VOLTAMMETRIC DETERMINATION OF CATECHOL AT A SONOGEL-CARBON ELECTRODE IN THE PRESENCE OF COMMON INTERFERENTS

摘要

A newly developed sonogel-carbon electrode was prepared by coating it with a TiO2 sol-gel and heating at high temperatures. The electrochemical response of the newly developed sonogel-carbon electrode modified with TiO2 was compared to that of an unmodified sonogel-carbon electrode. The modified electrode showed marked enhanced detection of catechol in the presence of ascorbic acid. Also the stability of an sonogel-carbon electrode modified with TiO2 was compared to an electrochemically prepared conducting poly(3-methylthiophene) electrode in the detection of catechol over 25 scans. The sonogel-carbon electrode modified with TiO2 was more stable over repetitive scans. This new modified titanium oxide electrode surface could be used in several chemical sensor applications of environmental and biological interest.