Abstract Carbon fiber (CF) and boron doped diamond/carbon fiber (BDD/CF) were applied as anodes for the Brilliant Green dye electrochemical degradation process. CF substrates were obtained from polyacrylonitrile precursor heat treated at 1000 °C in a nitrogen atmosphere. BDD films were grown on CF substrates by hot filament chemical vapor deposition with boron source from an additional hydrogen line passing through a bubbler containing B2O3 dissolved in methanol solution with B/C ratio of 15,000 ppm. The electrodes were characterized by field emission gun-scanning electron microscopy images, Raman spectroscopy, and electrochemical impedance spectroscopy showing notable tridimensional characteristics besides their high diamond quality. They were applied to electrochemical degradation of Brilliant Green dye at different current densities using a concentration of 100 mg L−1. Their electrolysis efficiency was analyzed by UV/Vis spectrophotometry technique. The results showed that BDD/CF electrodes were efficient in the solution color removal, regardless of the current density value. BDD/CF electrode under the lowest current density of 10 mA·cm−2 presented the best performance with higher kinetic constant and color removal percentage associated to its low energetic consumption.

中文翻译：

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掺硼金刚石/碳纤维复合材料作为阳极在亮绿染料电化学降解中的奇异性能

摘要 碳纤维（CF）和掺硼金刚石/碳纤维（BDD/CF）被用作亮绿染料电化学降解过程的阳极。CF 基板由聚丙烯腈前体在氮气氛中在 1000°C 下热处理获得。BDD 薄膜通过热灯丝化学气相沉积在 CF 基板上生长，硼源来自额外的氢管线，通过一个含有溶解在甲醇溶液中的 B2O3 的鼓泡器，B/C 比为 15,000 ppm。电极通过场发射枪扫描电子显微镜图像、拉曼光谱和电化学阻抗光谱进行表征，除了其高金刚石质量外，还显示出显着的三维特征。使用 100 mg L-1 的浓度将它们应用于不同电流密度下亮绿染料的电化学降解。通过紫外/可见分光光度法技术分析它们的电解效率。结果表明，无论电流密度值如何，BDD/CF 电极都能有效去除溶液颜色。BDD/CF 电极在 10 mA·cm-2 的最低电流密度下表现出最佳性能，具有更高的动力学常数和与其低能量消耗相关的颜色去除百分比。