TiO<sub>2</sub> and Ag<sub>2</sub>O Decorated GeTe Monolayer as a Highly Sensitive Material for SF<sub>6</sub> Decomposition Species Detection
Hao Qiao, Xiaobo Zhang, Jian Qiu, Ping Wang, Hao Sun, Xianping Chen, Jiabing Yu, Lu‐Qi Tao
Abstract
The effective detection and maintenance of electrical equipment failures in circuit maintenance is crucial in reducing public property losses. Therefore, the research and development of a highly sensitive SF6 decomposition detection device is of great significance. Here, in this article, the adsorption behavior and sensing characteristics of TiO2, Ag <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$_{{2}}\text{O}$ </tex-math></inline-formula> doped GeTe monolayer for SF6 decomposition species ( <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\text{H}_{{2}}\text{S}$ </tex-math></inline-formula> , SO2) have been studied through first-principles analysis. The results show that the doping of Ag <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$_{{2}}\text{O}$ </tex-math></inline-formula> and TiO2 enhances the conductivity of GeTe monolayer by 14.9% and 16.8%, respectively, and increases the adsorption energy of the doped GeTe monolayer for <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\text{H}_{{2}}\text{S}$ </tex-math></inline-formula> and SO2 by 214% (TiO2–GeTe– <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\text{H}_{{2}}\text{S}$ </tex-math></inline-formula> ), 184% (TiO2–GeTe–SO2), 361% (Ag <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$_{{2}}\text{O}$ </tex-math></inline-formula> –GeTe– <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\text{H}_{{2}}\text{S}$ </tex-math></inline-formula> ), and 191% (Ag <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$_{{2}}\text{O}$ </tex-math></inline-formula> –GeTe–SO2), respectively. The adsorption energy with proper size makes both doped GeTe monolayers highly sensitive and selective with a rapid recovery time, which theoretically solves the problem of industrial recycling of sensing materials. The research results provide a theoretical basis for the material selection of a highly selective sensor for detecting SF6 decomposition products.