TY - JOUR
T1 - Study on the doping process of polyaniline in a thermal solution of poly(styrene sulfonic acid)
AU - Hung, Chi Chang
AU - Wen, Ten Chin
N1 - Funding Information:
The authors are grateful to W.R. Tang for her help in some experiments and to Dr. L.M. Huang for his valuable comments. The financial support of this work by the National Science Council of Taiwan under grant NSC-98-2221-E-006-109 is acknowledged.
PY - 2011/3
Y1 - 2011/3
N2 - The doping process of polyaniline (PANI) was investigated in a thermal (80°C) solution of poly(styrene sulfonic acid) (PSS). The in situ UV-vis spectra indicated that the doping process at 80°C was completed in 1200s, which is much faster than that at 25°C. Through a kinetic study, the diffusion coefficient of PSS at 80°C was estimated as 0.37×10-16cm2s-1, which is 132-fold higher than that at 25°C (0.28×10-18cm2s-1). The specific characteristics of PANI doped with PSS (PANI-PSS) were checked using X-ray photoelectron spectroscopy (XPS), Auger electron spectroscopy (AES), cyclic voltammetry (CV), and in situ UV-vis absorption spectroscopy. It was found that the low diffusion rate of PSS at 25°C prevented the release of anions from PANI-PSS even under a negative applied potential. The electrochemical measurements showed that the charge transfer rate and electroactivity of PANI-PSS were much higher than those of PANI-H2SO4 in a neutral solution.
AB - The doping process of polyaniline (PANI) was investigated in a thermal (80°C) solution of poly(styrene sulfonic acid) (PSS). The in situ UV-vis spectra indicated that the doping process at 80°C was completed in 1200s, which is much faster than that at 25°C. Through a kinetic study, the diffusion coefficient of PSS at 80°C was estimated as 0.37×10-16cm2s-1, which is 132-fold higher than that at 25°C (0.28×10-18cm2s-1). The specific characteristics of PANI doped with PSS (PANI-PSS) were checked using X-ray photoelectron spectroscopy (XPS), Auger electron spectroscopy (AES), cyclic voltammetry (CV), and in situ UV-vis absorption spectroscopy. It was found that the low diffusion rate of PSS at 25°C prevented the release of anions from PANI-PSS even under a negative applied potential. The electrochemical measurements showed that the charge transfer rate and electroactivity of PANI-PSS were much higher than those of PANI-H2SO4 in a neutral solution.
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U2 - 10.1016/j.jtice.2010.06.002
DO - 10.1016/j.jtice.2010.06.002
M3 - Article
AN - SCOPUS:78651480506
SN - 1876-1070
VL - 42
SP - 371
EP - 376
JO - Journal of the Taiwan Institute of Chemical Engineers
JF - Journal of the Taiwan Institute of Chemical Engineers
IS - 2
ER -