Detection of low PPM of volatile organic compounds using nanomaterial functionalized reduced graphene oxide sensor

Mohd Tombel, Nor Syahira and Mohamad Badaruddin, Siti Aishah and Md Yakin, Firzalaila Syarina and Mohd Zaki, Hasan Firdaus and Syono, Mohd Ismahadi (2021) Detection of low PPM of volatile organic compounds using nanomaterial functionalized reduced graphene oxide sensor. In: Proceedings of the 2nd Physics and Materials Science International Symposium (PhyMaS 2.0), 27 January 2021, Online Presentation.

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Abstract

per, Volatile organic compounds (VOCs) detection was demonstrated on reduced graphene oxide (RGO) as ensing material that was integrated on Ti/Pt interdigitated electrode (IDE) deposited on a SiO2/Si substrate. The RGO sensing layer has been functionalized with gold nanoparticles (Au-NPs) to enhance the sensitivity of the gas sensor. The detection of ppm level of VOC gases such as acetone, toluene and isoprene were performed at room temperature 30C and 40% relative humidity (RH), with low operating temperature and low power consumption. The slopes value for RGO sensor response against gradual increase of concentration of VOC gas showed decrement in the resistance reading. The functionalization RGO with Au have improve the sensitivity and selectivity of the sensor towards the targeted VOC gas. The bare RGO sensing layer has a sensitivity towards acetone and RGO-Au (30W 75s) sensitive towards toluene. Meanwhile isoprene has a good response on the sensing element of the bare RGO and RGO-Au (70W 15s). Hence, RGO s sensing elements have shown good responses towards low concentration of VOCs gas at room temperature and ambient humidity.

Item Type:	Conference or Workshop Item (Slide Presentation)
Uncontrolled Keywords:	Volatile Organic Compounds
Subjects:	Q Science > QA Mathematics > QA75 Electronic computers. Computer science
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering > Department of Mechatronics Engineering
Depositing User:	Dr. Hasan Firdaus Mohd Zaki
Date Deposited:	11 Aug 2021 14:35
Last Modified:	11 Aug 2021 14:35
URI:	http://irep.iium.edu.my/id/eprint/91237

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