| 一种新型石墨电极的制备及其对苯酚的去除 |
| 摘要点击 2412 全文点击 2157 投稿时间：2008-08-27 修订日期：2008-11-18 |
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| 中文关键词 石墨电极 苯酚 苯醌 电化学降解 UV光谱 |
| 英文关键词 graphite electrode phenol benzoquinone electrochemical oxidation UV spectrum |
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| 中文摘要 |
| 为了探索一种对有机废水处理有效、廉价、来源广泛、环境友好的电极，以石墨、环氧树脂、固化剂和丙酮为原料，研究制备了一种新型石墨电极 (NGE). 分别采用热水浸泡、乙醇溶液回流、丙酮回流、超声-丙酮回流以及电化学法对制备的石墨电极进行预处理，前三者效果较差，超声-丙酮回流可改善处理效果，但不够理想，电化学法可取得满意的效果.苯酚降解的UV光谱分析表明，尽管商品石墨电极 (CGE) 比NGE具有更高的苯酚氧化效率，但其电解液积累大量的苯醌，而NGE电解液中苯醌积累量少，并且电解过程中逐渐降低. NGE比CGE具有更好的TOC去除效果，两者TOC去除率分别为40%和31%. SEM分析结果表明，CGE被严重腐蚀，NGE无明显变化，表现出良好的稳定性. |
| 英文摘要 |
| In order to find an effective，stable，environmentally compatible electrode for the elimination of organic pollutants，preparation of a novel graphite electrode (NGE) was explored using graphite，epoxy resin，curing agent and acetone as materials. Water，ethanol aqueous solution，acetone，ultrasound-acetone and electrochemical method were used to pretreat the electrode. The first three methods obtained poor effect. Ultrasound-acetone could improve the pretreatment，but satisfied results were difficult to achieve. Electrochemical method could work effectively. Electrochemical oxidation of phenol was carried out on NGE and commercial graphite electrode (CGE)，respectively. UV spectroscopy was used to study evolution of phenol oxidation. The results showed that CGE resulted in accumulation of benzoquine in the electrolyte，though it was more effective than NGE on phenol oxidation. While much less benzoquinone was found in the electrolyte for NGE. TOC removal rate were 40% and 31% for NGE and CGE，respectively. SEM study showed that CGE was severely corroded after phenol degradation，while NGE was undamaged，showing good stability. |
