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Room-temperature ultrasonic-assisted self-assembled synthesis of silkworm cocoon-like COFs@GCNTs composite for sensitive detection of diuron in food samples

文献类型： 外文期刊

作者： Li, Dongdong 1 ; Zhao, Hongyuan 3 ; Wang, Guoquan 3 ; Liu, Runqiang 3 ; Bai, Lianyang 1 ;

作者机构： 1.Hunan Acad Agr Sci, Hunan Weed Sci Key Lab, Changsha 410125, Peoples R China

2.Hunan Univ, Coll Biol, Longping Branch, Changsha 410125, Peoples R China

3.Henan Inst Sci & Technol, Xinxiang 453003, Peoples R China

关键词： Diuron; Electrochemical sensor; Synergistic effect; Covalent organic frameworks; Graphitized multi -walled carbon nanotubes

期刊名称：FOOD CHEMISTRY （ 影响因子：8.8； 五年影响因子：8.6 ）

ISSN： 0308-8146

年卷期： 2023 年 418 卷

页码：

收录情况： SCI

摘要： Diuron (DU) exhibits good weed control effect but possesses strong hazard to human health, thereby designing a fast and sensitive method to detect DU is highly urgent. Herein, we report the ultrasonic-assisted self-assembly synthesis of porous covalent organic frameworks (COFs) spheres@graphitized multi-walled carbon nanotubes (GCNTs) composite based on 7C-7C conjugation effect at room temperature, which was employed for DU deter-mination. For the COFs@GCNTs composite, COFs with ultrahigh specific surface area shows strong adsorption ability towards DU, whereas GCNTs with favorable conductivity help to form the 3D interconnected conductive network around COFs spheres, thereby effectively compensating for the poor conductivity of COFs. Because of the synergistic effect between COFs and GCNTs, the developed sensor presented a low detection limit of 0.08 mu M in the concentration range of 0.30-18.00 mu M. Moreover, the actual sample analysis in the tomato and cucumber yielded satisfactory recoveries (96.40%-103.20%), proving reliable practicability of the developed sensor.

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