期刊
NANOMATERIALS
卷 7, 期 10, 页码 -出版社
MDPI
DOI: 10.3390/nano7100313
关键词
sensor; porous nanostructure; nickel oxide; nitrogen doping; NO2 gas sensor
类别
资金
- National Research Foundation (NRF) of Korea - Ministry of Science, ICT and Future Planning [2015R1A2A2A04003160, 2016M3A7B4021149]
- National Research Foundation of Korea [2017M3A7B4014045, 22A20130000071, 2015R1A2A2A04003160, 21A20131712412, 2016M3A7B4021149] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Nickel oxide has been widely used in chemical sensing applications, because it has an excellent p-type semiconducting property with high chemical stability. Here, we present a novel technique of fabricating three-dimensional porous nitrogen-doped nickel oxide nanosheets as a highly sensitive NO2 sensor. The elaborate nanostructure was prepared by a simple and effective hydrothermal synthesis method. Subsequently, nitrogen doping was achieved by thermal treatment with ammonia gas. When the p-type dopant, i.e., nitrogen atoms, was introduced in the three-dimensional nanostructures, the nickel-oxide-nanosheet-based sensor showed considerable NO2 sensing ability with two-fold higher responsivity and sensitivity compared to non-doped nickel-oxide-based sensors.
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