期刊
ACS OMEGA
卷 7, 期 24, 页码 21043-21051出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsomega.2c01828
关键词
-
资金
- O ffi ce of Science & Technology and Talent Work of Luzhou [2021-JYJ-92]
- Chongqing Technology and Business Institute project [ZZ2020-06]
This study analyzed the gas sensitivity of Ag2O/CuO-modified SnS2 based on density functional theory, finding that NH3, Cl-2, and C2H2 gases were chemisorbed on the modified SnS2 surfaces, with Ag2O-SnS2 suitable as an NH3 gas sensor and CuO-SnS2 more suitable as a C2H2 gas sensor.
In this paper, based on density functional theory, the adsorption mechanism and gas sensitivity of Ag2O/CuO-modified SnS2 were analyzed. The results were analyzed according to the adsorption energy, total density of states, partial density of states, and frontier molecular orbital theory. The results show that the adsorption of all gas molecules is exothermic. NH3, Cl-2, and C2H2 gases are chemisorbed on the modified SnS2 surfaces. After gas adsorption, the energy gap of the base changes by more than 10%, which fully shows that the conductivity changes greatly after gas adsorption, which can be reflected in the macroscopic resistance change. Ag2O-SnS2 is suitable as a gas sensor for NH3 gas sensors in terms of moderate adsorption distance, large adsorption energy, charge transfer, and frontier molecular orbital theory, while CuO-SnS2 is more suitable as a C2H2 gas sensor.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据