Gas sensor preparation based on WO3-Bi2WO6 and optimized mechanism of enhanced gas-sensing performance for triethylamine gas

被引：0
|
作者：
Guo W. [1 ]
Jian L. [1 ]
Zhang J. [1 ]
Li J. [1 ]
Long M. [1 ]
Wang X. [1 ]
机构：
[1] Chongqing Key Laboratory of Catalysis and New Functional Materials, College of Environment and Resources, Chongqing Technology and Business University, Chongqing
来源：
Zhongguo Kexue Jishu Kexue/Scientia Sinica Technologica | 2023年 / 53卷 / 04期
关键词：
Bi[!sub]2[!/sub]WO[!sub]6[!/sub; gas sensor; gas-sensing material; triethylamine; WO[!sub]3[!/sub;
D O I：
10.1360/SST-2022-0237
中图分类号：
学科分类号：
摘要：
Triethylamine is a common toxic and harmful gas in industries and corrupt food, which is harmful to the human body and environment, so it is necessary to detect triethylamine gas. Bi2WO6 and WO3 are widely used in gas sensing due to their excellent physical and chemical properties. Herein, Bi2WO6, WO3, and WO3-Bi2WO6 are successfully synthesized by a one-step hydrothermal method. Several characterizations are used to analyze the crystal structures, morphologies, chemical compositions, and optical and electrochemical properties of the as-prepared samples. Meanwhile, the optimum working temperatures, selectivity characteristics, response and recovery times,stability characteristics, and humidity resistances of the gas-sensing materials are investigated comprehensively. The results show that 0.5 WO3-Bi2WO6 exhibits high gas response (33.0), fast response and recovery times (12 s/ 36 s), excellent stability, and unique selectivity toward 30 ppmtriethylamine at 300°C. Additionally, the enhanced gas-sensing mechanism of 0.5 WO3-Bi2WO6 is proposed, which provides a feasible strategy for optimizing the gas-sensing performance of 0.5 WO3-Bi2WO6 © 2023 Chinese Academy of Sciences. All rights reserved.
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页码：509 / 524
页数：15
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