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化工进展 2015

不同复极性粒子电极的制备及电催化氧化效能

DOI: 10.16085/j.issn.1000-6613.2015.12.019, PP. 4254-4258

魏金枝,胡琴,张少平

Keywords: 电化学,粒子电极,有机化合物,污染,COD去除率

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Abstract:

分别以高阻抗的瓷环粒子、陶瓷粒子、陶土粒子及黏土粒子为载体,负载Sb掺杂SnO2活性催化组分制备粒子电极,并通过SEM、EDS、XRD等表征手段对其形貌及结构进行研究,筛选出瓷环粒子、陶土粒子。并以农药氧化乐果为目标物,对所筛选的粒子电极进行电催化氧化效能的对比研究。结果表明,负载Sb掺杂SnO2的瓷环粒子电极表面积相对较大,具有丰富的孔结构,且具有一定的导电性。在所构建的三维电极体系中处理COD为900mg/L左右的氧化乐果废水,当支持电解质无水Na2SO4浓度为0.1mol/L、激发槽电压为13V时,处理120min后,在瓷环粒子三维电极体系中废水COD去除率比陶土粒子三维电极体系高9.58%,比二维电极体系高25.7%;相应的能耗分别低2.9kW·h/kg(COD)和7.9kW·h/kg(COD)。

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