材料科学
纳米颗粒
吸附
异质结
纳米技术
检出限
化学工程
密度泛函理论
光电子学
化学
物理化学
色谱法
工程类
计算化学
作者
Wenlei Zhang,W.M. Wang,Yun-Fan Wang,Lei Sun,Yongjiao Sun,Jie Hu
标识
DOI:10.1016/j.apsusc.2023.157957
摘要
The continuous discharging of nitrogen dioxide (NO2) significantly damaged global environment and human health. In this study, SnS2 microflowers/Ti3C2 MXene heterostructure was modified by Au nanoparticles (AuNPs) for the detection of NO2 at room temperature. The microcomposite decorated with 6 wt% AuNPs exhibited excellent sensing properties including response value of 5.34 to 1 ppm NO2, which was almost 5 times higher than that of undecorated one. The limit of detection lowered from 500 ppb to 5 ppb with the addition of AuNPs. Besides, the AuNPs decorated SnS2/MXene microcomposite revealed good selectivity, fatigue resistance, as well as potential application towards flexible sensing. The NO2 gas sensing mechanism of AuNPs decorated with SnS2/Ti3C2 MXene microcomposite was discussed through density functional theory calculation on adsorption behavior and transferred charges in detail. This work may provide an important pathway for the future development of NO2 sensors at room temperature.
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