Synthesis of ultra-fine conducting polyaniline micro/nanotubes using fiber template and their NH3 gas sensitivity.
We have recently fabricated ultra-fine conducting polyaniline (PANI) tubes with high gas sensitivity. This route includes two steps. Firstly, aniline polymerizes on the surface of a suitable fiber template prepared by electrospun nitrocellulose (NC). Then, the NC fiber template is dissolved and the ultra-fine PANI tubes are obtained. The structure of the conducting PANI tubes is characterized by IR spectrum and wide-angle X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The results indicate that the PANI shows the shape of ultra-fine tubes with average inner diameter of 250-350 nm. The wall thickness of the ultra-fine PANI tubes increases with increasing the content of oxidant. The conductivity of the doped PANI tubes is about 6.9 x 10(-2) S. The results of gas sensitivity of the ultra-fine PANI tubes indicate that the PANI tubes can act as "electronic nose" to detect toxic NH3 gas below 20 ppm.
Xue
Bo
B
Key Laboratory of Polyoxometalates Science of Ministry of Education, Northeast Normal University, Changchun 130024, PR China.
Qi
Shaoyan
S
Gong
Jian
J
Gao
Yu
Y
Yao
Shuang
S
Yin
Rong
R
Qu
Lunyu
L