聚吡咯/聚砜复合膜修饰电极的制备及其对对苯二酚的电化学催化性能

采用循环伏安法电化学聚合制备了聚吡咯(PPY)/聚砜(PSF)复合膜修饰电极.结果发现:复合膜的正面(与工作电极接触的一面)是黑色的;而反面(与溶液接触的一面)是白色的.复合膜的表面形态和化学组分分别用SEM和FTIR表征,用电化学循环伏安法对PPY/PSF复合膜修饰电极的电化学催化性能进行了研究.实验结果表明:所得复合膜修饰电极电化学可逆性好并且对对苯二酚有显著的催化效果,其氧化峰电流在5～30mM的范围内与对苯二酚的浓度呈线性关系,表明该复合膜修饰电极在对苯二酚H2Q的监测方面将有潜在的用途.

Preparation of PPY/PSF composite film modified-electrodes and its electrocatalytic activity for hydroquinone

Polypyrrole(PPY)/polysulfone(PSF) composite film modified-electrodes were successfully prepared by electropolymerization using cyclic votammetry technique. It is found that the head-on face (in contact with the working e-lectrode) of the films was black, while the back face of the films was white. The chemical component and the morphology of the composite films were characterized by SEM and FTIR spectra, respectively. While the electrocatalytic activity of the composite film modified electrodes were examined by cyclic voltammetry. It was shown that the composite film modified e-lectrodes have excellent electrochemical reversibility and electrochemical catalytic activity for hydroquinone. Furthermore, the catalytic oxidation peak currents had a linear relationship with the concentration of H2Q in the range from 5mM to 30mM at the scan rate of 20mV·s-1 .This implied that the films had q potential to detect H2Q in aqueous solution.