Strong Adsorption Capacity for SF₆-Leaking Gas With NiO-Doped and Ag₂O-Doped SnSe Monolayer

Abstract

Sulfur hexafluoride (SF <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">6</sub> ) gas is widely used in Gas Insulation Switchgear (GIS) systems of power systems due to its efficient arc extinguishing characteristics. However, long-term equipment operation or electrical faults may cause SF <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">6</sub> insulating gas leakage, leading to environmental pollution. Although there are numerous 2-dimensional materials for detecting SF <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">6</sub> decomposition, few studies on SF <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">6</sub> leakage gas exits. This paper proposes an SF <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">6</sub> adsorbent material based on a SnSe monolayer doped with NiO and Ag <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> O. Theoretical calculations demonstrate that the SnSe monolayer doped with NiO and Ag <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> O exhibits extremely strong adsorption performance for SF <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">6</sub> gas, with adsorption energies of -2.824 eV and -2.812 eV, respectively, which is an 890.88% enhancement compared to pure SnSe monolayer. Furthermore, the adsorption energy of SF <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">6</sub> gas in water solvent exceeds -3.5 eV, indicating that water can serve as an effective enhancer of SF <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">6</sub> gas adsorption. This study provides a new theoretical basis and method for detecting and adsorbing SF <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">6</sub> leaking gas.