Title: Comparative study of ZnO/Polypyrole and SnO2/ Polypyrole nanocomposites for ammonia gas sensing application

Abstract

A gas sensing system for the detection of harmful and hazardous ammonia gas is made using a Surface Plasmon Resonance (SPR) laboratory setup. In this manuscript, various methods for producing developed ZnO, SnO2 and traditional WO3 and In2O3 nanowires on a large scale and with great reproducibility have been discussed. The NH3 gas-sensing system that was proposed for our developed ZnO and SnO2 performed better than expected. The ZnO/PPy and SnO2/PPy interface is used to successfully demonstrate the SPR system for the detection of NH3 gas. But for NO2 gas applications, the traditional WO3 and In2O3 nanowires technologies are primarily utilized. In order to successfully detect NH3 gas, thin films of 100 nm ZnO and 150 nm PPy were formed, which provide the sharpest SPR reflectance curve. SnO2 performed better when compared to other approaches. The SPR gas sensor exhibits a rapid response (1 s) and good sensitivity (3.15x10-3 o/ppm) for ZnO and (4.5x10-3°/ppm) for SnO2 towards NH3 gas over a wide concentration range (1 to 10 ppm). Additionally, the dynamic response was seen, and from the calibration curve, the sensitivity was calculated to be 0.202 /ppm for SnO2 and 0.121 /ppm for ZnO, respectively. Because of improved response characteristics, the research demonstrates that efficient SPR gas sensors are accomplished in the current SnO2 with PPy work.

Biography

Ajay Pratap Singh Gahlot received his B.Sc. Physics (Hons) from Dyal Singh College, University of Delhi and M.Sc. degree in physics from the University of Delhi, New Delhi, India. Currently, he is working as Associate Professor, Department of Physics, Deshbandhu College, University of Delhi. His research interests are in the area of Condensed Matter physics, High temperature Superconductivity, Perovskite Solar Cell and the Study of Nanostructures based design of devices for gas sensing application. Presently, working on SnO2/ZnO /Polypyrrole Composite Nanomaterials and its various properties and applications. He has vast experience of teaching at different colleges. He is the life member of Math Tech Thinking Foundation: Fazilka, Punjab, India, Also, an affiliate member of Royal Society of Chemistry and American Chemical Society. Have experience of organizing several national & international conferences and seminars.