A Fast Response Ammonia Sensor Based on Coaxial PPy-PAN Nanofiber Yarn.
Highly orientated polypyrrole (PPy)-coated polyacrylonitrile (PAN) (PPy-PAN) nanofiber yarn was prepared with an electrospinning technique andin-situchemical 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.
Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles, Donghua University, No. 2999 North Renmin Road, Songjiang District, Shanghai 201620, China. lph_1989@sina.com.
Penghong
P
Liu
Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles, Donghua University, No. 2999 North Renmin Road, Songjiang District, Shanghai 201620, China. wushaohua87@163.com.
Shaohua
S
Wu
Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles, Donghua University, No. 2999 North Renmin Road, Songjiang District, Shanghai 201620, China. zhangyue1989@163.com.
Yue
Y
Zhang
Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles, Donghua University, No. 2999 North Renmin Road, Songjiang District, Shanghai 201620, China. hnzhang@dhu.edu.cn.
Hongnan
H
Zhang
Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles, Donghua University, No. 2999 North Renmin Road, Songjiang District, Shanghai 201620, China. xhqin@dhu.edu.cn.
Xiaohong
X
Qin
ammonia sensor; coaxial polypyrrole (PPy)–polyacrylonitrile (PAN) nanofiber yarn; electrospinning; polypyrrole