【摘要】 为检测大气污染物NO₂，试验制备了一种多孔气敏材料，用于制备便携式NO₂气体检测的传感器，并对其性能进行研究。结果表明，多孔气敏材料具备较大的比表面积和内部多孔结构，气敏性能良好；多孔气敏材料传感器最佳测试温度为200℃，响应恢复效果良好，且对NO₂气体具有选择性，最低NO₂气体测试质量浓度为0.05 mg/m³，响应度能达到1.25左右；在制备完成第60 d时依然气敏性能良好，使用寿命长。使用多孔气敏材料制备的便携式NO₂气体检测传感器，具备优良的NO₂气体检测性能，符合环境气体检测标准，可以作为气敏材料制备便携式污染物传感器。更多还原

【Abstract】 In To detect atmospheric pollutant NO₂,a porous gas sensing material was prepared for the preparation of a portable NO₂ gas detection sensor,and its performance was studied.The experimental results showed that the po‐rous gas sensitive material had a large specific surface area and an internal porous structure,with good gas sensing performance.The optimal testing temperature for porous gas sensors was 200℃,with good response recovery effect and selectivity for NO₂ gas.The minimum test concentration for NO₂ gas was 0.05 mg/m³,and the response could reach about 1.25.Even after the 60 th day of preparation,the gas sensing performance was still good and the service life was long.The portable NO₂ gas detection sensor prepared using porous gas sensitive materials had excellent NO₂gas detection performance and met environmental gas detection standards.It can be used as a gas sensitive material to prepare portable pollutant sensors.更多还原