Author(s):
1. Himayat Ullah:
University of Peshawar,Peshawar,Pakistan
2. Kashif Khan:
University of Peshawar,Peshawar,Pakistan
3. Yaseen Jamal:
University of Peshawar,Peshawar,Pakistan
4. Hummaira Shahzad:
University of Peshawar,Peshawar,Pakistan
Abstract:
Gas sensors with high stability are used to detect NH3 (an irritant gas causing coughing, congestion, headache etc) at room temperature even at low concentration. Here we report a synthesis method for binary composite of reduced graphene oxide (RGO) coupled with zinc oxide (RGZ) while ternary composite of reduced graphene oxide coupled with zinc and nickel oxide (RGZN) through solvothermal method for NH3 sensing at room temperature. The prepared composites were then characterized through XRD, UV visible spectroscopy, FTIR, SEM and used for NH3 sensing through electrochemical method. The sensing electrode was exposed to different concentration of NH3 and showed good sensitivity. The RGO provided larger surface area and the metal oxides act as catalyst. In both the composites, the ternary composite (RGZN) showed good efficiency towards NH3 sensing as compared to that of acetone and chloroform. This composite showed good sensitivity of 96.6% towards 60 ppm of NH3 with response and recovery time of 45/150 s at room temperature. Beside this the electrode showed 99% of its initial sensitivity after 50 days which proves its larger stability of using it at room temperature. The prepared composite will be a good material towards ammonia sensing with greater reproducibility.
Page(s):
0-0
DOI:
DOI not available
Published:
Journal: Sixth International Conference on Sustainability in Process Industries (SPI) 19-20 Octover 2022 (Book of Abstracts), Volume: 0, Issue: 0, Year: 2022
Keywords:
Zinc
,
Graphene oxide
,
Binary and Ternary Composites
,
Nickel Oxide Nanoparticles
References:
References are not available for this document.
Citations
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