Pompon-Like Ni Doped Zno Mesoporous Microspheres with Superior No2 Sensing Properties at Room Temperature

作     者：Fu, Yuehao Wang, Hong Liu, Di Wan, Jiawei Zeng, Zhipeng 

作者机构：School of Materials Science and Engineering Sichuan University of Science & Engineering Zigong643000 China Material Corrosion and Protection Key Laboratory of Sichuan Province Sichuan University of Science & Engineering Zigong643000 China Department of Chemistry Tsinghua University Beijing100084 China State Key Laboratory of Biochemical Engineering CAS Center for Excellence in Nanoscience Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China 

出 版 物：《SSRN》 

年 卷 期：2023年

核心收录：

主　　题：Room temperature 

摘      要：Rapid detection of NO2 at room temperature plays a significant role in industrial production and daily life. Herein, the hierarchical pompon-like Ni doped ZnO (Ni-ZnO) mesoporous microspheres composed of abundant porous nanosheets were prepared by a facile solvothermal method. For Ni-ZnO composites based sensors, Ni doping not only reduced their working temperature but also enhanced their sensitivity. The test results suggested that the Ni-ZnO-0.03 based sensor showed outstanding gas-sensing properties toward 20 ppm NO2 at 25°C, such as high response (263), speedy response-recovery time (36, 94 s), excellent selectivity and long-term stability. Moreover, the sensor also possessed a low theoretical detection limit of 9 ppb toward NO2 at 25°C. The superior NO2 sensing properties of Ni-ZnO nanostructure composites could owe to the hierarchical and mesoporous structure, high specific surface area as well as increased oxygen vacancies. © 2023, The Authors. All rights reserved.