Carbon Dots/α-Fe2O3-Fe3O4 nanocomposite: Efficient synthesis and application as a novel electrochemical aptasensor for the ultrasensitive determination of aflatoxin B1

被引：66
作者：
Huang, Qitong [1 ,2 ]
Lin, Xiaofeng [1 ,2 ]
Chen, Dejian [3 ]
Tong, Qing-Xiao [2 ]
机构：
[1] Gannan Med Univ, Key Lab Biomat & Biofabricat Tissue Engn Jiangxi, Key Lab Prevent & Treatment Cardiovasc & Cerebrov, Sch Med & Informat Engn,Sci Res Ctr,Minist Educ, Ganzhou 341000, Jiangxi, Peoples R China
[2] Shantou Univ, Key Lab Preparat & Applicat Ordered Struct Mat Gu, Dept Chem, Shantou 515063, Guangdong, Peoples R China
[3] Chinese Acad Sci, Xiamen Inst Rare Earth Mat, Haixi Inst, Fuzhou 361021, Fujian, Peoples R China
来源：
FOOD CHEMISTRY | 2022年 / 373卷
基金：
中国国家自然科学基金;
关键词：
Aflatoxin B1; Carbon dots; alpha-Fe2O3; nanoparticle; Fe3O4; Electrochemical aptasensor; GRAPHENE OXIDE; AMPLIFICATION; SENSOR; DOTS; NANOTUBES; ELECTRODE; REMOVAL; ACID;
D O I：
10.1016/j.foodchem.2021.131415
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Developing an effective method for the detection of aflatoxin B1 (AFB1) remains an arduous task due to the high toxicity of AFB1 to a health concern. In this study, a sensitive and reliable electrochemical aptasensor based on carbon dots/alpha-Fe2O3-Fe3O4 nanocomposite (CDs/alpha-Fe2O3-Fe3O4) is constructed for the determination of AFB1. The CDs have good electrical conductivity and large specific surface areas to improve the aptasensor's sensitivity. The alpha-Fe2O3-Fe3O4 can not only improve the catalytic performance of the aptasensor but also have magnetism, which can realize the recovery of CDs/alpha-Fe2O3-Fe3O4 to avoid material waste and environmental pollution. This electrochemical aptasensor can achieve a good linear (0.001-100.0 nM) and excellent detection limit (0.5 pM) for the determination of AFB1. In addition, the aptasensor was also applied to determine AFB1 in beer, rice, and peanuts, all results were in good agreement with HPLC, indicating that the electrochemical aptasensor has a broad application prospect.
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页数：7
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