This work presents the production, and the characterization of Boron-doped diamond (BDD) films deposited on Titanium (Ti) substrate (BDD/Ti) with different sp~2 contents. The electrooxidation of the dye Reactive Orange 16 (RO16) is studied systematically considering the sp~2 bonds influence. The results for the dye electrochemical degradations were investigated by spectroscopic techniques UV/VIS analysis, Total Organic Carbon (TOC), and High Performance Liquid Chromatography (HPLC). The BDD electrode with the lowest percentage of CH_4 showed the best efficiency for the aromaticity reduction, the reduction of solution color and in the analysis of the TOC. This performance was associated to its best diamond purity. This study also demonstrated that there is a compromise between the conductivity of the films and the increase of bonds sp~2 type.
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