Print Email Facebook Twitter Enhancing the absorption of 1-chloro-1,2,2,2-tetrafluoroethane on carbon nanotubes Title Enhancing the absorption of 1-chloro-1,2,2,2-tetrafluoroethane on carbon nanotubes: an ab initio study Author Mohammadi, Mohsen Doust (University of Tehran) Abdullah, Hewa Y. (Tishk International University) Biskos, G. (TU Delft Atmospheric Remote Sensing; The Cyprus Institute) Bhowmick, Somnath (The Cyprus Institute) Date 2021 Abstract We have investigated the possibility of utilizing various single-walled pristine and doped carbon nanotubes as adsorbents for the 1-chloro-1,2,2,2-tetrafluoroethane (HCFC-124) gaseous molecule. Three candidates, including pristine carbon nanotube (CNT), silicon carbide nanotube (SiCNT) and germanium-doped SiCNT (SiCGeNT) are identified and evaluated theoretically. The quantum simulations have been performed at the density functional theory (DFT) level with four different functionals (i.e., M06-2X, ωB97XD, CAM-B3LYP and B3LYP-D3) with a split-valence triple-zeta basis set (6-311G(d)). We found that adsorption on the SiCGeNT is most favourable, while that on the pristine CNT yields the lowest adsorption energy. Adsorption on these nanotubes is not accompanied by an active charge-transfer phenomenon; instead, it is driven by weak van der Waals forces. The HOMO–LUMO energy gaps drastically change when the dopant atom is added to the SiCNT, thereby improving their overall adsorption capability. Among all of the adsorbents investigated here, SiCGeNT shows the most favourable for designing effective HCFC-124 nanosensors. Subject 1-chloro-1,2,2,2-tetrafluoroethanefreon 124HCFC-124natural bond orbitalSilicon carbide nanotube To reference this document use: http://resolver.tudelft.nl/uuid:33a19431-1598-4e5e-a89f-2c097d1d4fd3 DOI https://doi.org/10.1007/s12034-021-02472-9 ISSN 0250-4707 Source Bulletin of Materials Science, 44 (3) Part of collection Institutional Repository Document type journal article Rights © 2021 Mohsen Doust Mohammadi, Hewa Y. Abdullah, G. Biskos, Somnath Bhowmick Files PDF MOHAMMADI2021_Article_Enh ... 1_chlo.pdf 2.83 MB Close viewer /islandora/object/uuid:33a19431-1598-4e5e-a89f-2c097d1d4fd3/datastream/OBJ/view