新型本征二维GeO_(2)对SF_(6)分解气体的吸附及电子特性研究

Adsorption of SF_(6) decomposed gases and its electronic properties on a novel pristine two-dimensional GeO_(2)

六氟化硫(SF_(6))因其优异的绝缘特性,在高压绝缘设备中广泛应用。高压绝缘设备在长期运行中会面临绝缘老化的问题,这会降低能源电力设备的稳定性和安全性。当局部放电发生时,SF_(6)在高压和高温环境下会分解产生多种组分,如二氧化硫(SO_(2))、硫酰氟(SO_(2)F_(2))、氟化氢(HF)、硫化氢(H_(2)S)等。基于第一性原理,提出了一种新型二维半导体本征二氧化锗(GeO_(2))单分子层材料,对SF_(6)的分解气体具有较强的吸附能力。结果表明,单层本征GeO_(2)分子层在吸附过程中具备理想的电荷转移量和功函数。通过新型二维GeO_(2)半导体气敏材料检测SF_(6)气体中的分解组分,可以及时了解高压绝缘设备的运行状态和绝缘老化程度,对于维护电力系统的可靠性和稳定性至关重要。

SF_(6) is widely used in high-voltage insulated equipment due to its excellent insulating properties.High-voltage insulated equipment faces the problem of insulation aging during its long-term operation,which can reduce the stability and safety of energy power equipment.When partial discharge occurs,SF_(6) decomposes under high-voltage and temperature into various species,such as SO_(2),SO_(2)F_(2),HF,and H_(2)S.Based on the first principle,a novel two-dimensional semiconductor pristine GeO_(2) monomolecular layer,which has a strong adsorption capacity for SF_(6) decomposed gases,is proposed in this study.Results show that this pristine GeO_(2) monomolecular layer provides an ideal amount of charge transfer and work function during the adsorption process.The detection of the SF_(6) decomposed gases by the novel two-dimensional GeO_(2),which is a gas-sensitive semiconductor material,allows us to identify the operational status and degree of insulation of high-voltage insulated equipment,which is crucial for maintaining the reliability and stability of power systems.