Vertically Aligned ZnO-WO<inf>3</inf> Nanorods with Core-Shell Heterostructure for Ethanol Sensing at Low Temperature: In Situ XAS Study
Issued Date
2024-01-01
Resource Type
eISSN
25740970
Scopus ID
2-s2.0-85204353096
Journal Title
ACS Applied Nano Materials
Rights Holder(s)
SCOPUS
Bibliographic Citation
ACS Applied Nano Materials (2024)
Suggested Citation
Duangmanee S., Poo-Arporn Y., Senamart N., Kamonpha P., Leuasoongnoen P., Janphuang P., Chanlek N., Kidkhunthod P., Subannajui K., Poo-Arporn P.R. Vertically Aligned ZnO-WO<inf>3</inf> Nanorods with Core-Shell Heterostructure for Ethanol Sensing at Low Temperature: In Situ XAS Study. ACS Applied Nano Materials (2024). doi:10.1021/acsanm.4c03545 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/101379
Title
Vertically Aligned ZnO-WO<inf>3</inf> Nanorods with Core-Shell Heterostructure for Ethanol Sensing at Low Temperature: In Situ XAS Study
Corresponding Author(s)
Other Contributor(s)
Abstract
The present study employed a hybrid approach involving hydrothermal and sputtering techniques to produce ZnO-WO3 composites, which were subsequently evaluated for their suitability as ethanol gas sensors. It is possible to achieve a notable decrease in the operating temperature. SEM and TEM measurements revealed that the diameter of the nanorod film varied from 25 to 100 nm, with a thickness of 2.1 μm. XPS enables the observation of the rise in the number of labile oxygen species. The highest percentage of chemisorbed oxygen species was shown by ZnO-60WO3, indicating its possible advantage in the development of ethanol sensors. The structural characteristics of the produced film were examined by using the in situ XAS measurement after its exposure to ethanol. It was discovered that 250 °C was the optimum temperature for ethanol detection on ZnO-60WO3. Based on the findings from SEM, TEM, XPS, and XAS analyses, it has been observed that the enhanced ethanol detection ability of the ZnO-WO3 sensor is influenced by the quantity of readily reactive oxygen species and surface area. Moreover, the development of a heterogeneous junction between ZnO and WO3 could also contribute to the enhanced capacity to identify ethanol gas.