Qi Beiying, Wang Xinchang, Wang Xinyue, Cheng Jipeng, Shang Yuanyuan
Key Laboratory of Material Physics of Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450052, China.
State Key Laboatory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China.
Nanomaterials (Basel). 2022 Jul 27;12(15):2579. doi: 10.3390/nano12152579.
Metal-organic framework (MOF)-derived pure ZnO and Cu-doped ZnO nanocages were fabricated by calcining a zeolitic imidazole framework (ZIF-8) and Cu-doped ZIF-8. The morphology and crystal structure of the samples were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), and high-resolution transmission electron microscopy (HRTEM). It was found that Cu doping did not change the crystal structures and morphologies of MOF-derived ZnO nanocages. The HS-sensing properties of the sensors based on ZnO and Cu-doped ZnO nanocages were investigated. The results indicated that the HS-sensing properties of MOF-derived ZnO nanocages were effectively improved by Cu doping, and the optimal doping content was 3 at%. Moreover, 3 at% Cu-doped ZnO nanocages showed the highest response of 4733 for 5 ppm HS at 200 °C, and the detection limit could be as low as 20 ppb. The gas-sensing mechanism was also discussed.
通过煅烧沸石咪唑框架（ZIF-8）和铜掺杂的ZIF-8制备了金属有机框架（MOF）衍生的纯ZnO和铜掺杂的ZnO纳米笼。使用X射线衍射（XRD）、扫描电子显微镜（SEM）和高分辨率透射电子显微镜（HRTEM）对样品的形貌和晶体结构进行了表征。发现铜掺杂并未改变MOF衍生的ZnO纳米笼的晶体结构和形貌。研究了基于ZnO和铜掺杂的ZnO纳米笼的硫化氢传感性能。结果表明，铜掺杂有效改善了MOF衍生的ZnO纳米笼的硫化氢传感性能，最佳掺杂量为3原子%。此外，3原子%铜掺杂的ZnO纳米笼在200℃下对5 ppm硫化氢的响应最高可达4733，检测限可低至20 ppb。还讨论了气敏机理。
