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Hiérarchique bi-continu Pt décoré de l'alliage Au-Sn nanoporeux sur papier en fibre de carbone pour la détection simultanée d'acide ascorbique, de dopamine et d'acide urique.

Dans ce travail, l’alliage AuSn (Pt @ NP-AuSn) nanoporeux modifié sur du papier en fibre de carbone souple tamponné Ni (CFP) est fabriqué par une simple réaction de remplacement dans laquelle NP-AuSn est fabriqué par un alliage contrôlable de Au électrodéposé Films en alliage de Sn. Le Pt @ NP-AuSn / Ni / CFP ainsi préparé présente une structure de pores hiérarchique, une surface spécifique élevée et une excellente activité catalytique. En raison des bi-fonctions de la grande surface de métal nanoporeux et du papier de fibres de carbone macroporeux facilitant le transfert de masse, le Pt @ NP-AuSn / Ni / CFP présente une grande sensibilité pour la détection de l'acide ascorbique (AA), de la dopamine (DA) et acide urique (UA), avec des sensibilités de 0,14muAmuM (-1) cm (-2), 15,23muAmuM (-1) cm (-2), 0,28muAmuM (-1) cm (-2) sous une concentration allant de 200 à 2000 μm, 1-10 μm et 25 à 800 μm pour AA, DA et UA, respectivement. De plus, le Pt @ NP-AuSn / Ni / CFP possède une stabilité à long terme de la détection des AA, DA et UA et présente une grande anti-ingérence vis-à-vis d'une variété de composés courants dans les fluides corporels. Tous ces résultats démontrent que Pt @ NP-AuSn / Ni / CFP peut être un candidat prometteur pour l’application du capteur électrochimique à la détection simultanée de AA, DA et UA.


Source: https://www.ncbi.nlm.nih.gov/pubmed/30388561


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