Desarrollo y evaluación de un sensor portátil para la detección de Hg2+, a través de la síntesis verde de AuNP utilizando extracto acuoso de Sargassum spp.
Resumen
El presente trabajo tiene la finalidad de dar a conocer el desarrollo de un prototipo de sensor para la medición de mercurio (Hg2+) en solución acuosa sobre una plataforma electroquímica basada en electrodos serigrafiados de nanotubos de carbonos (CNT-SPE) en conjunto con nanopartículas de oro (NPs-Au) realizadas a través de síntesis verde, utilizando extracto acuoso de Sargassum spp. Para esto, se realizó la caracterización de las NPs-Au por espectroscopía ultravioleta-visible (UV-Vis), infrarrojo (TF-IR), difracción de rayos X (DRX) y microscopía electrónica de barrido (SEM); obteniendo nanopartículas entre 80-100 nm las cuales poseen un recubrimiento orgánico que les confiere una sinergia al momento de ser conjugadas con CNT-SPE oxidadas/activadas. Posteriormente, las NPs-Au se utilizaron para modificar el CNT-SPE a través del método drop-casting y así ensamblar un novedoso sensor electroquímico para la medición de Hg2+, cuya validación y habilidad para medir fue demostrada utilizando voltametría diferencial de pulso (DPV). Se obtuvieron límites de detección de 2.38 uM y cuantificación de 3 uM. Los resultados demuestran que la plataforma desarrollada es una alternativa rápida, eficiente y portátil para la medición de Hg2+.
Citas
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