Fe,N-doped Carbon As Peroxidase Mimics for Single-Use Colorimetric Bioassays
Journal of Materials Science(2021)
摘要
Nanozymes as promising alternatives to natural enzymes have attracted enormous attentions for their high robustness, low cost, and tunable activity. Among various candidates, carbonaceous nanomaterials possess extra advantage features of designable surface properties and good biocompatibility. However, their peroxidase-like activity is typically moderate owing to the short half-life of radical hydroxyl (·OH), the poor catalytic activity and substrate affinity. Herein, we synthesize Fe,N-doped carbon (Fe,N-C-800) via pyrolyzing Fe-doped ZIF-8 (ZnFe-ZIF) in NH3 at 800 °C. Fe,N-C-800 shows excellent peroxidase mimic with outstanding substrate affinity and catalytic velocity superior to the advanced Fe single-atom catalyst. The excellent enzyme-like performance is ascribed to the synergistic contributions of Fe- and N-doping. Fe functions as catalytic center while pyrrolic N absorbs TMB (3,3’,5,5’-Tetramethylbenzidine) substrate and enhances the electron density of Fe sites, thereby shortening the migration distance of ·OH and further improving the catalytic activity. Based on Fe,N-C-800, disposable paper bioassays are fabricated and exhibit ultrasensitive detection of H2O2.
更多查看译文
关键词
Nanozymes,Nanoparticles
AI 理解论文
溯源树
样例
![](https://originalfileserver.aminer.cn/sys/aminer/pubs/mrt_preview.jpeg)
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要