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Open AccessArticle

Three-Dimensional Porous Nitrogen-Doped NiO Nanostructures as Highly Sensitive NO2 Sensors

1
School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea
2
Department of Chemical Engineering, University of South Carolina, 301 Main Street, Columbia, SC 29208, USA
3
School of Chemical Engineering and Bioengineering, University of Ulsan, 93 Daehak-ro, Nam-gu, Ulsan 44610, Korea
4
School of Chemical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea
*
Author to whom correspondence should be addressed.
Nanomaterials 2017, 7(10), 313; https://doi.org/10.3390/nano7100313
Received: 11 September 2017 / Revised: 2 October 2017 / Accepted: 8 October 2017 / Published: 11 October 2017
(This article belongs to the Special Issue Nanomaterials for Sensing Applications)
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. View Full-Text
Keywords: sensor; porous nanostructure; nickel oxide; nitrogen doping; NO2 gas sensor sensor; porous nanostructure; nickel oxide; nitrogen doping; NO2 gas sensor
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MDPI and ACS Style

Luan, V.H.; Tien, H.N.; Hur, S.H.; Han, J.H.; Lee, W. Three-Dimensional Porous Nitrogen-Doped NiO Nanostructures as Highly Sensitive NO2 Sensors. Nanomaterials 2017, 7, 313.

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