Electrospun composites made of reduced graphene oxide and polyacrylonitrile-based activated carbon nanofibers (rGO/ACNF) for enhanced CO2 adsorption

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dc.contributor.author Othman, Faten Ermala Che
dc.contributor.author Yusof, Norhaniza
dc.contributor.author González Benito, Francisco Javier
dc.contributor.author Fan, Xiaolei
dc.contributor.author Ismail, Ahmad Fauzi
dc.date.accessioned 2021-06-23T10:20:22Z
dc.date.available 2021-06-23T10:20:22Z
dc.date.issued 2020-09-17
dc.identifier.bibliographicCitation Polymers12(9), 2117, Sept. 2020, 19 pp.
dc.identifier.issn 2073-4360
dc.identifier.uri http://hdl.handle.net/10016/32918
dc.description.abstract In this work, we report the preparation of polyacrylonitrile (PAN)-based activated carbon nanofibers composited with different concentrations of reduced graphene oxide (rGO/ACNF) (1%, 5%, and 10% relative to PAN weight) by a simple electrospinning method. The electrospun nanofibers (NFs) were carbonized and physically activated to obtain activated carbon nanofibers (ACNFs). Texture, surface and elemental properties of the pristine ACNFs and composites were characterized using various techniques. In comparison to pristine ACNF, the incorporation of rGO led to changes in surface and textural characteristics such as specific surface area (SBET), total pore volume (Vtotal), and micropore volume (Vmicro) of 373 m2/g, 0.22 cm3/g, and 0.15 cm3/g, respectively, which is much higher than the pristine ACNFs (e.g., SBET = 139 m2/g). The structural and morphological properties of the pristine ACNFs and their composites were studied by Raman spectroscopy and X-ray diffraction (XRD), and field emission scanning electron microscopy (FE-SEM) respectively. Carbon dioxide (CO2) adsorption on the pristine ACNFs and rGO/ACNF composites was evaluated at different pressures (5, 10, and 15 bars) based on static volumetric adsorption. At 15 bar, the composite with 10% of rGO (rGO/ACNF0.1) that had the highest SBET, Vtotal, and Vmicro, as confirmed with BET model, exhibited the highest CO2 uptake of 58 mmol/g. These results point out that both surface and texture have a strong influence on the performance of CO2 adsorption. Interestingly, at p < 10 bar, the adsorption process of CO2 was found to be quite well fitted by pseudo-second order model (i.e., the chemisorption), whilst at 15 bar, physisorption prevailed, which was explained by the pseudo-first order model.
dc.description.sponsorship This research was funded by Malaysian Ministry Education and Universiti Teknologi Malaysia under UTM Prototype Research grant (UTMPR) (Q.J130000.2851.00L41), Collaborative Research Grant (CRG) (Q.J130000.2451.07G72), UTM-TDR grant scheme (Q.J130000.3551.06G07), HICOE research grant (R.J090301.7851.4J428), UTM award grant (R.J130000.7351.5M002), and UTM Shine grant (Q.J130000.2451.09G21).
dc.format.extent 19
dc.language.iso eng
dc.publisher MDPI
dc.rights © 2020 by the authors. Licensee MDPI, Basel, Switzerland.
dc.rights This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license
dc.rights Atribución 3.0 España
dc.rights.uri http://creativecommons.org/licenses/by/3.0/es/
dc.subject.other Activated carbon nanofibers (ACNF)
dc.subject.other Reduced graphene oxide (RGO)
dc.subject.other RGO/ACNF composite
dc.subject.other CO₂ capture
dc.subject.other Electrospinning
dc.title Electrospun composites made of reduced graphene oxide and polyacrylonitrile-based activated carbon nanofibers (rGO/ACNF) for enhanced CO2 adsorption
dc.type article
dc.subject.eciencia Materiales
dc.identifier.doi https://doi.org/10.3390/POLYM12092117
dc.rights.accessRights openAccess
dc.type.version publishedVersion
dc.identifier.publicationfirstpage 1
dc.identifier.publicationissue 9, 2117
dc.identifier.publicationlastpage 19
dc.identifier.publicationtitle Polymers
dc.identifier.publicationvolume 12
dc.identifier.uxxi AR/0000027501
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