https://doi.org/10.1140/epjb/s10051-023-00601-3
Regular Article - Computational Methods
Computational analysis of CdS monolayer nanosheets for gas-sensing applications
1
College of Dentistry, University of Kufa, Najaf, Iraq
2
Department of Physics, Faculty of Science, University of Kufa, Najaf, Iraq
3
Department of Chemistry, Faculty of Science, University of Kufa, Najaf, Iraq
4
School of Chemistry, University of Birmingham, B15 2TT, Birmingham, UK
5
College of Engineering, University of Warith Al-Anbiyaa, Kerbala, Iraq
b
abbas.abonasiriya@uokufa.edu.iq
c
haydera.abdulhussein@uokufa.edu.iq
Received:
27
April
2023
Accepted:
25
September
2023
Published online:
17
October
2023
The pollution of the atmospheric environment has significantly increased due to the rapid growth of population and industrial development. To prevent environmental disasters caused by such deterioration, it is imperative to control and monitor such pollutants. This study investigates the structural, electronic, and optical characteristics of the CdS monolayer nanosheets, and evaluates their gas adsorption behavior for various gas molecules (CO2, SO2, H2S, CO, and SO) using DFT calculations. SO2, H2S, and CO are found to show weak adsorption suggesting the physisorption behavior, whereas CO2 and SO adsorption systems are found to undergo chemical adsorption on the CdS surface, suggesting it as a promising sensing material for the latter gasses. The electronic structure and geometrical positions of the gas molecules on monolayer CdS surface have been analyzed, revealing a significant alteration in the band gap of CdS upon the the adsorption of gas molecules. We also investigated the optical properties of the monolayer CdS in the presence of the gasses, indicating that the real and imaginary components of the dielectric function are crucial for sensing applications, and changes in the absorption spectrum of the CdS monolayer upon adsorption of the different gasses can be attributed to the specific electronic and chemical properties of each gas and their interaction with the CdS surface.
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© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
