Research on Pd-MoSe2 sensor for detecting NO2 gas in air insulation breakdown
Real-time detection of NO2,the decomposition gas of insulation defects in the production process of air-insulated power equipment,is crucial to ensure the safe production of power systems.MoSe2 is a two-dimensional material with potential for gas sensor applications.This paper proposes a gas sensing method for detecting NO2 in air-insulating decomposition gases by employing Pd-doped MoSe2.The method addresses issues of low response,slow recovery,and high power consumption in current NO2 sensors.It investigates the gas-sensitive response characteristics of intrinsic MoSe2 gas sensors and Pd-MoSe2 gas sensors to NO2,based on a built gas-sensitive response test platform.The adsorption parameters of NO2 on the MoSe2 crystal surface and its adsorption behaviors are calculated by employing the first nature principle.Our gas-sensitive characterization tests show the Pd-MoSe2 gas-sensitive sensor has a response value of 3.95 to 20 μL/L NO2 at room temperature.The response and recovery time stand at 38s and 46s respectively,enabling effective detection of 2 μL/L NO2.Our theoretical calculations indicate NO2 adsorption on intrinsic MoSe2 is weak physisorption,while Pd-MoSe2 exhibits strong chemisorption.Our results may provide some valuable references for high-performance MoSe2 gas sensors and their application in NO2 online monitoring.
air insulation decomposition gasMoSe2NO2gas sensor
国家科技期刊平台
NSTL
万方数据
