以高阻抗多孔陶瓷材料为基体、Sb 掺杂SnO2为活性组分,采用浸渍-焙烧法制备新型负载型粒子电极。借助于扫描电子显微镜、能量色散 X 射线能谱和X射线衍射等分析手段对粒子电极的形貌及晶相组成进行了表征,通过三维电催化氧化降解二氯喹啉酸废水实验研究粒子电极的电催化反应效能。结果表明,所制备的粒子电极表面积增加,孔道增多,负载了Sb 掺杂SnO2晶体,因而提高了电催化氧化反应的效率。当槽电压为15 V,电极间距为7 cm,电解质投加量为0.1 mol/L,反应120 min 后,采用所建立的三维电极体系处理二氯喹啉酸废水,COD 去除率达到64.3%,相应的能耗为14.4 kWh·(kg COD)-1,与二维电极体系相比,COD 去除率提高了26.9%,低耗降低了99.3%。
New-type supported particle electrodes with Sb doped SnO2 as the activated components were pre-pared on high-impedance porous ceramic material substrates by the impregnation-calcination process.The sur-face micrograph and crystal structure of the particle electrodes were characterized by the means of scanning elec-tron microscopy (SEM),energy dispersive X-ray spectroscopy (EDS)and X-ray diffraction (XRD).The re-search on particle electrode electro-catalytic activity efficiency was based on the performance about the degrada-tion of quinclorac wastewater by the three-dimensional electro-catalytic oxidation method.The results indicated with the increase of the surface area and pores of the particle electrodes and Sb doped SnO2 crystals,the electro-catalytic activity efficiency was improved.With the cell voltage was 1 5 V,the electrode separation was 7 cm, the amount of electrolyte was 0.1 mol/L and the reaction time was 120 min,the COD removal rate could reach 64.3% and the corresponding energy consumption became 14.4 kWh·(kg COD)-1 .Compared with the two-di-mensional electrode system,the COD removal rate increased by 26.9% but the energy consumption decreased by 99.3%.
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