材料科学
检出限
电化学气体传感器
结垢
电化学
介电谱
化学工程
线性范围
重复性
纳米技术
赭曲霉毒素A
电极
色谱法
膜
生物
真菌毒素
工程类
物理化学
植物
遗传学
化学
作者
Hao Huang,Dan Wang,Ying Zhou,Dongping Wu,Xiaoning Liao,Wan‐Ming Xiong,Juan Du,Yanping Hong
出处
期刊:Nanotechnology
[IOP Publishing]
日期:2021-08-03
卷期号:32 (45): 455501-455501
被引量:14
标识
DOI:10.1088/1361-6528/ac1a42
摘要
Electrochemical sensor has great potential in the detection of small molecules by virtues of low cost, fast response, and easy to miniaturization. However, electrochemical sensing of ochratoxin A (OTA) was seriously hindered by the heavy electrode-fouling effect and poor electrochemical activity inherent from OTA molecular. Herein, two-dimensional titanium carbide (2D Ti3C2) MXene incorporated with carboxylic multiwalled carbon nanotubes (cMWCNTs) was developed as a glassy carbon electrode modifier for rapid and sensitive detection of OTA. Physical characterizations combined with electrochemical techniques revealed that cMWCNTs can not only prevent the restacking of 2D Ti3C2nanosheets but also facile its electron transfer, leading to a nanohybrid with a high specific surface and good electrocatalytic activity to OTA. Under optimal conditions, the electrochemical sensor showed a good linear response to OTA in a concentration range from 0.09 to 10μmol·l-1and a low detection limit (LOD) of 0.028μmol·l-1. The proposed sensor was impelled successive times to detect OTA, a good repeatability was obtained, indicating the constructed sensor possessed good anti-fouling property. Moreover, satisfactory recoveries between 91.8% and 103.2% were obtained in the real sample analysis of grape and beer, showing that the developed sensing technique is reliable for the screening of trace OTA in food resources.
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