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在HF/乙醇电解液中,采用恒电压电化学阳极氧化法,将P型硅片制备成了多孔硅催化剂。以甲基橙模拟废水为目标物,分析了电化学阳极氧化条件对多孔硅光催化甲基橙脱色率的影响。结果表明:随着HF浓度、阳极氧化时间、电流密度和光照时间的增加,甲基橙的脱色率逐渐增大。当V(HF)∶V(乙醇)=1∶1、阳极氧化时间为30min、电流密度为10mA/cm2以及光照时间为60min时,对甲基橙废水的脱色率较好。用十二烷基苯磺酸钠修饰的多孔硅对甲基橙废水有更高的脱色率。同直接催化相比,光催化甲基橙废水的脱色率提高到45.32%。同时对多孔硅表面形貌进行了表征。
In HF / ethanol electrolyte, a constant voltage electrochemical anodic oxidation method was used to prepare P-type silicon into a porous silicon catalyst. The effect of electrochemical anodic oxidation on the decolorization rate of methyl orange by porous silicon was analyzed with methyl orange simulated wastewater as the target. The results showed that with the increase of HF concentration, anodization time, current density and illumination time, the decolorization rate of methyl orange gradually increased. The decolorization rate of methyl orange wastewater was better when V (HF): V (ethanol) = 1: 1, anodic oxidation time was 30min, current density was 10mA / cm2 and illumination time was 60min. Porous silica modified with sodium dodecyl benzene sulfonate has a higher decolorization rate for methyl orange wastewater. Compared with direct catalysis, the decolorization rate of photocatalytic methyl orange wastewater increased to 45.32%. At the same time, the surface morphology of porous silicon was characterized.