Synthesis of WO3 Nanorods and Their Excellent Ethanol Gas-Sensing Performance

Abstract

WO 3 nanorods were synthesized via a simple hydrothermal approach. Their microstructure and morphology were analyzed with x-ray diffraction, scanning electron microscope and x-ray photoelectron spectroscopy. The effects of reaction temperature, reaction time, and citric acid concentration, on the gas-sensing performance of WO 3 nanorods were investigated. The optimized response value of WO 3 sensor to ethanol gas (100 ppm) was 26.48, with a response time of 1 s under a low operating temperature (160 °C). The recovery capability and stability of the gas sensor were tested and discussed. Additionally, the working principle of WO 3 sensor was proposed. In comparison to the sensors published by previous researchers, the WO 3 sensor has shown great potential.

Supplementary document for Photoluminescence-based sensing of ethanol gas with ultrafine WO3 nanorods - 5629400.pdf

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Constructing Z-Scheme WO3–CeO2 Heterojunctions for Selective Sensing of NO2 or Acetone Gas under UV Light Irradiation

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ZnO Nanostructure Synthesized by Hydrothermal Method for Butane Gas Sensor

“…Metal oxide semiconductors are used to fabricate nanosensor gases because they have high sensitivity and can be facilitated with good, easily fabricated, and inexpensive gases [22]. The metal oxide semiconductor materials used as gas sensors are ZnO [23], SnO2 [24], WO3 [25], Ga2O3 [26], TiO2 [27] and Fe2O3 [28]. Among these materials, ZnO is the material most widely developed by researchers.…”