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

doi:10.1021/acsami.1c02176

Flower-like Hydroxyfluoride-Sensing Platform toward NO₂ Detection

ACS Appl Mater Interfaces. 2021 Jun 9;13(22):26278-26287. doi: 10.1021/acsami.1c02176. Epub 2021 May 28.

Authors

Xingyu Yao¹, Jinbo Zhao², Zhidong Jin¹, Zhen Jiang¹, Dongmei Xu¹, Fenglong Wang¹, Xiaomei Zhang³, Haixiang Song⁴, Duo Pan⁵, Yunxia Chen⁶, Renbo Wei⁷, Zhanhu Guo⁵, Jiurong Liu¹, Nithesh Naik⁸, Rutao Wang¹, Lili Wu¹

Affiliations

¹ Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education and School of Materials Science and Engineering, Shandong University, Jinan, Shandong 250061, China.
² School of Materials Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong 250353, China.
³ School of Chemistry and Chemical Engineering, Shandong University, Jinan, Shandong 250100, China.
⁴ Henan Joint International Research Laboratory of Nanocomposite Sensing Materials, School of Chemical and Environmental Engineering, Anyang Institute of Technology, Anyang 455000, China.
⁵ Integrated Composites Laboratory (ICL), Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee 37966, United States.
⁶ School of Mechanical Engineering, Shanghai Dianji University, Shanghai 201306, China.
⁷ School of Chemical Engineering, Northwest University, Xi'an 710069, China.
⁸ Department of Mechanical & Manufacturing Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India.

PMID: 34047540
DOI: 10.1021/acsami.1c02176

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.

Keywords: NO2; ZnOHF; electronic affinity; gas sensors; surface adsorption oxygen.