Effects of varying the amount of reduced graphene oxide loading on the humidity sensing performance of zinc oxide/reduced graphene oxide nanocomposites on cellulose filter paper

Mamat, Mohamad Hafiz and A Subki, A Shamsul Rahimi and Musa, Mohamed Zahidi and Abdullah, Mohd Hanapiah and Shameem Banu, Itreesh Basha and N. Vasimalai and Ahmad, Mohd Khairul and Nayan, Nafarizal and Abu Bakar, Suriani and Azmi, Mohamed and M. Danang, Birowosuto and Mahmood, Mohamad Rusop (2022) Effects of varying the amount of reduced graphene oxide loading on the humidity sensing performance of zinc oxide/reduced graphene oxide nanocomposites on cellulose filter paper. Journal of Alloys and Compounds, 926. pp. 1-21. ISSN 0925-8388

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Abstract

This work presents a nanocomposite-based humidity sensor based on zinc oxide nanostructured powder (ZNP) nanoparticles that achieves a maximum enhancement in the humidity sensing performance at room temperature due to the introduction of different amounts of reduced graphene oxide (rGO) loading from 0.5 wt% to 2.0 wt%. The rGO/ZNP (rZNP) nanocomposite-based humidity sensor was fabricated by using cellulose filter paper as a substrate and clear paper glue as a binder through a facile brush printing method. FESEM, EDS, XRD, HRTEM, XPS, and Raman spectroscopy were employed to investigate the properties of the ZNP and rZNP nanocomposites. The presence of an rZNP nanocomposite with quasi-spherical ZNP nanoparticles that are securely attached and anchored with rGO sheets was confirmed through HRTEM micrographs. Raman spectroscopy analyses confirm and validate the formation of hybrid nanostructures with the presence of distinctive bands related to ZNP and rGO. The presence of oxygen vacancy defects and oxygen-related chemical bonds on the surface of the rZNP nanocomposite, which yields enhanced sensor performance, is revealed by XPS analysis. The rZNP nanocomposite-based humidity sensor with 1.0 wt% rGO loading (rZNP-1.0) had a maximum sensing response of 99.42% and exhibited the highest sensitivity towards humidity changes (172 or 29.2 MΩ/%RH), which was substantially better than the other tested samples.

Item Type:	Article
Uncontrolled Keywords:	Zinc oxide nanostructure, Reduced graphene oxide, RGO/ZnO nanocomposite, Cellulose, Resistive-type humidity sensor
Divisions:	Faculty Of Electronics And Computer Technology And Engineering
Depositing User:	Sabariah Ismail
Date Deposited:	25 Jul 2024 11:31
Last Modified:	25 Jul 2024 11:31
URI:	http://eprints.utem.edu.my/id/eprint/27504
Statistic Details:	View Download Statistic

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