Iron nanoparticle/carbon nanotube composite as oxidase-like nanozyme for visual analysis of total antioxidant capacity

被引:0
|
作者
Liu, Junlin [1 ]
Xie, Sophia [2 ]
Wang, Nan [3 ]
Sun, Zhongyue [1 ]
Tang, Lina [1 ]
Zhang, Guo-jun [1 ]
Tressel, John [4 ]
Zhang, Yulin [1 ,5 ]
Sun, Yujie [1 ]
Chen, Shaowei [4 ]
机构
[1] Hubei Univ Chinese Med, Sch Lab Med, Hubei Shizhen Lab, Wuhan 430065, Peoples R China
[2] Wuhan Britain China Sch, Wuhan 430033, Peoples R China
[3] Jinan Univ, Dept Phys, Guangzhou 510632, Peoples R China
[4] Univ Calif Santa Cruz, Dept Chem & Biochem, Santa Cruz, CA 95060 USA
[5] Hubei Univ Chinese Med, Sch Pharm, Hubei Key Lab Resources & Chem Chinese Med, Wuhan 430065, Peoples R China
来源
FOOD CHEMISTRY-X | 2025年 / 25卷
基金
美国国家科学基金会;
关键词
Carbon nanotube; Iron nanoparticle; Oxidase; Nanozyme; Total antioxidant capacity; Fluorescence; Smartphone;
D O I
10.1016/j.fochx.2024.102093
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Total antioxidant capacity (TAC) is an important indicator for assessing the merit of natural plants and foods. Herein, a visual TAC assay is developed based on the oxidase-like activity of nitrogen-doped carbon nanotubes loaded with Fe nanoparticles (FeNPs@NCNT), which is prepared via high-temperature pyrolysis of metal-organic framework precursors and can catalyze the oxidation of colorless o-phenylenediamine (OPD) to colored 2,3-diaminophenazine (DAP). The addition of antioxidants (e.g., quercetin) impedes the formation of DAP, diminishing the color change, which can be analyzed via the RGB values obtained with a smartphone color-recognition APP, "Color Picker". The change of the optical signal can also be analyzed in the fluorescence mode. These two detection modes yield consistent TAC analysis of actual plant samples, in accord with results from the standard ABTS method. Results from this study highlight the unique potential of nanozymes in the development of effective TAC analysis platforms for natural plants and food.
引用
收藏
页数:10
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