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化工学报  2015 

Al2O3/ACF复合电极材料的制备及性能表征

DOI: 10.11949/j.issn.0438-1157.20150440, PP. 4703-4709

Keywords: 浸渍煅烧法,制备,氧化铝,复合材料,电吸附

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Abstract:

以H3PO4预处理后的活性炭纤维(ACF)毡为原料,采用浸渍煅烧法制备Al2O3/ACF复合电极材料;通过扫描电镜(SEM)、比表面积及孔径分析仪(BET)、X射线衍射(XRD)、X射线光电子能谱(XPS)、傅里叶红外光谱分析仪(FTIR)对负载Al2O3前后活性炭纤维的微观结构与电化学性能进行表征,利用自制的电吸附装置对NaCl模拟废水进行电吸附性能测试。结果表明,采用浸渍煅烧法成功制备了Al2O3/ACF复合电极材料,Al2O3/ACF复合体表面及孔道中有絮状或颗粒状的Al2O3存在,比表面积从1244.37m2·g-1降为974.59m2·g-1;同时,Al元素含量为1.06%,Al2O3以无晶相无定形态存在于纤维表面;Al2O3/ACF表面形成一些AlO键的官能团,其比电容比ACF提高76.5%。负载Al2O3后的ACF电极材料电吸附性能增强,除盐效率较ACF原样电极提升了2.3倍,且电极具有可再生性。Al2O3/ACF复合材料可以作为电极材料用于去除废水中的无机盐离子。

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