Properties of Zinc Oxide Nanorods as Ethanol Sensor

• Published in: Journal of Physics: Conference Series
• Main Author: Abdul Hamid H.; Lockman Z.; Abdul Razak K.
• Format: Conference paper
• Language: English
• Published: Institute of Physics Publishing 2018
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85054413189&doi=10.1088%2f1742-6596%2f1083%2f1%2f012039&partnerID=40&md5=a9c9c3a239b3f90d6c2dbfe19503d49b

In this work, the zinc oxide (ZnO) nanorods were studied as a potential ethanol sensor for environmental monitoring. Nanorods were grown on indium tin oxide substrate (ZnO/ITO) by using the hydrothermal method with the aid of seeds. The morphology of the ZnO nanorods was characterized by scanning electron microscopy (SEM), energy dispersive X-ray (EDX) and X-ray diffractometer (XRD). The performance of the ZnO nanorods for the electrochemical detection of ethanol was investigated by using cyclic voltammetry (CV). The three electrodes CV system shows high catalytic activity towards the oxidation of ethanol in 1 M potassium hydroxide (KOH) solution. The ZnO/ITO sensor shows high sensitivity of 8.17 μAmM-1cm-2 and the detection limit of 5.2 mM. The linear range is from 7-25 mM with linear correlation coefficient of 0.9589 with good stability. Therefore, ZnO/ITO electrode has great potential as ethanol sensor. © Published under licence by IOP Publishing Ltd.