期刊
NANOMATERIALS
卷 6, 期 7, 页码 -出版社
MDPI
DOI: 10.3390/nano6070121
关键词
electrospinning; polypyrrole; coaxial polypyrrole (PPy)-polyacrylonitrile (PAN) nanofiber yarn; ammonia sensor
类别
资金
- National Natural Science Foundation of China [51373033, 11172064]
- Fundamental Research Funds for the Central Universities
- DHU Distinguished Young Professor Program
- Keygrant Project of Chinese Ministry of Education [113027A]
- Sailing Project from the Science and Technology Commission of Shanghai Municipality [14YF1405100]
Highly orientated polypyrrole (PPy)-coated polyacrylonitrile (PAN) (PPy-PAN) nanofiber yarn was prepared with an electrospinning technique and in-situ chemical polymerization. The morphology and chemical structure of PPy-PAN nanofiber yarn was characterized by scanning electron microscopy (SEM), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), and fourier transform infrared spectroscopy (FTIR), which indicated that the PPy as the shell layer was homogeneously and uniformly polymerized on the surface of PAN nanofiber. The effects of different concentration of doping acid on the responses of PPy-PAN nanofiber yarn sensor were investigated. The electrical responses of the gas sensor based on the PPy-PAN nanofiber yarn to ammonia were investigated at room temperature. The nanoyarn sensor composed of uniaxially aligned PPy-PAN nanofibers with a one-dimensional structure exhibited a transient response, and the response time was less than 1 s. The excellent sensing properties mentioned above give rise to good potential application prospects in the field of ammonia sensor.
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