以γ-Al2O3作为载体,采用浸渍热分解法制备了Sn、Mn、Cu、Pb单组分氧化物和Sn-Ce-Sb复合氧化物粒子电极.通过对酸性橙Ⅱ(AOⅡ)的降解实验,以及采用重复试验和扫描电镜(SEM)、紫外光谱扫描等方法,探讨了粒子电极材料的性能.研究结果表明:Sn/γ-Al2O3相比于Mn/γ-Al2O3、Cu/γ-Al2O3、Pb/γ-Al2O3等单组分氧化物粒子电极表现出了更好的电催化活性和稳定性.掺杂Ce、Sb后电极表面晶体粒径细小且分布均匀,有利于提高Sn/γ-Al2O3粒子电极的性能.电流密度为20 mA/cm2,曝气量0.5 L/min反应条件下,反应3h后Sn-Ce-Sb/γ-Al2O3粒子电极对AOⅡ的去除率为100％,TOC的去除率达84.2％,重复使用5次后TOC去除率仍保持在80％以上.表明Sn-Ce-Sb/γ-Al2O3粒子电极具有较好的应用前景.%Particle electrodes with different active single metallic oxides,i.e.Cu,Mn,Pb,Sn and Sn-Ce-Sb complex metal oxides supported over γ-Al2O3 were prepared by incipient wetness impregnation.The properties of the particle electrodes were investigated by using acid orange Ⅱ (AO Ⅱ) degradation,repeated test,scanning electron microscopy (SEM) and UV-Vis tests.The results showed that,Sn/γ-Al2O3 had excellent electro-catalytic activity and stability for AO Ⅱ treatment compared with the other single metallic oxides.And doping with Ce and Sb could improve the catalytic activity and stability of Sn/γ-Al2O3,which was covered with finer and more crystal particles.Under current density of 20 mA/cm2 and aeration quantity of 0.5 L/min,the conversion rate and total organic carbon (TOC) removal efficiency for A OⅡ in three hours reached 100％ and 84.2％,respectively.TOC removal efficiency could even keep over 80％ after repeated tests for five times,which indicated that Sn-Ce-Sb/γ-Al2O3 particle electrodes prepared in this research had superior application prospect.
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