ZnO-纳米棒装饰的 WO3 纳米片的异质结，涂有 ZIF-71，用于湿度无关的 NO2 传感,ACS Applied Nano Materials

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ZnO-纳米棒装饰的 WO3 纳米片的异质结，涂有 ZIF-71，用于湿度无关的 NO2 传感
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2023-07-08 , DOI: 10.1021/acsanm.3c01955
Linlin Qian ₁ , Canxiang Fang ₂ , Yanghai Gui ₁ , Kuan Tian ₁ , Huishi Guo ₁ , Dongjie Guo ₁ , Xiang Guo ₂ , Peng Liu ₃

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NO ₂是一种非常危险的有毒气体，在高湿度环境下容易产生酸雨，因此准备实时监测和抗湿度的NO ₂传感器至关重要。WO ₃纳米材料通常用于检测NO ₂，但其较差的耐湿性仍然是其应用的关键限制。原位生长法制备的ZnO纳米棒修饰的WO ₃纳米片涂覆ZIF-71（ZnO@ZIF-71/WO _{3 ）复合材料表现出优异的气敏性能和良好的NO}₂检测抗湿性。与WO ₃纳米片和ZnO纳米棒修饰的WO ₃纳米片（ZnO/WO₃）在陶瓷基板上原位生长的异质结复合材料，ZnO@ZIF-71/WO ₃表现出优异的选择性、良好的长期稳定性以及在180℃下对100 ppm NO ₂约947.96的极高响应，即3.07比ZnO/WO ₃传感器高1倍，比纯WO ₃传感器高4.59倍。_{即使在85%的相对湿度下，ZnO@ZIF-71/WO 3}对NO ₂的响应也基本保持恒定。_{功能性ZIF-71层不仅提高了ZnO@ZIF-71/WO 3}的耐湿性，而且增强了对NO ₂的灵敏度和选择性性能在低工作温度下。ZnO@ZIF-71/WO ₃传感器在室温下仍能提供88.41至100 ppm NO ₂的响应。

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Heterojunctions of ZnO-Nanorod-Decorated WO3 Nanosheets Coated with ZIF-71 for Humidity-Independent NO2 Sensing

NO₂ is a very dangerous and toxic gas and is prone to cause acid rain in high humidity environments, so it is essential to prepare a real-time monitoring and humidity immunity NO₂ sensor. WO₃ nanomaterials are commonly applied to detect NO₂, but their poor immunity to humidity is still a critical limitation for the application. ZnO-nanorod-decorated WO₃ nanosheets coated with ZIF-71 (ZnO@ZIF-71/WO₃) composites prepared by an in situ growth method displayed excellent gas sensing performance and good humidity immunity to detect NO₂. Compared to WO₃ nanosheets and ZnO-nanorod-decorated WO₃ nanosheets (ZnO/WO₃) heterojunction composites grown on ceramic substrates in situ, ZnO@ZIF-71/WO₃ presented excellent selectivity, good long-term stability, and a remarkably high response of about 947.96 to 100 ppm NO₂ at 180 °C, which is 3.07 times higher than that of the ZnO/WO₃ sensor and 4.59 times higher than that of the pure WO₃ sensor. Even at a relative humidity of 85%, the response of ZnO@ZIF-71/WO₃ to NO₂ remained essentially constant. The functional ZIF-71 layer not only improved the humidity immunity of ZnO@ZIF-71/WO₃ but also enhanced the sensitivity and selectivity performance to NO₂ at low operating temperatures. The ZnO@ZIF-71/WO₃ sensor still provided a response of 88.41 to 100 ppm NO₂ at room temperature.

更新日期：2023-07-08

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