Affiliation:
1. Guangxi Key Laboratory of Electrochemical and Magneto‐chemical Functional Materials College of chemistry and bioengineering Guilin University of Technology Guilin 541006 China
2. State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences 5625 Renmin Street Changchun Jilin 130022 China
3. School of Applied Chemistry and Engineering University of Science and Technology of China Hefei Anhui 230026 China
4. Yanshan Branch of Beijing Chemical Research Institute Sinopec Beijing 102500 China
Abstract
AbstractThe growing demand for highly active nanozymes in various fields has led to the development of several strategies to enhance their activity. Plasmonic enhancement, a strategy used in heterogenous catalysis, represents a promising strategy to boost the activity of nanozymes. Herein, Pd‐Au heteromeric nanoparticles (Pd‐Au dimers) with well‐defined heterointerfaces have been explored as plasmonic nanozymes. As a model system, the Pd‐Au dimers with integrated peroxidase (POD)‐like activity and plasmonic activity are used to investigate the effect of plasmons on enhancing the activity of nanozymes under visible light irradiation. Mechanistic studies revealed that the generation of hot electron‐hole pairs plays a dominant role in plasmonic effect, and it greatly enhances the decomposition of H2O2 to the reactive oxygen species (ROS) intermediates (•OH, •O2− and 1O2), leading to elevated POD‐like activity of the Pd‐Au dimers. Finally, the Pd‐Au dimers are applied in the plasmon‐enhanced colorimetric method for the detection of alkaline phosphatase, exhibiting broad linear range and low detection limit. This study not only provides a straightforward approach for regulating nanozyme activity through plasmonic heterostructures but also sheds light on the mechanism of plasmon‐enhanced catalysis of nanozymes.
Funder
Natural Science Foundation of Guangxi Province
National Natural Science Foundation of China
Subject
Biomaterials,Biotechnology,General Materials Science,General Chemistry
Cited by
16 articles.
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