Luo Yibing, An Beixi, Bai Jinglong, Wang Yanrong, Cheng Xu, Wang Qiao, Li Jianpeng, Yang Yifan, Wu Zhengkun, Xie Erqing
School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, China.
SZU-NUS Collaborative Center and International Collaborative Laboratory of 2D Materials for Optoelectronic Science & Technology, Engineering Technology Research Center for 2D Material Information Function Devices and Systems of Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China.
J Colloid Interface Sci. 2021 Oct;599:533-542. doi: 10.1016/j.jcis.2021.04.125. Epub 2021 Apr 28.
Hydrogen can be regarded as an ideal type of secondary energy considering its potential for achieving renewable and sustainable development due to water being its sole combustion product and its possible production by solar energy-based water electrolysis. Monitoring the presence and concentration of hydrogen during production, transportation, and application requires a hydrogen gas sensor with high response, high selectivity, and fast response and recovery times. In an attempt to meet these requirements, NiO and PdO are used in the co-doping of InO nanotubes by subsequent electrospinning and impregnation under UV irradiation. The fabricated hydrogen gas sensor demonstrates an ultrahigh response of 487.52, a fast response time of 1 s and high selectivity at an operating temperature of 160 °C, which characteristics are superior to reported monometal-doped hydrogen sensors. The remarkable gas sensing performance could be attributed to the synergistic effect of the resistance modulation, the chemical sensitization of PdO, and the catalytic effect of NiO. This study demonstrates that co-doping of PdO and NiO on InO nanotubes is an effective way to improve hydrogen sensing characteristics more effectively than doping with PdO or NiO alone, and provides a potential application for the fast and accurate detection of hydrogen.
考虑到氢气的唯一燃烧产物是水，并且可以通过基于太阳能的水电解来生产，氢气因其在实现可再生和可持续发展方面的潜力，可被视为一种理想的二次能源类型。在氢气的生产、运输和应用过程中监测其存在和浓度，需要一种具有高响应、高选择性以及快速响应和恢复时间的氢气传感器。为了满足这些要求，通过后续的静电纺丝和在紫外线照射下的浸渍法，将氧化镍（NiO）和氧化钯（PdO）用于氧化铟（InO）纳米管的共掺杂。所制备的氢气传感器在160℃的工作温度下表现出487.52的超高响应、1秒的快速响应时间和高选择性，这些特性优于已报道的单金属掺杂氢气传感器。这种卓越的气敏性能可归因于电阻调制的协同效应、PdO的化学敏化作用以及NiO的催化作用。本研究表明，在InO纳米管上共掺杂PdO和NiO比单独掺杂PdO或NiO更有效地改善氢气传感特性的有效方法，并为氢气的快速准确检测提供了潜在应用。
