Design of narrow bandgap Fe_(2)O_(3)/MoO_(3) heterostructure for boosting triethylamine sensing performance  

作　　者：Shuai Zhang Qi Wang Peng Song 

机构地区：[1]School of Material Science and Engineering,University of Jinan,Jinan 250022,China

出　　处：《ChemPhysMater》2024年第3期284-292,共9页化学物理材料（英文）

基　　金：supported by National Natural Science Foundation of China(Nos.61102006 and 51803109);Natural Science Foundation of Shandong Province,China(ZR2022MF234 and No.ZR2018LE006).

摘　　要：To achieve the rapid and real-time detection of triethylamine(TEA)gas,this study synthesized a gas sensor based on heterostructures of Fe_(2)O_(3)/MoO_(3) using a hydrothermal method.Fe_(2)O_(3)/MoO_(3) composites with a narrow bandgap(1.1 eV)were successfully synthesized by constructing heterostructures.The rapid and efficient detection of triethylamine was achieved at 220℃.The response and response/recovery times of the Fe_(2)O_(3)/MoO_(3) sensor with 50×10^(−6) triethylamine were 132 s and 5 s/10 s,respectively.The Fe_(2)O_(3)/MoO_(3) sensor maintained a good response to triethylamine gas,even at 80%relative humidity.The sensing mechanism of the Fe_(2)O_(3)/MoO_(3) sensor can be described in terms of adsorption energy and electronic behavior of the sensing layer using density functional theory(DFT).The results are consistent with the excellent selectivity and rapid response/recovery of the Fe_(2)O_(3)/MoO_(3) gas sensor for triethylamine.Therefore,the construction of heterostructures to facilitate electron transmission is an effective strategy to achieve rapid detection of triethylamine and is worthy of further exploration and investigation.

关 键 词：Fe_(2)O_(3)/MoO_(3) HETEROSTRUCTURE TRIETHYLAMINE DFT Narrow bandgap 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]