Enhanced humidity sensing behavior of polymer-assisted WO3/ZnO composite
The excess and deficiency of water vapors in the air impact human health, the decaying process of plants, and the rusting process in metals. Humidity sensors based on WO3/ZnO composites appear to be a promising candidate for humidity measurements. In the present work, polymer-assisted WO3/ZnO compos...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-09-01
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| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785425019143 |
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| Summary: | The excess and deficiency of water vapors in the air impact human health, the decaying process of plants, and the rusting process in metals. Humidity sensors based on WO3/ZnO composites appear to be a promising candidate for humidity measurements. In the present work, polymer-assisted WO3/ZnO composite is synthesized via the electrospinning route. X-ray diffraction (XRD) results confirm the monoclinic structure of WO3 and the hexagonal structure of ZnO, with their respective diffraction peaks observed in the composite. Scanning electron microscope (SEM) images show uniformly sprinkled ZnO nanoparticles on the surface of WO3. Energy dispersive X-ray (EDX) spectroscopy confirms the tungsten, oxygen, and zinc peaks, supporting their presence in the composite. Humidity sensing of the sensors is measured by the electrical resistance method at room temperature in the 11–97 % relative humidity (%RH) range. WO3/ZnO-based humidity sensors showed the estimated response time of ∼ 9 s and recovery time of∼ 1s as % RH changes from 11 % to 97 % RH. Based on the capacitance value, the non-Debye peaks are visualized. Due to its high sensitivity, faster reaction and recovery time, the proposed composite is an effective material to be used as a humidity sensor. |
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| ISSN: | 2238-7854 |