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A Highly Efficient ZrO 2 Nanoparticle Based Electrochemical Sensor for the Detection of Organophosphorus Pesticides
Author(s) -
Wang Haibo,
Su Yingchun,
Kim Hojong,
Yong Daming,
Wang Lei,
Han Xiaojun
Publication year - 2015
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.201500460
Subject(s) - chemistry , detection limit , omethoate , nanoparticle , electrochemistry , selectivity , electrode , electrochemical gas sensor , scanning electron microscope , nuclear chemistry , chemical engineering , chromatography , organic chemistry , pesticide , materials science , composite material , agronomy , biology , engineering , catalysis
A sensitive electrochemical method for square‐wave voltammetric detection of organophosphate (OP) compounds was developed based on zirconia (ZrO 2 ) nanoparticles modified electrode. The electrode was fabricated using electrochemical deposition and characterized by scanning electron microscopy (SEM), which confirmed the successful formation of nanoparticles. Due to the strong affinity of ZrO 2 with the phosphoric group, nitroaromatic OPs can strongly bind to the surface of ZrO 2 nanoparticles (ZrO 2 NPs). Under optimized operational conditions, SWV was employed for Omethoate (a model of OP compounds) detection with 5 min absorption, which showed a wide detection range from 98.5 pmol·L −1 to 985 nmol·L −1 , with a detection limit as low as 52.5 pmol·L −1 . This electrochemical sensor has good selectivity, stability and reproducibility, and great potential in the detection of OP compounds in agriculture area.