【摘要】 环境中低体积分数的NO₂气体将对人体产生较大危害，因此实现NO₂高灵敏检测具有重要意义。金属氧化物半导体气体传感器是主要的NO₂气体检测方法，但高的功耗难以满足物联网和可穿戴技术发展需求。Bi₂S₃材料具有窄的带隙结构和高的载流子迁移率，是理想的室温NO₂敏感材料。本文采用一步水热法合成Bi₂S₃微球，制得的Bi₂S₃传感器可实现（0.1～1）×10^-6体积分数的NO₂气体室温检测，对1×10^-6体积分数的NO₂,检测灵敏度为1.66,响应/恢复时间为71/244 s,具有良好的选择性、重复性和稳定性，在低体积分数NO₂室温检测具有应用前景。更多还原

【Abstract】 NO₂ is harmful gas to human health even at a low volume fraction.Therefore, realization of highly sensitive detection of NO₂ gas is of great practical significance.Metal oxide semiconductor gas sensors are the main NO₂ gas detection method, but their high power consumption makes it difficult to meet the development needs of the internet of things and wearable technology.Bi₂S₃ material shows a narrow bandgap and a high carrier mobility, making it as ideal room temperature NO₂ senstive material.Bi₂S₃ microspheres are prepared by one-step hydrothermal method, and the sensor based on the Bi₂S₃ microspheres can realize NO₂ gas detection of volume fraction range of 0.1×10^-6～1×10^-6 at room temperature.When the volume fraction of NO₂ is 1×10^-6,detection sensitivity is 1.66,and the response/recovery time is 71/244 s, respectively.It has good selectivity, repeatability, and stability, and has application prospect in low volume fraction NO₂ detection at room temperature.更多还原