J. Nanoanalysis., 6(1): 48-56, Winter 2019 RESEARCH ARTICLE Electrodeposi ton of anionic, catonic and nonionic surfactants and gold nanopartcles onto glassy carbon electrode for catechol detecton Maryam Nazari 1,3 , Soheila Kashanian 2,3, *, Rezvan Mohammadi 1 1 Faculty of Chemistry, Razi University, Kermanshah, Islamic Republic of Iran 2 Faculty of Chemistry, Sensor and Biosensor Research Center (SBRC) and Nanoscience and Nanotechnology Research Center (NNRC), Razi University, Kermanshah, Islamic Republic of Iran 3 Nano Drug Delivery Research Center, Faculty of Pharmacy, Kermanshah University of Medical Sciences, Kermanshah, Iran Received: 2018-10-01 Accepted: 2018-11-28 Published: 2019-02-01 ABSTRACT Three surfactants were selected to modify glassy carbon electrode including sodium dodecylbenzenesulfonate, Tween 80 and cetyltrimethylammonium bromide. The obtained nano- Au/surfactant/GCEs were characterized with scanning electron microscopy and electrochemical techniques. Electrochemical behavior of catechol at the nano-Au/surfactant/GCE was thoroughly investgated for modifed electrodes. Compared to the unmodifed electrode, the peak current obviously increased and the oxidaton and reducton peaks potental shifed to the negatve and positve potental area, respectvely, meaning the peak potental separaton is reduced. These changes indicated that the composite nanopartcles possess good electrocatalytc performance on the electrochemical reacton of catechol. The experimental results revealed that the nanopartcle modifed electrodes have good performances for catechol sensing, which including convenient fabricaton, low detecton limits and wide linear ranges. These merits of this sensing system provide high potental to apply in environmental monitoring. In additon, kinetc parameters of catechol redox reacton were determined and the number of electrons was obtained two for the three modifed electrodes. Keywords: Catechol; Cetyltrimethylammonium Bromide; Gold Nanopartcle; Sodium Dodecylbenzene Sulfonate; Tween 80 © 2019 Published by Journal of Nanoanalysis. How to cite this artcle Nazari M, Kashanian S, Mohammadi R. Electrodepositon of anionic, catonic and nonionic surfactants and gold nanopartcles onto glassy carbon electrode for catechol detecton. J. Nanoanalysis., 2019; 6(1): 48-56. DOI: 10.22034/jna.2019.664401 ORIGINAL RESEARCH PAPER Tis work is licensed under the Creative Commons Attribution 4.0 International License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. * Corresponding Author Email: kashanian_s@yahoo.com INTRODUCTION A large variety of phenolic compounds are widely used in the manufacture of products, including coal conversion, petroleum refning, pharmaceuticals, production of dyes, pesticides, resins, and plastics and thus readily release into the ground and surface water [1-3]. Te identifcation and quantifcation of these compounds are important for environmental monitoring because many of them are toxic contaminants in medical, food and environmental matrices and have harmful efects on plants, animals and human health [4-6]. Te maximum amount of phenols in wastewater allowed by the European Community is lower than 1 ppm [7]. Many analytical methods are available for the determination of them, such as spectrophotometry, chromatography, and capillary electrophoresis. However, these methods are time- consuming and the instrumentations are expensive [8,9]. Sensors can provide ideal sensing systems