蒽醌修饰石墨毡阴极催化活性研究

Catalytic Activity of Anthraquinone-modified Graphite Felt as Cathode

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。

Anthraquinone-modified graphite felt was characterized by SEM, XRD and their removals of Acid Red B were studied. The results showed that both graphite felt and anthraquinone-modified graphite felt had good space and surface structure. And more anthraquinone crystals could be observed uniformly on anthraquinone-modified graphite felt. The efficiency of the electrochemical degradation of Acid Red B was enhanced by anthraquinone modifying graphite felt. With Ti/RuO_2-IrO_2 electrode as anode, anthraquinone-modified graphite felt as cathode, under the conditions of current density 86 m A/cm^2, electrolyte concentration 0.02 mol/L, electrode distance 1 cm, initial pH 5.0, electrolytic time 30 min, the removals of Acid Red B was up to 97%, 10% higher than those with graphite felt as cathode. Under the same condition, electrochemical degradation process of Acid Red B was approximately complied with the first-order kinetics when anthraquinone-modified graphite felt was used as cathode.