用浸渍、烧结方法制备了不锈钢网(3×15cm)负载催化剂:由溶胶-凝胶法制备含(400目)电气石粉的二氧化钛催化剂,并与直接混合电气石粉、P-25TiO2的复合负载催化剂进行对照;利用X射线衍射、扫描电镜、透射电镜等表征催化剂结构;研究了催化剂在反应器(14L)中由20W紫外杀菌灯照射下先催化氧化去除气相甲苯污染物的效果.结果表明,在制溶胶过程中添加微米级电气石粉,得到催化剂粒径较小,其负载量和催化活性均有提高,平均催化比活性达到1.90mg·m-2·min-1或0.11mg·g-1·min-1,该催化剂在静态条件下反应4h,对初始浓度为180mg·m-3和70mg·m-3的甲苯去除率分别达到87%和82%;而同样的高初始浓度下,负载P-25仅可去除21%甲苯,复合负载P-25、电气石可去除58%甲苯,其催化比活性达到1.35mg·m-2·min-1或0.18mg·g-1·min-1.
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