Flower-like Hydroxyfluoride-Sensing Platform toward NO2 Detection

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

Research output: Contribution to journalArticlepeer-review

Abstract

We report for the first time using zinc hydroxyfluoride (ZnOHF) for efficient NO2 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 NO2 detection indicated that the prepared ZnOHF exhibited high response (82.71), short response/recovery time (13 s/35 s) to 10 ppm of NO2, 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 NO2 gas sensing.

Original languageEnglish
Pages (from-to)26278-26287
Number of pages10
JournalACS applied materials & interfaces
Volume13
Issue number22
DOIs
Publication statusPublished - 09-06-2021

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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