1. Cu-chelated polydopamine nanozymes with laccase-like activity for photothermal catalytic degradation of dyes.
- Author
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Wang P, Chen R, Jia Y, Xu Y, Bai S, Li H, and Li J
- Subjects
- Catalysis, Particle Size, Surface Properties, Chlorophenols chemistry, Chlorophenols metabolism, Methylene Blue chemistry, Methylene Blue metabolism, Rosaniline Dyes, Copper chemistry, Indoles chemistry, Coloring Agents chemistry, Laccase chemistry, Laccase metabolism, Polymers chemistry
- Abstract
The industrial applications of enzymes are usually hindered by the high production cost, intricate reusability, and low stability in terms of thermal, pH, salt, and storage. Therefore, the de novo design of nanozymes that possess the enzyme mimicking biocatalytic functions sheds new light on this field. Here, we propose a facile one-pot synthesis approach to construct Cu-chelated polydopamine nanozymes (PDA-Cu NPs) that can not only catalyze the chromogenic reaction of 2,4-dichlorophenol (2,4-DP) and 4-aminoantipyrine (4-AP), but also present enhanced photothermal catalytic degradation for typical textile dyes. Compared with natural laccase, the designed mimic has higher affinity to the substrate of 2,4-DP with K
m of 0.13 mM. Interestingly, PDA-Cu nanoparticles are stable under extreme conditions (temperature, ionic strength, storage), are reusable for 6 cycles with 97 % activity, and exhibit superior substrate universality. Furthermore, PDA-Cu nanozymes show a remarkable acceleration of the catalytic degradation of dyes, malachite green (MG) and methylene blue (MB), under near-infrared (NIR) laser irradiation. These findings offer a promising paradigm on developing novel nanozymes for biomedicine, catalysis, and environmental engineering., Competing Interests: Declaration of competing interest The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: [Junbai Li reports financial support was provided by National Natural Science Foundation of China. Yi Jia reports financial support was provided by National Natural Science Foundation of China. Yi Jia reports financial support was provided by National Key Research and Development Program of China]., (Copyright © 2024 Elsevier Inc. All rights reserved.)- Published
- 2024
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