Sunlight assisted synthesis of silver nanoparticles in zeolite matrix and study of its application on electrochemical detection of dopamine and uric acid in urine samples
By Meenakshi, S.; Devi, S.; Pandian, K.; Devendiran, R.; Selvaraj, M.
Published in Materials Science and Engineering: C
2016
Abstract
Abstract Sunlight assisted reduction of silver ions were accomplished for the synthesis of silver nanoparticles incorporated within the mesoporous silicate framework of zeolite Y. The zeolite-Y and AgNP/Zeo-Y were characterized by field emission scanning electron microscopy, transmission electron microscopy, {N2} adsorption-desorption {BET} isotherm and X-ray diffraction techniques. The incorporation of silver nanoparticles within the porous framework was further confirmed by cyclic voltammetry and electrochemical impedance spectroscopy. An enhanced electrocatalytic oxidation of biologically important molecules like dopamine and uric acid using AgNP/Zeo-Y modified glassy carbon electrode has been developed. A simultaneous oxidation of {DA} and {UA} peaks were obtained at + 0.31 V and + 0.43 V (vs. Ag/AgCl) using AgNP/Zeo-Y/GCE under the optimum experimental condition. A well-resolved peak potential window ( 120 mV) for the oxidation of both {DA} and {UA} were observed at AgNP/Zeo-Y/GCE system. The calibration curves for {DA} and {UA} were obtained within the dynamic linear range of 0.02