期刊
APPLIED SURFACE SCIENCE
卷 505, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2019.144533
关键词
1-Butyl-3-methyl tetrafluoroborate; WO3 nanoparticles; Sub-ppm level NO2-sensing; Low temperature detection
类别
资金
- International Science & Technology Cooperation Program of China [2016YFE0115100]
- National Natural Science Foundation of China [21771060, 61271126, 21305033]
Tungsten trioxide (WO3) nanoparticles were synthesized via a fancil hydrothermal method with the addition of small amount of ionic liquid 1-butyl-3-methyl tetrafluoroborate ([Bmim]BF4). The as-synthesized WO3 nanoparticles were calcined at various temperatures to yield final products, which were characterized by X-ray powder diffraction meter (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM), Fourier transform infrared spectra (FT-IR) and N-2 adsorption-desorption methods. The sensor based on WO3 nanoparticles that have been calcined at 500 degrees C for 2 h exhibits an excellent selective response to sub-ppm level NO2 at temperatures less than 50 degrees C. Its resistance to humidity and stability are also good at the same condition. Besides, the detection limit for the gas sensor towards NO2 is 100 ppb. The mechanism of NO2 sensing was characterized and the reasons for improved NO2 sensing performance in WO3 nanoparticles were also proposed.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据