EQCM Studies of Electropolymerization and Electrochemically Controlled Phenol Separation of Polyaniline Film

作者：Li Hui; Li Yue; Hao Xiao Gang^*; Zhang Zhong Lin; Liu Shi Bin

来源：Chemical Journal of Chinese Universities, 2011, 32(7): 1645-1650.

• Conducting polyaniline
• Electrochemical quartz crystal microbalance(EQCM)
• Phenol
• Electrochemically controlled separation

Electroactive polyaniline (PANT) thin films were synthesized on platinum substrates by electrochemical polymerization, the electrochemical quartz crystal microbalance(EQCM) technique was adopted to investigate the polymerization process of the PANT film and its redox behavior in phenol solution. Combined with cyclic voltammetry(CV), electroactivity and stability of the PANT film cycled between the reduced, leu-coemeraldine(L) state and the half-oxidized, emeraldine(E) state or between L and the fully oxidized, pemigraniline(P) state were investigated in 0. 5 mol/L H(2)SO(4) solution. In mixed solutions of phenol and H(2)SO(4), chronocoulometry and FTIR were also used to investigate the electrochemically controlled phenol separation property of PANI film. Experimental results indicate that the abrupt changes of the film mass exist during the redox switching of PANT with the ion ejection/injection, especially with the increase of the films thickness; and PANI films have good electroactivity and stability when films are controlled between L and E during cycling process. Phenol in electrolyte will enter into the film when PANT is controlled as E, while release from the film into electrolyte again when PANI is modulated to L. Phenol enter or release from film can controlled freely by modulating the potential of PANT films, this characteristic can be used to separate the phenol from the solution.

• 出版日期2011-7-10
• 单位太原理工大学