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Abstract

Heterostructured ZnO/Fe2O3 nanofibers were prepared by electrospinning method with the precursors Polyvinyl alcohol, zinc acetate dihydrate and iron (II) chloride anhydrous salts. Through the scanning electron microscopy characterization studies, uniform distribution of nanofibers was observed. These nanofibers were calcinated at 450 °C for 12 h to obtain polycrystalline ZnO/Fe2O3 with average grain diameter of 21 nm. The calcinated ZnO/Fe2O3 nanograins exhibited polycrystalline nature, which is confirmed by the X-ray diffraction pattern. X-ray photoelectron spectroscopy studies confirmed the presence of Zn and Fe in the synthesized ZnO/Fe2O3 nanograins. The prepared heterostructure ZnO/Fe2O3 nanograins showed a good response to 20 ppm of formaldehyde at an operating temperature of 300 °C. ZnO/Fe2O3 nanograins exhibited a quick response (17 s) and recovery (11 s) towards 20 ppm of formaldehyde. The formaldehyde vapour sensing mechanism was proposed based on the electron transport between ZnO/Fe2O3 nanograins at 300 °C.

Details

Title
Heterostructured ZnO/Fe2O3 nanograins-based sensors for formaldehyde detection
Author
Sri Varshini, K. 1 ; Kishore, Kampara Roopa 1 ; Jeyaprakash, B. G. 1 ; Balamurugan, D. 1   VIAFID ORCID Logo 

1  SASTRA Deemed to be University, Functional Nanomaterials lab @ School of Electrical & Electronics Engineering, Thanjavur, India (GRID:grid.412423.2) (ISNI:0000 0001 0369 3226) 
Pages
1317
Publication year
2023
Publication date
Jun 2023
Publisher
Springer Nature B.V.
ISSN
09574522
e-ISSN
1573482X
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1007/s10854-023-10689-z
ProQuest document ID
2825542964
Copyright
© The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.