Electrochemical Detection of Catechol Based on As-Grown and Nanograss Array Boron-Doped Diamond Electrodes

The electrochemical behavior of different redox systems and detection of catechol were performed oil the as-grown boron-doped diamond (BDD) electrodes and the nanograss array BDD. Compared with as-grown BDD, the electron transfer oil the nanograss array BDD surface became slower toward the negatively charged Fe(CN)(6)(3-), whereas changed little toward the positively charged Ru(NH3)(6)(3+). The nanograss at-ray BDD showed higher electrocatalytic activity toward the catechol detection than did the as-grown BDD. Good linearity was observed for a concentration range from 5 to 100 mu M with a sensitivity of 719.71 mA M-1 cm(-2) and a detection limit of 1.3 mu M oil the nanograss array BDD.