An Electrochemical Study on Self-Doped Polyaniline Copolymers and Their Composites with Multi-walled Carbon Nanotubes

• Main Authors: Jeng-Ji Jung, 鍾政吉
• Other Authors: Rong-Hsien Lin
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/84825569539183170317

碩士 === 國立高雄應用科技大學 === 化學工程與材料工程系 === 98 === Electrochemical copolymerizations on ITO electrode of aniline (AN) and o-aminobenzene sulfonic acid (OSA) with three different mole ratios containing carbon nanotubes (CNT) and acid-treated CNT (fCNT) were conducted and investigated as biosensing materials by cyclic voltam-metry. The electrocatalytic properties of CNT and fCNT were emphatically investigated in this study via analysis of the electric signals of the composite-modified ITO electrode immersed in potassium ferri-cyanide-containing aqueous solutions of different pH. The results found that the p(25AN-co-75OSA) copolymer having monomers (AN and OSA) mole ratio 25/75 exhibited electrocatalytic property for redox re-actions of hexacyanoferrate ions. The addition of 0.01 wt% CNT or fCNT in the composite enhanced the electrocatalytic properties. In comparison, fCNT exhibited a greater enhancement in anodic peak cur-rent than CNT. The 0.01wt% fCNT-containing composite film could be used to detect dopamine and ascorbic acid with reversible oxidation and reduction currents. This composite-modified electrode exhibited diffu-sion-controlled electron transfer rate via investigation on the voltage scanning rate dependence and the Randles-Sevcik equation.