Luan Van Hoang, Tien Huynh Ngoc, Hur Seung Hyun, Han Jong Hun, Lee Wonoh
School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea.
Department of Chemical Engineering, University of South Carolina, 301 Main Street, Columbia, SC 29208, USA.
Nanomaterials (Basel). 2017 Oct 11;7(10):313. doi: 10.3390/nano7100313.
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.
氧化镍因其具有优异的p型半导体特性和高化学稳定性，已被广泛应用于化学传感领域。在此，我们提出了一种制备三维多孔氮掺杂氧化镍纳米片作为高灵敏度NO₂传感器的新技术。这种精细的纳米结构是通过一种简单有效的水热合成方法制备的。随后，通过氨气热处理实现氮掺杂。当在三维纳米结构中引入p型掺杂剂，即氮原子时，基于氧化镍纳米片的传感器表现出相当可观的NO₂传感能力，与未掺杂的氧化镍基传感器相比，响应度和灵敏度提高了两倍。
