Affiliation:
1. Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun Jilin 130022 China
2. School of Applied Chemistry and Engineering University of Science and Technology of China Hefei Anhui 230026 China
3. Research Center for Analytical Science College of Chemistry Nankai University Tianjin 300071 China
4. Department of Radiology China‐Japan Union Hospital of Jilin University Changchun Jilin 130000 China
Abstract
AbstractImproving reaction selectivity is the next target for nanozymes to mimic natural enzymes. Currently, the majority of strategies in this field are exclusively applicable to metal‐organic‐based or organic‐based nanozymes, while limited in regulating metal oxide‐based semiconductor nanozymes. Herein, taking semiconductor Co3O4 as an example, a heterojunction strategy to precisely regulate nanozyme selectivity by simultaneously regulating three vital factors including band structure, metal valence state, and oxygen vacancy content is proposed. After introducing MnO2 to form Z‐scheme heterojunctions with Co3O4 nanoparticles, the catalase (CAT)‐like and peroxidase (POD)‐like activities of Co3O4 can be precisely regulated since the introduction of MnO2 affects the position of the conduction bands, preserves Co in a higher oxidation state (Co3+), and increases oxygen vacancy content, enabling Co3O4‐MnO2 exhibit improved CAT‐like activity and reduced POD‐like activity. This study proposes a strategy for improving reaction selectivity of Co3O4, which contributes to the development of metal oxide‐based semiconductor nanozymes.
Funder
National Key Research and Development Program of China
National Science Fund for Distinguished Young Scholars
National Natural Science Foundation of China
Cited by
2 articles.
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