摘要
研究了两种以Ti为基体,气相法沉积硼掺杂金刚石薄膜(BDD)电极和热分解方法着附IrO2-RuO2涂层电极对工业难降解污染物——苯酚的降解能力。采用循环伏安法,探讨了两种电极的电化学性能。结果表明,以亚甲基蓝作为氧化物的捕获剂,在相同的实验条件下,DSA电极产生氧化物(ClO-)的速度大于BDD电极产生等量氧化物(·OH)的速度。用两种Ti基电极分别降解苯酚溶液48h,BDD电极对苯酚的降解率几乎达到100%,而IrO2-RuO2涂层电极仅为35.6%。苯酚溶液的COD去除率在IrO2-RuO2涂层电极下仅为27.8%,在BDD电极下达到95.3%,且反应产物不易积累。因此,Ti基BDD电极在含芳香类化合物的污水处理方面有较高的应用价值和广阔的推广前景。
The performance of two electrodes—a titanium- based oxide electrode（ DSA） and a boron- doped diamond electrode（ BDD） was investigated by comparing the degradation ability of two electrodes on recalcitrant pollutants- phenol in electrolytic sewage system. The electrochemical behaviors of the electrodes were investigated by cyclic voltammetry. Making methylene blue as an oxide trapping agent,in the same experimental conditions,the speed that the DSA electrodes produce ClO-is much larger than the speed BDD electrode produce ·OH. Phenol solution was electrochemical oxidation gradated for 48 hours with two electrodes respectively; the result shows that the removal rate of phenol is almost 100% by BDD electrode while it is only 35. 61% by IrO2- RuO2electrode. The removal rate of COD in wastewater is 27. 83% by IrO2- RuO2electrode and 95. 35% by BDD electrode in which intermediate products is not easy to be accumulate. The BDD electrode exhibits good application prospect in environmental protection.
出处
《材料开发与应用》
CAS
2014年第2期55-60,共6页
Development and Application of Materials
基金
装备预研支撑技术项目(62101100301)
