Your browser doesn't support javascript.
loading
Theoretical insights into the adsorption and gas sensing performance of Fe/Cu-adsorbed graphene.
Nguyen, Ngoc Tri; Ho, Dai Q; Trung, Nguyen Tien.
Afiliação
  • Nguyen NT; Lab of Computational Chemistry and Modelling (LCCM), Faculty of Natural Sciences, Quy Nhon University, Quy Nhon 55113, Binh Dinh, Vietnam. nguyenngoctri@qnu.edu.vn.
  • Ho DQ; Lab of Computational Chemistry and Modelling (LCCM), Faculty of Natural Sciences, Quy Nhon University, Quy Nhon 55113, Binh Dinh, Vietnam. nguyenngoctri@qnu.edu.vn.
  • Trung NT; Department of Materials Science and Engineering, University of Delaware, Newark 19716, Delaware, USA.
Phys Chem Chem Phys ; 26(19): 14265-14276, 2024 May 15.
Article em En | MEDLINE | ID: mdl-38690852
ABSTRACT
The binding mechanism of gas molecules on material surfaces is essential for understanding adsorption and sensing performance. In the present study, we examine the interaction of some volatile organic compounds (VOCs), including HCHO, C2H5OH, and CH3COCH3, on pristine graphene and its Fe/Cu-adsorbed surfaces using first-principles calculations. The results indicate that the adsorption of these molecules on graphene is regarded as physisorption, while chemisorption is observed for Fe/Cu attached surfaces. The binding of sites on molecules and surfaces primarily involves hydrogen bonds for the pure form of graphene. In contrast, stable interactions occur at functional groups such as >CO, -OH with Fe/Cu atoms, as well as CC bonds of π-rings on modified structures of graphene. It is noticeable that stronger adsorption is observed in the case of Fe addition (Gr-Fe) compared to Cu (Gr-Cu), enhancing the gas adsorption and sensing performance on graphene. Remarkably, the graphene surfaces supported by Fe and Cu improved selectivity in detecting VOC molecules, particularly C2H5OH and CH3COCH3 for Gr-Fe, and HCHO for Gr-Cu. Quantum chemical analyses reveal that the Fe/Cu⋯O/C contacts are covalent interactions, contributing significantly to the stability of configurations and sensing properties of Fe/Cu-adsorbed graphene. In summary, the observed improvements in selectivity, enhanced adsorption strength, and the identification of crucial interactions at the surface offer valuable insights into designing highly efficient gas sensors and developing advanced sensing materials.

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Phys Chem Chem Phys Assunto da revista: BIOFISICA / QUIMICA Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Vietnã

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Phys Chem Chem Phys Assunto da revista: BIOFISICA / QUIMICA Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Vietnã
...