Highly Sensitive Electrochemical Detection of Paraquat in Environmental Water Samples Using a Vertically Ordered Mesoporous Silica Film and a Nanocarbon Composite
文献类型： 外文期刊
作者： Zheng, Weiran 1 ; Su, Ruobing 2 ; Yu, Guoguang 1 ; Liu, Lin 1 ; Yan, Fei 2 ;
作者机构： 1.Zhejiang Acad Agr Sci, Inst Agroprod Safety & Nutr, Hangzhou 310021, Peoples R China
2.Zhejiang Sci Tech Univ, Dept Chem, Key Lab Surface & Interface Sci Polymer Mat Zheji, Hangzhou 310018, Peoples R China
关键词： paraquat; electrochemically reduced graphene oxide; carbon nanotubes; vertically ordered mesoporous silica films; electrochemical detection
期刊名称：NANOMATERIALS （ 影响因子：5.719； 五年影响因子：5.81 ）
ISSN：
年卷期： 2022 年 12 卷 20 期
页码：
收录情况： SCI
摘要： Herein, we demonstrate a sensitive and rapid electrochemical method for the detection of paraquat (PQ) using a glassy carbon electrode (GCE) modified with vertically ordered mesoporous silica films (VMSF) and a nanocarbon composite. The three-dimensional graphene-carbon nanotube (3DG-CNT) nanocarbon composite has a 3D network structure, a large electroactive area and oxygen-containing groups, promoting electron transfer between PQ and the underlying electrode and providing a suitable microenvironment for the stable growth of VMSF. This VMSF/3DG-CNT nanocomposite film could be prepared on the GCE's surface by a two-step electrochemical method with good controllability and convenience. Owing to the synergistic effect of the electrocatalytic ability of 3DG-CNT and the electrostatically enriched capacity of VMSF, the proposed VMSF/3DG-CNT/GCE has superior analytical sensitivity compared with the bare GCE. Furthermore, VMSF has excellent anti-fouling ability that makes the fabricated sensor exhibit satisfactory performance for direct analysis of PQ in environmental water samples.
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