Co-doped zigzag graphene nanoribbon based gas sensor for sensitive detection of H2S: DFT study
Author | Salih, Ehab |
Author | Ayesh, Ahmad I. |
Available date | 2024-05-02T10:31:25Z |
Publication Date | 2021-07-01 |
Publication Name | Superlattices and Microstructures |
Identifier | http://dx.doi.org/10.1016/j.spmi.2021.106900 |
Citation | Salih, E., & Ayesh, A. I. (2021). Co-doped zigzag graphene nanoribbon based gas sensor for sensitive detection of H2S: DFT study. Superlattices and Microstructures, 155, 106900. |
ISSN | 07496036 |
Abstract | In this work, we present a highly sensitive gas sensor for the detection of poisonous hydrogen sulfide gas (H2S) based on copper and zinc co-doped zigzag graphene nanoribbon (Cu/Zn-ZGNR). The electronic properties as well as the sensing performance of Cu/Zn-ZGNR toward H2S were investigated employing density functional theory (DFT). The adsorption capacity of the newly developed Cu/Zn-ZGNR system was compared with both pristine ZGNR as well as doped Zn-ZGNR and Cu-ZGNR systems. The adsorption energy (Eads) of H2S/Zn-ZGNR and H2S/Cu-ZGNR systems were found to be −2.237 and −1.129 eV, respectively. For the case of H2S/Cu/Zn-ZGNR, the adsorption energy (Eads) and charge transfer (Δq) reflected an outstanding increase to −7.043 eV and −0.311 e, respectively, when compared with both pristine and doped systems: ZGNR, Zn-ZGNR, and Cu-ZGNR. Moreover, the adsorption distance (D) between H2S and Cu/Zn-ZGNR decreased remarkably to 2.23 Å and an S–Cu bond was generated. The response towards H2S of the developed ZGNR, Zn-ZGNR, Cu-ZGNR, and Cu/Zn-ZGNR gas sensors has been investigated as well. Particularly, the response of H2S to Cu/Zn-ZGNR system demonstrated a significant high value of 48.92%. Therefore, the newly developed co-doped Cu/Zn-ZGNR based gas sensor can be recommended as a highly sensitive H2S sensor. |
Sponsor | The publication of this article was funded by the Qatar National Library . |
Language | en |
Publisher | Academic Press |
Subject | Co-doping Cu and Zn doping Graphene H S gas Sensor 2 Zigzag nanoribbon |
Type | Article |
Volume Number | 155 |
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Mathematics, Statistics & Physics [740 items ]