Synthesis and characterization of graphene oxide (GO) for the removal of lead ions in water

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dc.contributor.authorMokoena, L. S.
dc.contributor.authorMofokeng, J. P.
dc.date.accessioned2024-08-16T14:15:16Z
dc.date.available2024-08-16T14:15:16Z
dc.date.issued2024
dc.description.abstractThe synthesis and characterization of graphene oxide (GO) for water related applications has become an increasing area of research. GO was prepared via Hummer's method, and analysed for structure, morphology, thermal stability, and the ability to remove heavy lead ions from solution. In FTIR analyses, hydroxyl, carboxyl and ester groups were found to be on the structure of GO. XRD showed the interlayer spacing to have increased from graphite to graphene oxide, whereby the average crystallite size of GO was 16.13. Then SEM confirmed the morphology of GO to be exfoliated and wrinkled, with stacked layers. In TGA, EG degraded in a single step, while GO degraded in three distinct steps. When using AAS to analyse the Pb (II) ion intake properties of GO, it showed a maximum adsorption of 98.1% for 600 ppm lead ion solution. The Freundlich isotherm model was consistent with this adsorption, meaning that adsorption took place on a heterogenous surface, on a multilayer basis. The value of n for this isotherm was 0.1474, implying a dominant chemical adsorption. A significant contribution was done to the structure of GO, with its metal adsorption properties clearly portrayed.
dc.description.versionPublisher's version
dc.identifier.citationMokoena, L. S., & Mofokeng, J. P. (2024). Synthesis and characterization of graphene oxide (GO) for the removal of lead ions in water. Carbon Trends, 15(2024), 100339. https://doi.org/10.1016/j.cartre.2024.100339
dc.identifier.issn2667-0569 (online)
dc.identifier.urihttps://doi.org/10.1016/j.cartre.2024.100339
dc.identifier.urihttp://hdl.handle.net/11660/12737
dc.language.isoen
dc.publisherElsevier
dc.rights.holderAuthor(s)
dc.rights.licensehttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectGraphene oxide
dc.subjectexpandable graphite
dc.subjectmorphology
dc.subjectadsorption
dc.subjectIsotherm modelling
dc.titleSynthesis and characterization of graphene oxide (GO) for the removal of lead ions in water
dc.typeArticle
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