Fabrication of a sensitive electrochemical sensor based on Ag nanoparticles and alizarin yellow polymer: Application to
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pISSN: 0256-1115 eISSN: 1975-7220
INVITED REVIEW PAPER
INVITED REVIEW PAPER
Fabrication of a sensitive electrochemical sensor based on Ag nanoparticles and alizarin yellow polymer: Application to the detection of an environmental pollutant thiourea Iraj Jodan*, Kitirote Wantalla**, Nader Amini*, Behzad Shahmoradi*,†, Mona Ghaslani*, Seung-Mok Lee***,†, Jixiang Yang****, and Shivaraju Harikaranahalli Puttaiah***** *Department of Environmental Health Engineering, Environmental Health Research Center, Research Institute for Health Development, Kurdistan University of Medical Sciences, Sanandaj, Iran **Department of Chemical Engineering, Faculty of Engineering, Khon Kaen University, Khon Kaen 40002, Thailand ***Department of Environmental Engineering, Catholic Kwandong University, Gangneung 210701, Korea ****Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, China *****Department of Water and Health, JSS Academy of Higher Education and Research, Mysuru-570015, India (Received 2 March 2020 • Revised 2 April 2020 • Accepted 27 April 2020) AbstractThe harmful and destructive effects of excessive consumption of thiourea in various industries and agriculture have caused health and environmental concerns. Hence, attention has been paid to the need for analysis and detection thiourea at very low concentrations. The aim of this study was to determine the efficiency of electrochemical sensor based on glass carbon electrode modified with Ag nanoparticles and alizarin yellow to detect thiourea as a pollutant. Glass carbon electrode was first modified by alizarin yellow polymer and Ag nanoparticles through electropolymerization and chronoamperometry methods, respectively. The characteristics of the modified electrode were determined through FESEM and EDAX analysis and thiourea concentration was measured through cyclic voltammetry (CV) and differential pulse voltammetry (DPV) methods. The results showed that the linear range, limit of detection, and sensitivity were 10 to 940 M, 3.3 M and 0.181 A/M, respectively. The stability and reproducibility of the sensor response as well as the interference effect of some anion species were investigated on the performance of the sensor in determining thiourea. The results indicate the optimum stability and reproducibility and no interference effect of the studied species on efficiency of the sensor in determining thiourea. Keywords: Electrochemical Sensor, Ag Nanoparticles, Alizarin Yellow Polymer, Thiourea
INTRODUCTION Thiourea (TU) is a white crystalline solid of formula CH4N2S whose solubility is about 137 mg/l in water at 20 oC. Other names for this substance are thiocarbamide and sulfourea [1]. It is produced in two forms, natural and synthetic. It has been detected in laburnum shrubs (Laburnum anagyroides) and is a natural metabolite of Verticillium alboatrum and Bortrylius cinerea. It is industrially produced by the reaction between technical-grade calcium cyanamide (CaCN2) and hydrogen sulfide (H2S) or one of its precursors in aqu
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