采用超声强化溶胶-凝胶法，以硝酸镧和钛酸丁酯为前驱体，选取石英砂作为载体，制备了 La 掺杂TiO2/石英砂复合光催化材料，通过 XRD、DSC-TG和SEM等测试手段对复合材料的结构和理化性质进行了表征分析，并选取 TNT 废液作为目标污染物，考察复合了光催化材料的光催化性能.结果表明，在紫外光照射下，适量的镧掺杂能够提高 TiO2/石英砂的光催化活性，当镧掺杂量为1．5％(摩尔分数)，焙烧温度为400℃时，复合材料的光催化性能最佳.
Lanthanum doping TiO2/quartz sand composite photocatalyst was prepared by sol-gel method with quartz sand,Ti(OC4 H9 )4 and La(NO3 )3 .Under the ultraviolet light the photocatalytic activity of the composite photocatalyst was evaluated by degradation of TNT.The results showed that the photocatalytic activities of lan-thanum doping TiO2/quartz sand composite photocatalysts are superior.The photocatalystic activity of the La-TiO2/quartz sand composite photocatalyst calcined under 400 ℃ and doped with 1.5% of lanthanum was the best.
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