Journal
SOLID STATE IONICS
Volume 360, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.ssi.2020.115544
Keywords
Zinc oxide; Morphology control; Composite material; Photoexcited sensor; Gas sensor
Categories
Funding
- Innovation and entrepreneurship project for overseas high-level talents of Shenzhen [KQJSCX20180328165437711]
- Guangdong Province Covid-19 Pandemic Control Research Fund [2020KZDZX1223]
- Key Program of Natural Science Foundation of Shenzhen [JCYJ20200109113410174]
- key technique improvement of Xinjiang Licorice planting and quality control of Bingtuan [2018AB012]
- National Natural Science Foundation of China [81973280]
- Science and Technology Innovation Talents Program of Bingtuan [2019CB025]
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This review focuses on the application of ZnO-based gas sensors, the possible sensing mechanism of n-type ZnO materials, strategies for enhancing sensitivity and selectivity, current challenges, and future research interests and directions.
The release of toxic and harmful gases seriously endangers human health and social and environmental safety. Sensitive determination of these gases is urgently needed to meet the demands of people and society. ZnO-based gas sensors have been widely used due to fast response, low detection limit, high selectivity, reliable performance and low manufacturing cost. In this review, we highlight the possible sensing mechanism of n-type ZnO materials, and discuss various strategies for enhancing sensitivity and selectivity of ZnO-based gas sensing materials, including regulation of the material morphology, composite of materials, photoexcitation, etc. Then, the current challenges of ZnO-based gas sensing materials are outlined, followed with the future research interests and directions of these materials.
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