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采用浸渍法制备蒽醌修饰石墨毡催化阴极,通过SEM、XRD等表征手段分析其微观形态,并通过电化学降解酸性红B与石墨毡阴极进行蒽醌催化活性的研究。结果表明:石墨毡和蒽醌石墨毡均具有较好的空间和表面结构,蒽醌修饰石墨毡上存在较均匀的蒽醌晶体;蒽醌物质的存在可提高酸性红B的电化学降解效率;当以Ti/RuO_2-IrO_2为阳极,电流密度为86 m A/cm2、Na_2SO_4浓度为0.02mol/L、极板间距为1 cm、初始pH为5.0,电解30 min,蒽醌修饰石墨毡为阴极时酸性红B的去除率达97%,比相同条件下以石墨毡为阴极时酸性红B的去除率高出约10%;同时,蒽醌修饰石墨毡为阴极时,电化学降解酸性红B的降解动力学近似符合一级动力学。
The anthraquinone-modified graphite felt cathode was prepared by impregnation method. The microstructure was analyzed by SEM and XRD, and the catalytic activity of anthraquinone by electrochemical degradation of acid red B and graphite felt cathode was also studied. The results show that both graphite felt and anthraquinone graphite felt have better spatial and surface structure, anthraquinone-modified graphite felt has more uniform anthraquinone crystal, anthraquinone substance can improve the electrochemical degradation efficiency of acid red B, When the current density of Ti / RuO_2-IrO_2 was 86 m A / cm 2, the concentration of Na_2SO_4 was 0.02 mol / L, the distance between plates was 1 cm, the initial pH was 5.0 and the electrolysis time was 30 min, the anthraquinone- When the removal rate of acid red B was 97%, the removal rate of acid red B was about 10% higher than that of the graphite felt under the same conditions; meanwhile, when the anthraquinone-modified graphite felt was used as the cathode, the acid red B Degradation kinetics approximate first-order kinetics.