Electrodepositing Polyaniline by Pulse Galvanostatic Method

Abstract

Abstract: A new method, pulse galvanostatic method(PGM) is proposed to synthesize polyaniline(PANI) films in 0.2 mol/L aniline and 0.5 mol/L H₂SO₄ aqueous solution. Cyclic voltammogram in 0.5 mol/L H₂SO₄ solutions show that the films of PANI obtained by PGM are more electroactive than those by galvanostatic method(GM). The micrograph of polyaniline films has been investigated by scanning electron microscopy. The nano-fibrous structure can be observed for the polyaniline films by PGM, while the polyaniline films by GM show a granular structure. Additionally, the influence of t_on/t_off and frequency of PGM on the properties of polyaniline has also been discussed. Electrochemical research shows that the anodic peak current of CVs has a maximum value in the plot of peak current density relating to t_on/t_off. Meanwhile, the peak current increases with the imcrease of frequency.

Key words: Polyaniline, Pulse galvanostatic method(PGM), Galvanostatic method(GM), Cyclic voltmmogram

CLC Number:

TQ150.1

TrendMD:

JIAO Shu-Qiang, PENG Xia-Hui, ZHOU Hai-Hui, CHEN Jin-Hua, KUANG Ya-Fei. Electrodepositing Polyaniline by Pulse Galvanostatic Method[J]. Chem. J. Chinese Universities, 2003, 24(6): 1118.

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Electrodepositing Polyaniline by Pulse Galvanostatic Method

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