首页|Grain boundary-induced drastic sensing performance enhancement of Fe2O3 gas sensors for acetone

Grain boundary-induced drastic sensing performance enhancement of Fe2O3 gas sensors for acetone

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Exploring the structure-activity relationship between the performance of gas sensors and the structure of semiconductor metal oxide(SMO)nanomaterials is crucial for understanding and designing gas-sensing materials and overcoming the application limitations of SMO-based gas sensors.Regulation of a single SMO microstructure provides a promising solution to address this scientific problem due to its controllable composition.In this study,we control the grain boundary(GB)density of Fe2O3 nanomaterials using a simple solvothermal method.They have similar chemical compositions and crystal phases,providing an ideal platform for studying the influence of the GB density on the gas-sensing perfor-mance.Gas-sensing tests showed that the Fe2O3-1 sensor with medium GB density and the Fe2O3-2 sensor with high GB density had higher sensitivity and selectivity than the Fe2O3-0 sensors with low GB density before reaching the optimal operating temperature.However,when the GB density increased,the response to acetone decreased slightly,whereas the optimal operating temperature decreased.This work highlights the unique performance of the GB density in enhancing the gas sensitivity of a single SMO.

Semiconductor metal oxide(SMO)Grain boundary(GB)densityOxygen adsorptionCharge transferGas sensors

Tian-Jun Hu、Yi-Fan Li、Yu-Zhu Tian、Ying Wang、Ya-Ru Chen、Jun-Ming Zhang、Er-Gui Luo、Jian-Feng Jia

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Key Laboratory of Magnetic Molecules & Magnetic Information Materials Ministry of Education,School of Chemical and Material Science,Shanxi Normal University,Taiyuan 030032,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaProgram for New Century Excellent Talents in University of Ministry of Education of ChinaNatural Science Foundation of Shanxi ProvinceNatural Science Foundation of Shanxi ProvincePostgraduate Innovation Project of Shanxi Normal UniversityChina Postdoctoral Science Foundation

2157111922209102NCET-12-1035202203021211253202103021244732022XSY0222021M691366

2024

10.1007/s12598-024-02712-x

稀有金属(英文版)
中国有色金属学会

稀有金属(英文版)

CSTPCDEI
影响因子：0.801
ISSN：1001-0521
年,卷(期)：2024.43(9)
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