1. A nanozyme with switchable enzyme-like activity for the logic gates detection of thymol and hydrogen peroxide in honey.
- Author
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Li J, Wang L, Song D, Li Y, and Huang H
- Subjects
- Peroxidase chemistry, Peroxidase metabolism, Copper chemistry, Catechol Oxidase chemistry, Catechol Oxidase metabolism, Logic, Food Contamination analysis, Nanostructures chemistry, Hydrogen Peroxide chemistry, Hydrogen Peroxide analysis, Honey analysis, Thymol analysis, Thymol chemistry
- Abstract
A new nanozyme (CuGaa) with switchable enzyme-like activity of peroxidase and polyphenol oxidase was successfully prepared based on guanidinoacetic acid and copper. The two enzyme-like activities can be easily switched by changing temperature or adding MnCl
2 . At 4 °C, polyphenol oxidase-like activity decreased to nearly 1%, and the material is mainly characterized by peroxidase-like activity at this point. However, at 60 °C in the presence of 20 mM MnCl2 , the peroxidase-like activity decreased to nearly 10%, and the polyphenol oxidase-like activity of the materials increased to 140%. Based on the switchable enzyme-like activity of CuGaa, detection methods for thymol and hydrogen peroxide were developed. In addition, a rapid combination strategy was further established combined with logic gate technology for the facile identification of complex contamination in honey, which provided new ideas for low-cost and rapid honey identification., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 Elsevier B.V. All rights reserved.)- Published
- 2024
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