Flower-like Hydroxyfluoride-Sensing Platform toward NO 2 Detection

作者：Xingyu Yao, Jinbo Zhao, Zhidong Jin, Zhen Jiang, Dongmei Xu, Fenglong Wang, Xiaomei Zhang, Haixiang Song, Duo Pan, Yunxia Chen, Renbo Wei, Zhanhu Guo, Jiurong Liu, Nithesh Naik, Rutao Wang, Lili Wu · 发表于：ACS Applied Materials & Interfaces · 年份：2021 · DOI：10.1021/acsami.1c02176 · 被引用次数：56 · 研究领域：Gas Sensing Nanomaterials and Sensors、Analytical Chemistry and Sensors、Advanced Chemical Sensor Technologies

We report for the first time using zinc hydroxyfluoride (ZnOHF) for efficient NO 2 gas detection. The prepared ZnOHF had a unique flower-like architecture self-assembled by nanorods with a diameter of 150 nm and length of 2–3 μm. The sensing performance toward NO 2 detection indicated that the prepared ZnOHF exhibited high response (82.71), short response/recovery time (13 s/35 s) to 10 ppm of NO 2, and excellent selectivity at 200 °C, greatly outperforming the ZnO raw material. ZnOHF could work in a wide detection window ranging from 100 ppb to 50 ppm, implying its practical application prospects in both industry and daily life. The excellent sensing behavior of ZnOHF originated mainly from the negligible oxygen ions adsorbed on the material surface, which was caused by the higher work function of ZnOHF. Therefore, almost all conduction band electrons can be used in the NO 2 gas sensing.