Ren Xiaowei, Xu Ze, Zhang Zhongtai, Tang Zilong
State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China.
Nanomaterials (Basel). 2022 Oct 23;12(21):3726. doi: 10.3390/nano12213726.
Nitrogen dioxide (NO) is the major reason for acid rain and respiratory illness in humans. Therefore, rapid, portable, and effective detection of NO is essential. Herein, a novel and simple method to construct a ZnO-SnO heterojunction is fabricated by pyrolysis of bimetallic metal organic frameworks. The sensitivity of ZnO-SnO heterojunction towards 0.2 ppm NO under 180 °C is 37, which is 3 times that of pure ZnO and SnO. The construction of heterojunction speeds up the response-recovery process, and this kind of material exhibits lower detection limit. The construction of heterojunction can significantly improve the NO sensitivity. The selectivity, stability, and moisture resistance of ZnO-SnO heterojunction are carried out. This could enable the realization of highly selective and sensitive portable detection of NO.
二氧化氮（NO）是酸雨和人类呼吸道疾病的主要成因。因此，快速、便携且有效地检测NO至关重要。在此，通过双金属有机金属框架的热解制备了一种构建ZnO-SnO异质结的新颖且简单的方法。ZnO-SnO异质结对180℃下0.2 ppm NO的灵敏度为37，是纯ZnO和SnO的3倍。异质结的构建加快了响应-恢复过程，并且这种材料具有更低的检测限。异质结的构建可显著提高对NO的灵敏度。对ZnO-SnO异质结的选择性、稳定性和耐湿性进行了研究。这能够实现对NO的高选择性和灵敏的便携式检测。
