Electrochemical nitric oxide detection using gold deposited cobalt oxide nanostructures

Abstract

Hydrothermal synthesis of cobalt oxide (CoO) nanostructures were grown on fluorine doped tin oxide (FTO) substrates for electrochemical NO detection. The NO sensing performance of the electrodes has been improved by depositing gold nanoparticles using photoreduction method. The electrochemical NO sensing was performed using amperometric i-t measurements. The optimized Au decorated CoO electrode demonstrated sensitivity 1.37 mM−1 μA cm−2 with wide linear range 10 μM−1.4 mM. The determination of dissolved NO in tap water and tube well water have been studied using such Au-CoO electrodes.