University of Oulu

Guy, F., Runtti, H., Duclaux, L., Ondarts, M., Reinert, L., Outin, J., Gonze, E., Bonnamy, S., & Soneda, Y. (2021). Synthesis and characterization of Cu doped activated carbon beads from chitosan. Microporous and Mesoporous Materials, 322, 111147. https://doi.org/10.1016/j.micromeso.2021.111147

Synthesis and characterization of Cu doped activated carbon beads from chitosan

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Author: Guy, Fabrice1,2; Runtti, Hanna1,3; Duclaux, Laurent1;
Organizations: 1Université Savoie Mont Blanc, Laboratoire Environnements Dynamiques Territoires Montagnes, F-73000, Chambéry, France
2Université Savoie Mont Blanc, Laboratoire d’Optimisation de la Conception et Ingénierie de l’Environnement, F-73000, Chambéry, France
3University of Oulu, Research Unit of Sustainable Chemistry, P.O.Box 4300, FI-90014, Oulu, Finland
4Université Savoie Mont Blanc, Laboratoire Environnements Dynamiques Territoires Montagnes, F-73000, Chambéry, Francev
5ICMN, CNRS-Université d’Orléans, CS 40059, F-45071, Orléans, France
6National Institute of Advanced Industrial Science and Technology, Energy Process Research Institute, 16-1 Onogawa, Tsukuba, Ibaraki, 05-8569, Japan
Format: article
Version: accepted version
Access: embargoed
Persistent link: http://urn.fi/urn:nbn:fi-fe2022041328877
Language: English
Published: Elsevier, 2021
Publish Date: 2023-05-06
Description:

Abstract

New types of Cu-doped spherical-shaped activated carbons were prepared by pyrolysis at 700 °C of chitosan hydrogels impregnated with KOH at ratios (mKOH/mchitosan) ranging from 22.5% to 135%. At KOH impregnation ratio lower than 63%, the precursor Cu doping allowed obtaining bead-shaped activated carbons (diameter ~ 2 mm) and the highest specific surface areas (1145 m² g⁻¹). The absence of copper doping yielded to activated carbon powders whatever the KOH impregnation ratio. As increasing the impregnation ratio higher than 63%, the materials porosity type turns from exclusively microporous to both microporous and mesoporous. The microporous volume, determined by N₂ adsorption at 77 K and CO₂ adsorption at 273 K, attains a maximum (about 0.5 cm³ g⁻¹) for a 63% impregnation ratio. Scanning Electron Microscopy (SEM) images show a multi-scale porosity for a KOH impregnation ratio higher than 45%. Nanoparticles of Cu and CuO were identified by SEM and Transmission Electron Microscopy in the ACs beads prepared from copper-doped chitosan. Whatever the composition, the beads are formed of N-enriched carbons showing mainly pyridinic and pyrrolic groups evidenced by XPS.

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Series: Microporous and mesoporous materials
ISSN: 1387-1811
ISSN-E: 1873-3093
ISSN-L: 1387-1811
Volume: 322
Article number: 111147
DOI: 10.1016/j.micromeso.2021.111147
OADOI: https://oadoi.org/10.1016/j.micromeso.2021.111147
Type of Publication: A1 Journal article – refereed
Field of Science: 116 Chemical sciences
Subjects:
Funding: Hanna Runtti wishes to acknowledge funding from the Walter Ahlström Foundation. Fabrice Guy thanks the French ministry of higher education and research for funding his Ph. D grants.
Copyright information: © 2021 Elsevier. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/.
  https://creativecommons.org/licenses/by-nc-nd/4.0/