Application of PLA/GO/ZnO and PLA/GO/Cu2O as sensor

Polylactic acid modified with graphene oxide (PLA/GO) is proposed to interact with ZnO through 6 different schemes. Density functional theory at B3LYP/LANL2DZ level was utilized to calculate total dipole moment (TDM), HOMO/LUMO energy gap (ΔE) and to map the molecular electrostatic potential (MESP)....

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Bibliographic Details
Published in:Scientific reports 2024-09, Vol.14 (1), p.22022-11, Article 22022
Main Authors: Amin, Khaled S., Yassin, Mohamed M., Abdallah, Yahia M., Alsayyad, Yusuf M., Elhaes, Hanan, Ibrahim, Medhat A.
Format: Article
Language:English
Subjects:
639/301
704/172
Adsorption
Carbon dioxide
DFT: B3LYP/LANL2DZ
Electrostatic properties
Energy
Ethanol
Gas senor and metal oxide semiconductors
Gases
Humanities and Social Sciences
Hydrogen sulfide
multidisciplinary
PLA
Polylactic acid
Science
Science (multidisciplinary)
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Summary:Polylactic acid modified with graphene oxide (PLA/GO) is proposed to interact with ZnO through 6 different schemes. Density functional theory at B3LYP/LANL2DZ level was utilized to calculate total dipole moment (TDM), HOMO/LUMO energy gap (ΔE) and to map the molecular electrostatic potential (MESP). Results indicated that PLA/GO interacted with ZnO through O-atom forming PLA/GO/OZn composite. This composite interacts with methane, hydrogen sulfide, humidity (H 2 O), carbon dioxide and ethanol. The same gases were supposed to interact further with PLA/GO/Cu 2 O. Adsorption energy for the interaction between each composite and the proposed gases were calculated. Both PLA/GO/OZn and PLA/GO/Cu 2 O composites interacted favorably with H 2 O. Adsorption energy for interaction of other gases with studied structures are generally low compared to H 2 O. PLA/GO/OZn have adsorption energy slightly higher than that of PLA/GO/Cu 2 O. PLA/GO/OZn has higher TDM values than those of PLA/GO/Cu 2 O, indicating a more polar material. Conversely, PLA/GO/Cu 2 O exhibited larger ΔE values than those of PLA/GO/OZn. TDM and energy gap results for both studied structures indicated good sensing capabilities. Further insights come from analyzing the calculated density of states (DOS) and partial density of states (PDOS). PLA/GO/Cu 2 O exhibited high peak for copper in its DOS and PDOS spectra compared to zinc and oxygen in case of PLA/GO/OZn. This means a higher density of available electronic states associated with Cu.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-024-65913-5