High-sensitivity SO2 Gas Sensor Based on Noble Metal Doped WO3 Nanomaterials

作者：Hang Liu, Jiani Zhou, Lanyi Yu, Qiuchen Wang, Bing Liu, Peihua Li, Yuhong Zhang · 发表于：International Journal of Electrochemical Science · 年份：2021 · DOI：10.20964/2021.12.39 · 被引用次数：26 · 研究领域：Gas Sensing Nanomaterials and Sensors、Advanced Chemical Sensor Technologies、Analytical Chemistry and Sensors

In this paper, the WO 3 nanoparticles(NPs) were prepared by a facile and low cost chemical coprecipitation method. Then the Pt-WO 3 and Au-WO 3 were synthesized. The morphologies of the samples were represented by XRD and SEM. Sensing characteristics of novel metal doped WO 3 sensors were investigated by exposure to SO 2 gas at different operating temperature. The sensor response for SO 2 gas was measured with different concentrations from 100 ppb to 16 ppm. As a result, the 1 wt%Pt-WO 3 sensor presented a greatly low detection limit of 100 ppb at optimum operating temperature of 160 °C. The sensitivity of 1 wt%Pt-WO 3 sensor for 100 ppb reached 4.1. As well as a better sensor response as compared to the other SO 2 gas sensor. It demonstrated that the Pt-WO 3 materials may be used to develop the commercial SO 2 gas sensor.