Extension of BET theory to CO2 adsorption isotherms for ultra-microporosity of covalent organic polymers

Usually, nitrogen and argon adsorption�desorption isotherms are used at their respective boiling points for the determination of specific surface area via the BET theory of microporous materials. However, for ultra-micropores, where nitrogen and argon cannot access at cryogenic temperatures, the C...

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Main Authors: Mukhtar, A., Mellon, N., Saqib, S., Lee, S.-P., Bustam, M.A.
Format: Article
Institution: Universiti Teknologi Petronas
Record Id / ISBN-0: utp-eprints.23253 /
Published: Springer Nature 2020
Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85096140500&doi=10.1007%2fs42452-020-2968-9&partnerID=40&md5=f808294fa5ef668716429abfa6b9a5cc
http://eprints.utp.edu.my/23253/
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spelling utp-eprints.232532021-08-19T07:27:12Z Extension of BET theory to CO2 adsorption isotherms for ultra-microporosity of covalent organic polymers Mukhtar, A. Mellon, N. Saqib, S. Lee, S.-P. Bustam, M.A. Usually, nitrogen and argon adsorption�desorption isotherms are used at their respective boiling points for the determination of specific surface area via the BET theory of microporous materials. However, for ultra-micropores, where nitrogen and argon cannot access at cryogenic temperatures, the CO2 adsorption�desorption isotherms have been considered as alternative options for the determination of specific surface area by extending BET theory, but the surface area determined by using CO2 adsorption�desorption isotherms is not significant due to strong CO2-CO2 interactions. In this study, the microporous covalent organic polymers are subjected to nitrogen and CO2 adsorption�desorption isotherms and the results showed that a clear linear region is available in isotherms, which confirms the presence of ultra-micropores. The surface area determined by the CO2 adsorption�desorption isotherms is higher than the surface area determined by N2 adsorption�desorption isotherms. These results indicate that the microporous covalent organic polymers contain ultra-micropores where only CO2 can reach, while nitrogen and argon cannot access at cryogenic conditions because their kinetic diameter is larger than CO2. © 2020, Springer Nature Switzerland AG. Springer Nature 2020 Article NonPeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-85096140500&doi=10.1007%2fs42452-020-2968-9&partnerID=40&md5=f808294fa5ef668716429abfa6b9a5cc Mukhtar, A. and Mellon, N. and Saqib, S. and Lee, S.-P. and Bustam, M.A. (2020) Extension of BET theory to CO2 adsorption isotherms for ultra-microporosity of covalent organic polymers. SN Applied Sciences, 2 (7). http://eprints.utp.edu.my/23253/
institution Universiti Teknologi Petronas
collection UTP Institutional Repository
description Usually, nitrogen and argon adsorption�desorption isotherms are used at their respective boiling points for the determination of specific surface area via the BET theory of microporous materials. However, for ultra-micropores, where nitrogen and argon cannot access at cryogenic temperatures, the CO2 adsorption�desorption isotherms have been considered as alternative options for the determination of specific surface area by extending BET theory, but the surface area determined by using CO2 adsorption�desorption isotherms is not significant due to strong CO2-CO2 interactions. In this study, the microporous covalent organic polymers are subjected to nitrogen and CO2 adsorption�desorption isotherms and the results showed that a clear linear region is available in isotherms, which confirms the presence of ultra-micropores. The surface area determined by the CO2 adsorption�desorption isotherms is higher than the surface area determined by N2 adsorption�desorption isotherms. These results indicate that the microporous covalent organic polymers contain ultra-micropores where only CO2 can reach, while nitrogen and argon cannot access at cryogenic conditions because their kinetic diameter is larger than CO2. © 2020, Springer Nature Switzerland AG.
format Article
author Mukhtar, A.
Mellon, N.
Saqib, S.
Lee, S.-P.
Bustam, M.A.
spellingShingle Mukhtar, A.
Mellon, N.
Saqib, S.
Lee, S.-P.
Bustam, M.A.
Extension of BET theory to CO2 adsorption isotherms for ultra-microporosity of covalent organic polymers
author_sort Mukhtar, A.
title Extension of BET theory to CO2 adsorption isotherms for ultra-microporosity of covalent organic polymers
title_short Extension of BET theory to CO2 adsorption isotherms for ultra-microporosity of covalent organic polymers
title_full Extension of BET theory to CO2 adsorption isotherms for ultra-microporosity of covalent organic polymers
title_fullStr Extension of BET theory to CO2 adsorption isotherms for ultra-microporosity of covalent organic polymers
title_full_unstemmed Extension of BET theory to CO2 adsorption isotherms for ultra-microporosity of covalent organic polymers
title_sort extension of bet theory to co2 adsorption isotherms for ultra-microporosity of covalent organic polymers
publisher Springer Nature
publishDate 2020
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-85096140500&doi=10.1007%2fs42452-020-2968-9&partnerID=40&md5=f808294fa5ef668716429abfa6b9a5cc
http://eprints.utp.edu.my/23253/
_version_ 1741196646155288576
score 11.62408

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