A high oxidase-like activity, bimetallic single-atom nanozyme FeCe/NC prepared by FeCe-ZIF-8 approach for sensing tannic acid in tea

被引:6
|
作者
Zhu, Xingyu [1 ]
Chen, Chong [1 ]
Che, Dou [1 ]
Yan, Hui [1 ]
机构
[1] Jiangsu Univ Sci & Technol, Sch Biotechnol, Zhenjiang 212100, Peoples R China
来源
FOOD CHEMISTRY-X | 2024年 / 23卷
关键词
Single -atom nanozymes; Oxidase-like; Bimetallic nanozymes; FeCe/NC; Tannic acid; Biosensor; PEROXIDASE-LIKE ACTIVITY; OXYGEN REDUCTION; ELECTROCATALYSTS; CATALYSTS; CARBON;
D O I
10.1016/j.fochx.2024.101552
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
To improve the activity of single-atom nanozymes (SAzymes) for applications in food analysis, a new bimetal SAzyme FeCe/NC was developed. Its oxidase-like activity is 40% higher than that of single metal SAzyme Fe/NC. Based on a series of characterization investigations, the catalytic mechanism is that it directly catalyzed O2 to generate center dot OH, O2 center dot-and 1O2. It could directly catalyze oxidation 3,3 ',5,5 '-tetramethylbenzidine (TMB) to blue oxTMB, thereunder, a FeCe/NC SAzyme-TMB colorimetric method for the detection of tannic acid (TA) was constructed after the optimization of catalytic conditions. The method has a high R2 of 0.995, a low limit of detection (LOD) of 0.26 mu mol/L, and high stability. The detection performance was validated by the real samples (tea). Therefore, the prepared bimetallic SAzyme FeCe/NC can be applied for TA detection without the addition of H2O2, and will have broad applications in the areas of food, feed, and life science.
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页数:9
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