三乙胺
结晶度
制作
纳米材料
热液循环
选择性
材料科学
多孔性
复合数
异质结
电导率
复合材料
化学工程
纳米技术
化学
光电子学
催化作用
工程类
有机化学
医学
替代医学
物理化学
病理
作者
Xianhui Dong,Qing Han,Ya-Ru Kang,Haidong Li,Xinyu Huang,Zheng-Tao Fang,Hongkuan Yuan,Ahmed A. Elzatahry,Zongtao Chi,Guanglei Wu,Wanfeng Xie
标识
DOI:10.1016/j.cclet.2021.06.022
摘要
Owing to their high surface area, stable structure and easy fabrication, composite nanomaterials with encapsulation structures have attracted considerable research interest as sensing materials to detect volatile organic compounds. Herein, a hydrothermal route is designed to prepare foam shaped α-MoO3@SnS2 nanosheets that exhibit excellent sensing performance for triethylamine (TEA). The developed sensor, based on α-MoO3@SnS2 nanosheets, displays a high response of 114.9 for 100 ppm TEA at a low working temperature of 175 °C with sensitivity higher than many other reported sensors. In addition, the device shows a wide concentration detection range (from 500 ppb to 500 ppm), good stability after exposure to air for 80 days, and excellent selectivity. The superior sensing characteristics of the developed sensor are attributed to the high crystallinity of α-MoO3/SnS2, excessive and accessible active sites provided by the good permeability of porous SnS2 shells, and the excellent conductivity of the encapsulation heterojunction structure. Thus, the foam shaped α-MoO3@SnS2 nanosheets presented herein have promising practical applications in TEA gas sensing devices.
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