journal article·2021-06-09

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

ACS Applied Materials & Interfaces· Volume 13· Issue 22
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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.
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Research context

OpenAlex topics: Gas Sensing Nanomaterials and Sensors · Analytical Chemistry and Sensors · Advanced Chemical Sensor Technologies

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

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

School of Materials Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong 250353, China

School of Chemistry and Chemical Engineering, Shandong University, Jinan, Shandong 250100, China

Henan Joint International Research Laboratory of Nanocomposite Sensing Materials, School of Chemical and Environmental Engineering, Anyang Institute of Technology, Anyang 455000, China

Integrated Composites Laboratory (ICL), Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee 37966, United States

School of Mechanical Engineering, Shanghai Dianji University, Shanghai 201306, China

School of Chemical Engineering, Northwest University, Xi’an 710069, China

Department of Mechanical & Manufacturing Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India

Funding

Ministry of Education of the People's Republic of China · National Natural Science Foundation of China · Natural Science Foundation of Shandong Province

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