Staff View: Novel activated carbon nanofibers composited with cost-effective graphene-based materials for enhanced adsorption performance toward methane

Novel activated carbon nanofibers composited with cost-effective graphene-based materials for enhanced adsorption performance toward methane

Various types of activated carbon nanofibers' (ACNFs) composites have been extensively studied and reported recently due to their extraordinary properties and applications. This study reports the fabrication and assessments of ACNFs incorporated with graphene-based materials, known as gACNFs, v...

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Main Authors:	Othman, F.E.C., Yusof, N., Harun, N.Y., Bilad, M.R., Jaafar, J., Aziz, F., Salleh, W.N., Ismail, A.F.
Format:	Article
Published:	MDPI AG 2020
Online Access:	https://www.scopus.com/inward/record.uri?eid=2-s2.0-85091715976&doi=10.3390%2fPOLYM12092064&partnerID=40&md5=7430301e04f7cc13560f4b1a517b942f http://eprints.utp.edu.my/30011/
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spelling	my.utp.eprints.300112022-03-25T03:17:57Z Novel activated carbon nanofibers composited with cost-effective graphene-based materials for enhanced adsorption performance toward methane Othman, F.E.C. Yusof, N. Harun, N.Y. Bilad, M.R. Jaafar, J. Aziz, F. Salleh, W.N. Ismail, A.F. Various types of activated carbon nanofibers' (ACNFs) composites have been extensively studied and reported recently due to their extraordinary properties and applications. This study reports the fabrication and assessments of ACNFs incorporated with graphene-based materials, known as gACNFs, via simple electrospinning and subsequent physical activation process. TGA analysis proved graphene-derived rice husk ashes (GRHA)/ACNFs possess twice the carbon yield and thermally stable properties compared to other samples. Raman spectra, XRD, and FTIR analyses explained the chemical structures in all resultant gACNFs samples. The SEM and EDX results revealed the average fiber diameters of the gACNFs, ranging from 250 to 400 nm, and the successful incorporation of both GRHA and reduced graphene oxide (rGO) into the ACNFs' structures. The results revealed that ACNFs incorporated with GRHA possesses the highest specific surface area (SSA), of 384 m2/g, with high micropore volume, of 0.1580 cm3/g, which is up to 88 of the total pore volume. The GRHA/ACNF was found to be a better adsorbent for CH4 compared to pristine ACNFs and reduced graphene oxide (rGO/ACNF) as it showed sorption up to 66.40 mmol/g at 25 Â°C and 12 bar. The sorption capacity of the GRHA/ACNF was impressively higher than earlier reported studies on ACNFs and ACNF composites. Interestingly, the CH4 adsorption of all ACNF samples obeyed the pseudo-second-order kinetic model at low pressure (4 bar), indicating the chemisorption behaviors. However, it obeyed the pseudo-first order at higher pressures (8 and 12 bar), indicating the physisorption behaviors. These results correspond to the textural properties that describe that the high adsorption capacity of CH4 at high pressure is mainly dependent upon the specific surface area (SSA), pore size distribution, and the suitable range of pore size. Â© 2020 by the authors. MDPI AG 2020 Article NonPeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-85091715976&doi=10.3390%2fPOLYM12092064&partnerID=40&md5=7430301e04f7cc13560f4b1a517b942f Othman, F.E.C. and Yusof, N. and Harun, N.Y. and Bilad, M.R. and Jaafar, J. and Aziz, F. and Salleh, W.N. and Ismail, A.F. (2020) Novel activated carbon nanofibers composited with cost-effective graphene-based materials for enhanced adsorption performance toward methane. Polymers, 12 (9). http://eprints.utp.edu.my/30011/
institution	Universiti Teknologi Petronas
building	UTP Resource Centre
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Teknologi Petronas
content_source	UTP Institutional Repository
url_provider	http://eprints.utp.edu.my/
description	Various types of activated carbon nanofibers' (ACNFs) composites have been extensively studied and reported recently due to their extraordinary properties and applications. This study reports the fabrication and assessments of ACNFs incorporated with graphene-based materials, known as gACNFs, via simple electrospinning and subsequent physical activation process. TGA analysis proved graphene-derived rice husk ashes (GRHA)/ACNFs possess twice the carbon yield and thermally stable properties compared to other samples. Raman spectra, XRD, and FTIR analyses explained the chemical structures in all resultant gACNFs samples. The SEM and EDX results revealed the average fiber diameters of the gACNFs, ranging from 250 to 400 nm, and the successful incorporation of both GRHA and reduced graphene oxide (rGO) into the ACNFs' structures. The results revealed that ACNFs incorporated with GRHA possesses the highest specific surface area (SSA), of 384 m2/g, with high micropore volume, of 0.1580 cm3/g, which is up to 88 of the total pore volume. The GRHA/ACNF was found to be a better adsorbent for CH4 compared to pristine ACNFs and reduced graphene oxide (rGO/ACNF) as it showed sorption up to 66.40 mmol/g at 25 Â°C and 12 bar. The sorption capacity of the GRHA/ACNF was impressively higher than earlier reported studies on ACNFs and ACNF composites. Interestingly, the CH4 adsorption of all ACNF samples obeyed the pseudo-second-order kinetic model at low pressure (4 bar), indicating the chemisorption behaviors. However, it obeyed the pseudo-first order at higher pressures (8 and 12 bar), indicating the physisorption behaviors. These results correspond to the textural properties that describe that the high adsorption capacity of CH4 at high pressure is mainly dependent upon the specific surface area (SSA), pore size distribution, and the suitable range of pore size. Â© 2020 by the authors.
format	Article
author	Othman, F.E.C. Yusof, N. Harun, N.Y. Bilad, M.R. Jaafar, J. Aziz, F. Salleh, W.N. Ismail, A.F.
spellingShingle	Othman, F.E.C. Yusof, N. Harun, N.Y. Bilad, M.R. Jaafar, J. Aziz, F. Salleh, W.N. Ismail, A.F. Novel activated carbon nanofibers composited with cost-effective graphene-based materials for enhanced adsorption performance toward methane
author_facet	Othman, F.E.C. Yusof, N. Harun, N.Y. Bilad, M.R. Jaafar, J. Aziz, F. Salleh, W.N. Ismail, A.F.
author_sort	Othman, F.E.C.
title	Novel activated carbon nanofibers composited with cost-effective graphene-based materials for enhanced adsorption performance toward methane
title_short	Novel activated carbon nanofibers composited with cost-effective graphene-based materials for enhanced adsorption performance toward methane
title_full	Novel activated carbon nanofibers composited with cost-effective graphene-based materials for enhanced adsorption performance toward methane
title_fullStr	Novel activated carbon nanofibers composited with cost-effective graphene-based materials for enhanced adsorption performance toward methane
title_full_unstemmed	Novel activated carbon nanofibers composited with cost-effective graphene-based materials for enhanced adsorption performance toward methane
title_sort	novel activated carbon nanofibers composited with cost-effective graphene-based materials for enhanced adsorption performance toward methane
publisher	MDPI AG
publishDate	2020
url	https://www.scopus.com/inward/record.uri?eid=2-s2.0-85091715976&doi=10.3390%2fPOLYM12092064&partnerID=40&md5=7430301e04f7cc13560f4b1a517b942f http://eprints.utp.edu.my/30011/
_version_	1738657047205904384
score	13.211869

Novel activated carbon nanofibers composited with cost-effective graphene-based materials for enhanced adsorption performance toward methane

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