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Zn(OH)F Nanorods for Highly Sensitive NO2 Gas Sensor Applications
Journal of the Korean Physical Society ( IF 0.6 ) Pub Date : 2020-11-20 , DOI: 10.3938/jkps.77.1055
Tae-yil Eom , Joon-Shik Park , Hoo-Jeong Lee

In this study, Zn(OH)F nanorods were synthesized via a microwave-assisted hydrothermal process and employed for NO 2 gas sensor, for the first time. Without adding NH 4 F in the synthesis process, caltrop-like ZnO structure was formed. The characteristics of Zn(OH)F nanorods were characterized by using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS), and compared to those of caltrop-like ZnO. Additionally, the Zn(OH)F nanorods were further systematically studied by annealing them at 250, 350, and 450 °C to examine thermal stability. The Zn(OH)F nanorods start to transform after annealing at 350 °C. The sensor based on the Zn(OH)F nanorods showed very high response of 63.4 toward 1.3 ppm of NO 2 gas at 100 °C, which is 8.6 times higher than the response of the sensor based on the caltrop-like ZnO. In addition, the sensor based on Zn(OH)F nanorods showed an excellent selectivity toward H 2 (5 ppm), C 2 H 5 OH (10.6 ppm), NH 3 (10.6 ppm), C 6 H 5 CH 3 (36.2 ppm), and CH 3 COCH 3 (2.8 ppm).

中文翻译:

用于高灵敏度 NO2 气体传感器应用的 Zn(OH)F 纳米棒

在这项研究中,Zn(OH)F 纳米棒是通过微波辅助水热法合成的,并首次用于 NO 2 气体传感器。在合成过程中不添加NH 4 F,形成了菱形ZnO结构。利用X射线衍射(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)和X射线光电子能谱(XPS)对Zn(OH)F纳米棒的特性进行了表征,并与类菱形氧化锌。此外,通过在 250、350 和 450 °C 下对其进行退火以检查热稳定性,进一步系统地研究了 Zn(OH)F 纳米棒。Zn(OH)F 纳米棒在 350 °C 退火后开始转变。基于 Zn(OH)F 纳米棒的传感器在 100 °C 下对 1.3 ppm NO 2 气体显示出 63.4 的非常高的响应,即 8。比基于菱角状 ZnO 的传感器的响应高 6 倍。此外,基于 Zn(OH)F 纳米棒的传感器对 H 2 (5 ppm)、C 2 H 5 OH (10.6 ppm)、NH 3 (10.6 ppm)、C 6 H 5 CH 3 (36.2 ppm) 和 CH 3 COCH 3 (2.8 ppm)。
更新日期:2020-11-20
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