纳米累托石-TiO_2粉末光催化降解染料废水

Photocatalytic Degradation of Dye Waste Water by Nanometer Rectorite-TiO_2 Powder

用纳米累托石-TiO2粉末作催化剂,在紫外灯光下降解甲基橙溶液.考察了甲基橙溶液的pH值、初始浓度、纳米累托石-TiO2投加量对甲基橙降解率的影响.比较了相同条件下制备的纳米累托石-TiO2和纳米TiO2粉末及P25 TiO2粉末的光催化活性.实验结果显示:在紫外灯光照射下,纳米累托石-TiO2,纳米TiO2粉末及P25降解甲基橙30 min,降解率分别为:92.9%,50.9%,96.5%.在相同条件下制备的纳米累托石-TiO2粉末比纳米TiO2粉末具有更高的催化活性,接近当今催化活性最高的P25催化剂.

Experiments were conducted to degrade methyl orange solution with nanometer rectorite- TiO2 as catalyst in UV light in this study, exploring the effect of pH, initial concentration, and the amount of nanometer rectorite-TiO2 on the ratio of degradation of methyl orange. The catalytic activity of nanometer rectorite-TiO2, nanometer TiO2 which were perpared under the same condition and P25 from Degussa Company in Germany was compared. The results of the experiment indicate that： after reacting for 30 minutes in the UV light with these three kinds of catalyst, the degradation of the methyl orange solution reach 92.9%, 50.9%, 96.5% respectively. It is demonstrated that the nanometer rectorite-TiO2 has a higher catalystic activity than nanometer TiO2 which is prepared under the same condition, and its catalytic activity approach that of P25 which was the highest catalytic activity in the world now.