Controlling Oxygen Vacancy Content by Varying Calcination Temperature to Enhance the Gas Sensing Performance of BiVO4 Material

IF 3.1 4区工程技术 Q2 ELECTROCHEMISTRY Journal of The Electrochemical Society Pub Date : 2024-08-28 DOI:10.1149/1945-7111/ad6ef6

Si-Qi Jiao, Yu-Feng Liu, Xiao-Hong Zheng, Cheng Zhang, Xiao-Rui Wang

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Abstract

Compared to gas sensors based on single metal oxide, gas sensors based on binary metal oxide semiconductors (MOS) offer a rich variety of structural types and hold great potential for excellent selectivity. Inspired by this, we synthesized BiVO₄ powder through a stepwise reaction combining calcination with hydrothermal bath and investigated the influence of different calcination temperatures on its gas sensitivity performance. Our study revealed that BiVO₄-600 exhibited optimal TEA gas sensing behavior at 225 °C, showing high response values (R_a/R_g = 43.4) and fast response/recovery times (15 s/52 s). Additionally, the sensor displayed high stability, repeatability, and exceptional selectivity. Preliminary research indicates that calcination temperature induces changes in the oxygen vacancy content of BiVO₄, thus affecting its sensing performance.

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通过改变煅烧温度控制氧空位含量以提高 BiVO4 材料的气体传感性能

与基于单一金属氧化物的气体传感器相比，基于二元金属氧化物半导体（MOS）的气体传感器具有丰富的结构类型，在实现优异的选择性方面潜力巨大。受此启发，我们通过煅烧与水浴相结合的分步反应合成了 BiVO4 粉末，并研究了不同煅烧温度对其气体灵敏度性能的影响。研究结果表明，BiVO4-600 在 225 ℃ 时具有最佳的三乙醇胺气体传感性能，显示出高响应值（Ra/Rg = 43.4）和快速响应/恢复时间（15 秒/52 秒）。此外，该传感器还具有高稳定性、可重复性和优异的选择性。初步研究表明，煅烧温度会导致 BiVO4 的氧空位含量发生变化，从而影响其传感性能。

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来源期刊

Journal of The Electrochemical Society 工程技术-电化学

CiteScore

7.20

自引率

12.80%

发文量

1369

审稿时长

1.5 months

期刊介绍： The Journal of The Electrochemical Society (JES) is the leader in the field of solid-state and electrochemical science and technology. This peer-reviewed journal publishes an average of 450 pages of 70 articles each month. Articles are posted online, with a monthly paper edition following electronic publication. The ECS membership benefits package includes access to the electronic edition of this journal.