titanium dioxide photocatalyst at 150 °C. The photo-oxidation can be performed both with the photocatalyst in close proximity (contact mode) or physically separated from the carbon. Structural analysis of remotely photo-oxidized carbon black reveals increased hydrophilic properties as compared to pyrolysis at 700 °C in a N2 atmosphere. Carbon black photo-oxidation selectively mineralizes sp3-hybridized carbon, leading to enhanced graphitization. This results in an overall improved structural ordering by enriching carbon black with sp2-hybridized graphitic carbon showing decreased interplanar distance, accompanied by a twofold increase in the specific surface area. In addition, the photo-oxidized material is activated by the presence of oxygen functionalities on the graphitic carbon fraction, further enhancing the adsorptive properties.

Graphical abstract: Low-temperature activation of carbon black by selective photocatalytic oxidation

Back to tab navigation

Supplementary files

Article information


Submitted
27 Mar 2019
Accepted
21 May 2019
First published
22 May 2019

This article is Open Access

Nanoscale Adv., 2019,1, 2873-2880
Article type
Paper

Low-temperature activation of carbon black by selective photocatalytic oxidation

N. R. Ostyn, J. A. Steele, M. De Prins, S. P. Sree, C. V. Chandran, W. Wangermez, G. Vanbutsele, J. W. Seo, M. B. J. Roeffaers, E. Breynaert and J. A. Martens, Nanoscale Adv., 2019, 1, 2873
DOI: 10.1039/C9NA00188C

This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material and it is not used for commercial purposes.

Reproduced material should be attributed as follows:

  • For reproduction of material from NJC:
    [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the Centre National de la Recherche Scientifique (CNRS) and the RSC.
  • For reproduction of material from PCCP:
    [Original citation] - Published by the PCCP Owner Societies.
  • For reproduction of material from PPS:
    [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the European Society for Photobiology, the European Photochemistry Association, and RSC.
  • For reproduction of material from all other RSC journals:
    [Original citation] - Published by The Royal Society of Chemistry.

Information about reproducing material from RSC articles with different licences is available on our Permission Requests page.


Social activity

Search articles by author

Spotlight

Advertisements