【摘要】 为了解决纯SnO₂基气体传感器对NO₂灵敏度低、响应时间长的难题，本文采用水热法制备仙人掌状SnO₂/ZnO纳米复合材料，研究了不同配比对SnO₂/ZnO复合材料结构形貌与气敏性能的影响。研究结果表明：在水热反应温度180℃、时间6 h,煅烧温度500℃,时间3 h的条件下，SnO₂/ZnO配比为35∶1时制得仙人掌状SnO₂/ZnO纳米复合材料。NO₂气敏特性结果显示，在工作温度300℃条件下，其对10 ppm NO₂的响应值可达587.503,响应和恢复时间分别为5 s和39 s,较纯SnO₂响应值提升了3.2倍，响应时间缩短了32 s。更多还原

【Abstract】 Pure SnO₂-based gas sensors are low in sensitivity to NO₂ and long in response time.In this study, the hydrothermal method was used to synthesize cactus-like SnO₂/ZnO nanocomposites, the impacts of different ratios on their morphological structure and gas sensing performance were investigated.The results show that the cactus-like SnO₂/ZnO nanocomposite was obtained under the conditions of the water-thermal reaction temperature of 180 °C for 6 hours, the calcination temperature of 500 °C for 3 hours, and the SnO2/ZnO ratio of 35:1.The NO2 gas sensing characteristics demonstrate that, at the operating temperature of 300 ℃, its response value to 10 ppm NO2 is 587.503 and its response time is 5 s and recovery time 39 s.Compared to pure SnO2,its response value increases by a factor of 3.2 and its response time reduces by 32 s.更多还原