目的 研究硼掺杂金刚石（BDD）电极电化学氧化降解活性橙X-GN偶氮染料废水。方法 采用热丝气相沉积法（HFCVD）制备铌基BDD电极，采用SEM观察BDD薄膜的表面形貌，用Raman检测BDD薄膜的成分，用电化学工作站测试BDD电极的电化学性能。选择活性橙X-GN染料废水作为降解对象，分别研究电流密度（20、50、100、150 mA/cm2）、电解质浓度（0.025、0.05、0.1 mol/L）和溶液初始pH（3.78、6.74、10.92）等不同工艺参数对降解效率的影响，并采用紫外可见光分光光度计进行测试表征，使用能耗和总有机碳量表征降解效果。结果 BDD电极具有很好的电催化性能，其电势窗口为3.33 V，析氧电位达到2.45 V，远高于大多数有机物的氧化电位，电极表面反应受扩散步骤控制。结合活性橙X-GN染料溶液降解效果，得出100 mg/L活性橙X-GN溶液的最佳降解工艺参数为：电流密度100 mA/cm2、电解质浓度0.05 mol/L、溶液初始pH值3.78。采用最佳工艺参数处理5 h后，色度移除率达到99%，能耗为65.4 kW?h/m3，TOC去除率达到56.95%。结论 BDD电极可以有效地降解活性橙X-GN染料废水。

The work aims to investigate electrochemical oxidation of reactive brilliant orange X-GN azo dye effluent on boron-doped diamond (BDD) electrode. BDD electrodes were deposited on niobium (Nb) substrates in hot filament chemical vapor deposition (HFCVD) method. The morphology, composition and electrochemical performance of BDD were characterized with scanning electron microscope (SEM), Raman spectroscope and electrochemical workstation. With reactive orange X-GN azo dye effluent as degradation object, effects of different process parameters such as current density (20, 50, 100, 150 mA/cm2), electrolyte concentration (0.025, 0.05, 0.1 M) and initial solution pH (3.78, 6.47, 10.92) on degradation efficiency were evaluated, respectively, and characterized and tested with ultraviolet-visible spectrophotometer. The degradation effect of X-GN was characterized by energy consumption and total organic carbon (TOC). The BDD electrode exhibited excellent electrocatalytic performance. The potential window amounted to 3.33 V, oxygen evolution potential amounted to 2.45 V, well above the oxidation potential of most organic matters. The electrode surface reaction was controlled by diffusion step. Allowing for degradation effects of reactive orange X-GN azo dye effluent, the optimal process conditions for 100 mg/L X-GN were: current density of 100 mA/cm2, electrolyte concentration of 0.05 mol/L, initial solution pH of 3.08. After 5 h treatment under these conditions, color removal rate amounts to 99%, energy consumption 65.4 kW?h/m3 and TOC removal rate 56.95%. The reactive orange X-GN azo dye effluent can be effectively degraded by BDD anode.