Design of hetero-nanojunction of RGO/\(\alpha\)-Fe\(_2\)O\(_3\) nanofibers for ethanol gas sensor

Hong Phuoc Phan; Viet Thong Le; Van Hoang Nguyen; Duc Hoa Nguyen; Van Duy Nguyen; Ngoc Viet Nguyen; Van Hieu Nguyen

doi:10.15625/0868-3166/17513

Author affiliations

Authors

Phan Hong Phuoc Faculty of Electrical and Electronic Engineering, Phenikaa University, Hanoi, Vietnam
Le Viet Thong Faculty of Electrical and Electronic Engineering, Phenikaa University, Hanoi, Vietnam
Nguyen Van Hoang Department of Materials Science and Engineering, Le Quy Don Technical University, Hanoi, Vietnam
Nguyen Duc Hoa International Training Institute for Materials Science, Hanoi University of Science and Technology, Hanoi, Vietnam.
Nguyen Van Duy International Training Institute for Materials Science, Hanoi University of Science and Technology, Hanoi, Vietnam.
Nguyen Ngoc Viet Faculty of Electrical and Electronic Engineering, Phenikaa University, Hanoi, Vietnam
Nguyen Van Hieu \(^1\)Faculty of Electrical and Electronic Engineering, Phenikaa University, Hanoi, Vietnam;
\(^2\)Phenikaa Research and Technology Institute (PRATI), A&A Green Phoenix Group, Hanoi, Viet Nam https://orcid.org/0000-0002-9613-9108

DOI:

https://doi.org/10.15625/0868-3166/17513

Keywords:

RGO, electrospinning, RGO-loaded \(\alpha\)-Fe\(_2\)O\(_3\) nanofibers, ethanol

Abstract

Enhanced gas sensing properties of hematite \(\alpha\)-Fe₂O₃ by loaded reduced graphene oxides (RGO) have attracted considerable attention. In this study, RGO-loaded \(\alpha\)-Fe₂O₃ nanofibers were fabricated via the facile electrospinning method and subsequent calcination process. The scanning electron microscopy (SEM) images showed that RGO-loaded \(\alpha\)-Fe₂O₃nanofibers with diameters of 50-100 nm have typical morphologies of spider nets. The X-ray diffraction (XRD) patterns revealed the rhombohedral structure of the RGO-loaded α-Fe₂O₃ nanofibers. The energy dispersive X-ray spectroscopy (EDS) results exhibited the presence of Fe, O, and C elements in the synthesized nanofibers. The gas sensing results also confirmed that the sensors based on RGO-loaded \(\alpha\)-Fe₂O₃ nanofibers could be applied for detecting ethanol gas.

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