ZnO−Co3O4 Nanofibers/MXene Composite with Peroxidase-Like Activity for Ascorbic Acid Detection.
The 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 p...
| Autores: | , , , |
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| Tipo de documento: | artigo |
| Estado: | Versão publicada |
| Data de publicação: | 2025 |
| País: | Brasil |
| Recursos: | Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
| Repositório: | Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
| Idioma: | inglês |
| OAI Identifier: | oai:www.alice.cnptia.embrapa.br:doc/1176598 |
| Acesso em linha: | http://www.alice.cnptia.embrapa.br/alice/handle/doc/1176598 https://doi.org/10.1021/acsanm.4c00539 |
| Access Level: | Acceso aberto |
| Palavra-chave: | Nanozyme Colorimetric sensor Peroxidase-mimetic activity Titanium carbide MXene Electrospun nanofibers |
| Resumo: | The 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. |
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