检出限
选择性
异质结
丁酮
钙钛矿(结构)
材料科学
重复性
热液循环
纳米技术
化学
催化作用
化学工程
光电子学
色谱法
有机化学
溶剂
工程类
作者
Fanli Meng,Liyun Qin,Hongliang Gao,Hongmin Zhu,Zhenyu Yuan
标识
DOI:10.1016/j.jallcom.2023.172464
摘要
LaFeO3 material with excellent performance and unique perovskite structure has attracted more and more attention in the field of VOC gas detection. However, simultaneously achieving low detection limits and high sensitivity at low temperatures is still a very valuable topic. In this study, LaFeO3-In2O3 material was prepared by hydrothermal method and used to detect 2-butanone gas. Various characterization results displayed that the LaFeO3-In2O3 material was successfully obtained. Compared with the pure In2O3 material, the LaFeO3-In2O3 material had more outstanding gas-sensing properties for 2-butanone. The response value (425) of 1% LaFeO3-In2O3 gas sensor to 100 ppm 2-butanone at 210 ℃ was nearly three times that of pure In2O3. Moreover, the 1% LaFeO3-In2O3 sensor had a very low detection limit (10 ppb), excellent selectivity, repeatability, and long-term stability. The greatly enhanced sensing performance for 2-butanone can be attributed to the heterojunction-induced changes in surface properties and electronic structure, the catalytic effect of LaFeO3, and there is a synergistic effect between these two components. This study provides a very simple synthesis method, which can greatly improve the gas sensing properties of 2-butanone, which is very promising and valuable for industrial production and life.
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