采用超声强化溶胶-凝胶法,以无水乙醇和钛酸丁酯为前驱体,选取石英砂作为载体,制备了 La、Fe共掺杂TiO2/石英砂复合光催化材料.通过XRD、UV-Vis和SEM等测试手段对复合材料的微观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La、Fe共掺杂能够提高 TiO2/石英砂的光催化活性.当 La 掺杂量为1．0％(摩尔分数),Fe 掺杂量为0．25％(摩尔分数),焙烧温度为450℃时,复合材料的光催化性能最佳.
La and Fe co-doped TiO2/quartz sand composite photocatalyst was prepared by sol-gel method with quartz sand.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 La and Fe co-doped TiO2/quartz sand composite photocatalysts are superior.The photocatalystic activity of the La,Fe-TiO2/quartz sand compos-ite photocatalyst calcined under 450 ℃ and co-doped with 1.0mol% of La,0.25mol% of Fe was the best.
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