检测空气绝缘分解气体NO2的Pd-MoSe2传感器研究
Research on Pd-MoSe2 sensor for detecting NO2 gas in air insulation breakdown
吴宝良 1李谈笑 2杨家隆 1廖一铭 3蒋佳明 4周渠4
作者信息
- 1. 国网重庆市电力公司江津供电分公司,重庆 402260
- 2. 重庆大学-辛辛那提大学联合学院,重庆 400044
- 3. 国网重庆市电力公司合川供电分公司,重庆 401519
- 4. 西南大学 工程技术学院,重庆 400715
- 折叠
摘要
针对目前NO2 传感器响应低、恢复速度慢、功耗高等问题,提出一种用于空气绝缘分解气体NO2 检测的金属钯Pd掺杂MoSe2 基气体传感方法.制备了本征MoSe2 气敏传感器与Pd-MoSe2 气敏传感器,并基于所搭建气敏响应测试平台研究其对NO2 的气敏响应特性,利用第一性原理计算NO2 在MoSe2 晶面上的吸附参数和吸附行为.经过气敏特性测试发现:室温工作时,Pd-MoSe2 气敏传感器对20 μL/L NO2 的响应值为3.95,响应时间和恢复时间分别为38s 和46 s,可实现2 μL/L NO2 的有效检测.理论计算结果表明:本征MoSe2 对NO2 的吸附为弱物理吸附,而Pd-MoSe2 表现为强化学吸附.研究结果可为高性能MoSe2 气体传感器的制备及其在NO2 在线监测中的应用提供借鉴.
Abstract
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.
关键词
空气绝缘分解气体/硒化钼/NO2/气敏传感器Key words
air insulation decomposition gas/MoSe2/NO2/gas sensor引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据