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
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Publish Date: | 2023-05-06 |
Description: |
AbstractNew 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. see all
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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/ |