A novel electrochemical sensor based on Au nanoparticles/8-aminoquinoline functionalized graphene oxide nanocomposite for paraquat detection

被引：22
作者：
Kong, Fen-Ying [1 ]
Li, Rong-Fang [1 ]
Yao, Lei [1 ]
Wang, Zhong-Xia [1 ]
Li, Heng-Ye [1 ]
Wang, Wen-Juan [1 ]
Wang, Wei [1 ]
机构：
[1] Yancheng Inst Technol, Sch Chem & Chem Engn, Yancheng 224051, Peoples R China
来源：
NANOTECHNOLOGY | 2019年 / 30卷 / 28期
基金：
中国国家自然科学基金;
关键词：
graphene oxide; 8-aminoquinoline; Au nanoparticles; paraquat; electrochemical sensors; GLASSY-CARBON ELECTRODE; SQUARE-WAVE VOLTAMMETRY; ON SENSOR; NANOPARTICLES; FABRICATION; WATER; GOLD; FILMS; NANOTUBES; DIQUAT;
D O I：
10.1088/1361-6528/ab10ac
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
In this paper, a novel electrochemical sensor based on Au nanoparticles/8-aminoquinoline functionalized graphene oxide (AuNPs/GAQ) nanocomposite was developed and tested for the first time for detection of paraquat (PQ). The morphology and composition of AuNPs/GAQ nanocomposite were characterized by various techniques, including transmission electron microscopy, Fourier transform infrared spectroscopy, Raman spectroscopy, and x-ray photoelectron spectroscopy. Cyclic voltammetry and differential pulse voltammetry were utilized to investigate the electrochemical performances of AuNPs/GAQ nanocomposite modified glassy carbon electrode. The obtained modified electrode exhibited excellent electrocatalytic activity towards detection of PQ. Under the optimized conditions, the proposed sensor showed low detection limit (6 nM, S/N = 3), wide linear range (0.02-24 mu M), high selectivity and good stability. In addition, it was successfully applied for detection of PQ in natural water samples with satisfactory results.
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页数：9
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