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

Tian-Jun Hu ¹Yi-Fan Li ¹Yu-Zhu Tian ¹Ying Wang ¹Ya-Ru Chen ¹Jun-Ming Zhang ¹Er-Gui Luo ¹Jian-Feng Jia¹

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作者信息

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

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.

Key words

Semiconductor metal oxide(SMO)/Grain boundary(GB)density/Oxygen adsorption/Charge transfer/Gas sensors

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基金项目

National Natural Science Foundation of China(21571119)

National Natural Science Foundation of China(22209102)

Program for New Century Excellent Talents in University of Ministry of Education of China(NCET-12-1035)

Natural Science Foundation of Shanxi Province(202203021211253)

Natural Science Foundation of Shanxi Province(20210302124473)

Postgraduate Innovation Project of Shanxi Normal University(2022XSY022)

China Postdoctoral Science Foundation(2021M691366)

出版年

2024

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

参考文献量2

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