ZnO−Co3O4 Nanofibers/MXene Composite with Peroxidase-Like Activity for Ascorbic Acid Detection.

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dc.contributorFEDERAL UNIVERSITY OF SAO CARLOS; INSTITUTE OF CHEMISTRY, FEDERAL UNIVERSITY OF BAHIA (UFBA); DEPARTMENT OF MATERIALS SCIENCE AND ENGINEERING, DREXEL UNIVERSITY; DANIEL SOUZA CORREA, CNPDIA.
dc.creatorFACURE, M. H. M.
dc.creatorMERCANTE, L. A.
dc.creatorGOGOTSI, Y.
dc.creatorCORREA, D. S.
dc.date2025-06-13T14:47:40Z
dc.date2025-06-13T14:47:40Z
dc.date2025-06-13
dc.date2025
dc.date.accessioned2026-07-07T04:29:50Z
dc.descriptionThe growing concern about nutrient-rich diets and health monitoring has motivated the search for simple, fast, and effective methods for detecting important nutrients in foodstuffs. In this scenario, colorimetric detection using nanostructures presenting enzymatic properties (nanozymes) has gained prominence due to its experimental simplicity and low cost. In this work, zinc oxide−cobalt oxide electrospun nanofibers (ZnO−Co3O4 NFs) were combined with titanium carbide (Ti3C2Tx) MXene for the colorimetric detection of ascorbic acid. The nanocomposite (ZnO−Co3O4 NFs/Ti3C2Tx) presented peroxidase-like activity with a high affinity for the chromogenic substrate 3,3,5,5- tetramethylbenzidine and fast reaction kinetics. Taking advantage of the catalytic properties of the developed nanocomposite, ascorbic acid was detected with high sensitivity (the limit of detection was 0.58 μmol L−1 ) and selectivity, even in the presence of common interferents. The colorimetric sensor even detected ascorbic acid in orange juice, revealing its potential to be used as a reliable and sensitive portable method for food analysis.
dc.format4291−4299
dc.identifierACS Applied Nano Materials, v. 8, 2025.
dc.identifierhttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1176598
dc.identifierhttps://doi.org/10.1021/acsanm.4c00539
dc.identifier.urihttp://hdl.handle.net/123456789/463176
dc.languageeng
dc.rightsopenAccess
dc.subjectNanozyme
dc.subjectColorimetric sensor
dc.subjectPeroxidase-mimetic activity
dc.subjectTitanium carbide
dc.subjectMXene
dc.subjectElectrospun nanofibers
dc.titleZnO−Co3O4 Nanofibers/MXene Composite with Peroxidase-Like Activity for Ascorbic Acid Detection.
dc.typeArtigo de periódico

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