以活性炭纤维毡为阳极,不锈钢片为阴极,在Na_2SO_4介质中用恒定的电流强度进行电解,一定时间后将活性炭纤维毡取出用蒸馏水冲洗干净,在110℃下干燥12h,在干燥器中冷却至室温后,进行称重和红外、比表面积及孔分布测试.同时,以石墨片为阳极进行对比实验.结果显示,在电化学氧化过程中,活性炭纤维阳极表面的含氧活性基团量增加;与石墨电极相比,活性炭纤维电极具有更好的抗氧化性能和更高的析氧电位.因此,在难降解有机物的电氧化处理过程中活性炭纤维毡比石墨片更适宜作阳极.
The electrochemical oxidation process was performed using an activated carbon fiber (ACF) felt as an anode under constant current in Na_2SO_4 solution.After electrolyzing different times,ACFs were taken out and washed with distilled water and dried for 12h in vacuum at 110℃.After cooling to room temperature in desiccator,ACFs were weighed and analyzed by means of FT-IR spectroscopy and nitrogen adsorption method.At the same time,the contrast experiment was carried out using a graphite flake as an anode.The results showed that the amount of oxygen-containing groups on the ACF surface is increased in the process of electrochemical oxidation and ACF anode has better oxidation resistance performance and higher oxygen evolution potential compared with graphite anode.So,ACF is more appropriate to be the anode than graphite flake in the electrochemical oxidation process of refractory organics.
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