Ultrasensitive determination of diquat using a novel nanohybrid sensor based on Super-P nanoparticles dispersed palygorskite nanofibers

文献类型： 外文期刊

第一作者： Li, Dongdong

作者： Li, Dongdong;Bai, Lianyang;Li, Dongdong;Bai, Lianyang;Li, Dongdong;Zhao, Hongyuan;Wang, Guoquan;Liu, Runqiang;Rinklebe, Jorg;Rinklebe, Jorg;Lam, Su Shiung

作者机构：

关键词： Ultrasonic-assisted fabrication; Palygorskite; Super-P nanoparticles; Diquat determination; Synergistic effect

期刊名称：SENSORS AND ACTUATORS B-CHEMICAL （ 影响因子：9.221； 五年影响因子：7.676 ）

ISSN：

年卷期： 2022 年 367 卷

页码：

收录情况： SCI

摘要： The excessive diquat (DQ) residue poses a serious hazard to the ecological environment and human health. Herein, a simple, low-cost, and scalable ultrasonication-assisted strategy was proposed to fabricate the composite of Super-P carbon black nanoparticles dispersed palygorskite (Pal) nanofiber, which was employed to construct an electrochemical sensor for DQ determination. The Pal/Super-P/GCE sensor exhibited ultrasensitive determination performance with a low detection limit (0.1514 nM) and high sensitivity (44.141 mu A mu M-1) in the linear DQ concentration range of 0.00050-1.0 mu M. The recoveries of the constructed sensor ranged from 95.6 % to 100.3 % when applied to detect DQ in river water, potato, and cucumber. The above enhanced DQ detection performance was primarily due to the synergistic effect of Pal and Super-P. Pal with high adsorption ability and excellent biocompatibility could provide numerous attachment sites for DQ adsorption due to the superior ion exchange property and plentiful Si-OH on its surface. Super-P with pearl-chain like structure contributed to forming an interconnected conductive network, thus facilitating the homogeneous dispersion of Pal and compensated for the poor conductivity of Pal. This study provides a valuable reference in developing clay-based nanocomposite via ultrasonication-assisted strategy to achieve the application of electrochemical sensor at the ultra-trace levels detection of pesticides.

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