Work

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

Year: 2024

Type: article

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 (Ra/Rg = 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.

Source: Journal of The Electrochemical Society

DOI: 10.1149/1945-7111/ad6ef6

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

Institution: Shanghai Institute of Technology

Language: English

Topic: Gas Sensing Nanomaterials and Sensors

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $1,855

Funder: Data Center of Management Science, National Natural Science Foundation of China - Peking University