以500W高压汞灯为光源，在TiO2光催化剂和电催化剂同时存在下，联合多相三维电极技术与光催化技术，对直接湖蓝5B水溶液进行了电助光催化降解的研究.实验结果表明，浓度为0.5mmol/L的直接湖蓝5B水溶液经30min的光电催化降解，其大环结构可迅速破坏，颜色可迅速褪去，色度去除率高达96.8%，COD去除率可达66.7%.考察了空气流速、光催化剂加入量、底物的初始浓度、电解槽电压、pH值、电导率、以及曝气量等因素对直接湖蓝5B脱色率及COD去除率的影响.
Present st udy was to report electrically assisted photocatalyticdegradation of direct sky blue aqueous solution by three-phase three-dimensional electrodes. By illumin ating with 500 W high pressure mercury lamp and initiating with 30 voltage direc t current, a decolorization ratio of higher than 96.8% and COD concentration redu ction of about 66.7% were observed during a period of 30 min in the presence of both photocatalyst and filler electrodes. Compared with these values, the lower decol orization ratios and COD removal obtained by a single application of photochem ical (77.3% and 50.6%) and electrochemical process (88.6% and 62.3%), respective ly. Variety of operating conditions, such as conductivity, cell voltage, pH valu e , initial concentration of substrate, air-flow and concentration of photocataly st， was discussed in detail to ascertain their respective effect on the treatme nt e fficiency. The reaction mechanism also was discussed in the system of electrical ly assisted photocatalytic degradation with three-dimensional electrodes.
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