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Synthesis of "(aminomethyl)phosphonic acid-functionalized graphene oxide", and comparison of its adsorption properties for thorium(IV) ion, with plain graphene oxide
, Article Radiochimica Acta ; 2021 ; 00338230 (ISSN) ; Outokesh, M ; Ahmadi, S.J ; Zahakifar, F ; Sharif University of Technology
De Gruyter Open Ltd
2021
Abstract
The current study presents a simple and scalable method for the synthesis of (aminomethyl)phosphonic acid-functionalized graphene oxide (AMPA-GO) adsorbent. The chemical structure of the new material was disclosed by different instrumental analyses (e.g. FTIR, Raman, XPS, AFM, TEM, XRD, CHN, and UV), and two pertinent mechanisms namely nucleophilic substitution and condensation were suggested for its formation. Adsorption experiments revealed that both AMPA-GO and plain GO have a high affinity toward Th(IV) ions, but the AMPA-GO is superior in terms of adsorption capacity, rate of adsorption, selectivity, pH effect, etc. Indeed, the AMPA-GO can uptake Th(IV) nearly instantaneously, and...
Synthesis of "(aminomethyl)phosphonic acid-functionalized graphene oxide", and comparison of its adsorption properties for thorium(IV) ion, with plain graphene oxide
, Article Radiochimica Acta ; Volume 110, Issue 1 , 2022 , Pages 37-49 ; 00338230 (ISSN) ; Outokesh, M ; Ahmadi, S. J ; Zahakifar, F ; Sharif University of Technology
De Gruyter Open Ltd
2022
Abstract
The current study presents a simple and scalable method for the synthesis of (aminomethyl)phosphonic acid-functionalized graphene oxide (AMPA-GO) adsorbent. The chemical structure of the new material was disclosed by different instrumental analyses (e.g. FTIR, Raman, XPS, AFM, TEM, XRD, CHN, and UV), and two pertinent mechanisms namely nucleophilic substitution and condensation were suggested for its formation. Adsorption experiments revealed that both AMPA-GO and plain GO have a high affinity toward Th(IV) ions, but the AMPA-GO is superior in terms of adsorption capacity, rate of adsorption, selectivity, pH effect, etc. Indeed, the AMPA-GO can uptake Th(IV) nearly instantaneously, and...