Electrochemical synthesis of reduced graphene oxide/gold nanoparticles in a single step for carbaryl detection in water

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dc.contributor.authorAlbalawi, Ibtihaj
dc.contributor.authorAlatawi, Hanan
dc.contributor.authorAlsefri, Samia
dc.contributor.authorMoore, Eric
dc.contributor.funderSaudi Ministry of Higher Education and Cultural Bureau, Dublinen
dc.date.accessioned2023-02-24T12:25:11Z
dc.date.available2023-02-24T12:25:11Z
dc.date.issued2022-07
dc.date.updated2023-02-24T12:05:20Z
dc.description.abstractIn this study, an in situ synthesis approach based on electrochemical reduction and ion exchange was employed to detect carbaryl species using a disposable, screen-printed carbon electrode fabricated with nanocomposite materials. Reduced graphene oxide (rGO) was used to create a larger electrode surface and more active sites. Gold nanoparticles (AuNPs,) were incorporated to accelerate electron transfer and enhance sensitivity. A cation exchange Nafion polymer was used to enable the adhesion of rGO and AuNPs to the electrode surface and speed up ion exchange. Cyclic voltammetry (CV), energy dispersive X-ray spectroscopy (EDX), X-ray photoelectron spectroscopy (XPS), electrical impedance spectroscopy (EIS), atomic force microscopy (AFM) and scanning electron microscopy (SEM) were performed to study the electrochemical and physical properties of the modified sensor. In the presence of differential pulse voltammetry (DPV), an rGO/AuNP/Nafion-modified electrode was effectively used to measure the carbaryl concentration in river and tap water samples. The developed sensor exhibited superior electrochemical performance in terms of reproducibility, stability, efficiency and selectivity for carbaryl detection with a detection limit of 0.2 mu M and a concentration range between 0.5 mu M and 250 mu M. The proposed approach was compared to capillary electrophoresis with ultraviolet detection (CE-UV).en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.articleid5251en
dc.identifier.citationAlbalawi, I., Alatawi, H., Alsefri, S. and Moore, E. (2022) ‘Electrochemical synthesis of reduced graphene oxide/gold nanoparticles in a single step for carbaryl detection in water’, Sensors, 22(14), 5251 (18pp). doi: 10.3390/s22145251en
dc.identifier.doi10.3390/s22145251en
dc.identifier.endpage18en
dc.identifier.issn1424-8220
dc.identifier.issued14en
dc.identifier.journaltitleSensorsen
dc.identifier.startpage1en
dc.identifier.urihttps://hdl.handle.net/10468/14242
dc.identifier.volume22en
dc.language.isoenen
dc.publisherMDPIen
dc.rights© 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/)en
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en
dc.subjectPrinted carbon electrodesen
dc.subjectVoltammetric detectionen
dc.subjectCarbamate pesticidesen
dc.subjectGold nanoparticlesen
dc.subjectCarbofuranen
dc.subjectSensoren
dc.subjectRegioselectivityen
dc.subjectNanocompositeen
dc.subjectPasteen
dc.subjectTriton X-100en
dc.titleElectrochemical synthesis of reduced graphene oxide/gold nanoparticles in a single step for carbaryl detection in wateren
dc.typeArticle (peer-reviewed)en
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