期刊
ANALYTICAL CHEMISTRY
卷 92, 期 7, 页码 5152-5157出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.analchem.9b05645
关键词
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资金
- National Natural Science Foundations of China [21675099]
- Major Basic Research Program of Natural Science Foundation of Shandong Province [ZR2018ZC0129]
- Special Fund for Postdoctoral Innovation Projects of Shandong Province [201903045]
- Key R&D Plan of Jining City [2018HMNS001]
- Shandong, P. R. China
A facile and efficient plasma treatment strategy has been applied for the first time to dope heteroatom nitrogen (N) into Q-graphene (QG) under ambient temperature toward a carbon-based green nanozyme. It was discovered that the resulting N doped QG (N-QG) nanozyme can present the greatly enhanced catalysis activity, which is nearly 5-fold higher than that of pristine QG, as comparably revealed by the kinetic studies. Herein, the plasma treatment-assisted N doping could improve the conductivity (hydrophilicity) and create the surface defects of QG so as to promote the electron transferring toward the enhanced catalytic activities of N-QG. Furthermore, the catalase, superoxide explored, indicating the N doping could endow the obtained nanozyme with a high specificity of peroxidase-like catalysis. The application feasibility of the developed N-QG nanozyme was demonstrated subsequently by the catalysis-based colorimetric assays for H2O2 in milk samples, with the linear range from 2.00 to 1500 mu M. Importantly, such a plasma-assisted heteroatom doping route may open a door toward the large-scale applications for the rational designs of various enzyme mimics with improved catalysis performances.
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