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-  2018 

Fe/ACF@OMC复合阴极的制备及其在多相电-Fenton中的应用

Keywords: 有序介孔碳,活性碳纤维,铁负载,电-Fenton,活性艳红X-3B

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Abstract:

以活性碳纤维(ACF)为基体材料,硝酸铁为铁源,乙酰丙酮为分散剂,酚醛树脂为碳源,采用浸渍-溶剂挥发自组装-碳化组合方法制备了铁负载有序介孔碳(OMC)包覆的活性碳纤维(ACF)复合材料Fe/ACF@OMC.通过透射电镜(TEM)、扫描电镜(SEM)、N_2吸附-脱附、X射线衍射(XRD)、X射线光电子能谱(XPS)对其进行表征.表征结果显示,该复合材料具有规则的介孔孔道结构,乙酰丙酮的投加有效减小了负载铁物种的粒径,铁物种晶相包括α-Fe_2O_3、γ-Fe_2O_3和单质铁,表面价态组成为Fe~(2+)(39.5%)和Fe~(3+)(60.5%).以Fe/ACF@OMC为阴极构建多相电-Fenton体系,可以实现在广泛pH值范围(3.0~10.0)内对活性艳红X-3B的脱色降解和TOC(总有机碳)去除.该脱色降解反应符合一级反应动力学,最优条件下X-3B的准一级降解速率常数达0.048 min~(-1),240min TOC去除率达到40%.荧光检测证实,羟基自由基是该体系的主要活性氧化物种.Fe/ACF@OMC循环使用5次后,X-3B的脱色率无显著下降

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