期刊
JOURNAL OF THE AUSTRALIAN CERAMIC SOCIETY
卷 57, 期 4, 页码 1231-1240出版社
SPRINGER
DOI: 10.1007/s41779-021-00622-0
关键词
Oxygen sensing; Nanoplates; WO3-WS2 hybrid; p-n junction; Two-dimensional dichalcogenides
资金
- Higher Education Commission (HEC) Pakistan
- National Research Program for Universities (NRPU) program [3662]
This paper reports the development of WO3-WS2 nanoplates for highly selective oxygen sensing application, with XRD confirming the formation of a hybrid structure and showing improved performance compared to WO3 nanoplates. The study demonstrated that the WO3-WS2 nanoplates have shorter response and recovery times, attributed to the formation of a deeper depletion layer providing additional adsorption sites for oxygen species.
In this paper, the development of two-dimensional metal dichalcogenide WO3-WS2 nanoplates for highly selective oxygen sensing application was reported. A facile precipitation method to produce self-assembled WO3 nanoplates and one-step solid-state synthesis of self-assembled WO3-WS2 nanoplates was described. X-ray diffraction (XRD) confirms the formation of WO3 and WO3-WS2 hybrid structure. The as-synthesized nanoplates were investigated for sensing applications of ethanol, methanol, n-butanol, LPG, and O-2 gas. Study revealed that both as-synthesized WO3 and WO3-WS2 nanoplate sensors are highly selective for oxygen sensing application. Response percentage of WO3 nanoplates and WO3-WS2 nanoplates measured at 500-ppm oxygen concentration was 40% and 95% respectively. The measured response time and recovery times of WO3-WS2 nanoplate sensor was shorter than WO3 nanoplate sensor at all concentrations. The improved performance of as-synthesized WO3-WS2 nanoplates was attributed to the formation of deeper depletion layer between WS2 and WO3 p-n junction which provide additional adsorption sites for oxygen species.
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