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

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

作者机构：Key Laboratory of Magnetic Molecules & Magnetic Information Materials Ministry of EducationSchool of Chemical and Material ScienceShanxi Normal University 

出 版 物：《Rare Metals》 (稀有金属(英文版))

年 卷 期：2024年第43卷第9期

页      面：4412-4424页

核心收录：

学科分类：0806[工学-冶金工程] 080202[工学-机械电子工程] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 

基　　金：financially supported by the National Natural Science Foundation of China (Nos.21571119 and 22209102) the Program for New Century Excellent Talents in University of Ministry of Education of China (No.NCET-12-1035) the Natural Science Foundation of Shanxi Province (Nos.202203021211253 and 20210302124473) the Postgraduate Innovation Project of Shanxi Normal University (No.2022XSY022) China Postdoctoral Science Foundation (No.2021M691366) 

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

摘      要：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 *** of a single SMO microstructure provides a promising solution to address this scientific problem due to its controllable *** this study,we control the grain boundary （GB） density of Fe2O3nanomaterials using a simple solvothermal *** have similar chemical compositions and crystal phases,providing an ideal platform for studying the influence of the GB density on the gas-sensing ***-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 ***,when the GB density increased,the response to acetone decreased slightly,whereas the optimal operating temperature *** work highlights the unique performance of the GB density in enhancing the gas sensitivity of a single SMO.