以廉价的TiCl4,和工业水玻璃为原料,采用溶胶一凝胶法,分别用三甲基氯硅烷(TMCS)和乙醇(EtOH)溶液对湿凝胶进行溶剂交换/改性处理,常压干燥制备了TiO2-siO2复合气凝胶.利用SEM、FTlR和BET吸附对复合气凝胶的结构、形貌和孔性质进行了研究,分析了TiO2-SiO2复合气凝胶吸附和光催化降解罗丹明B的性能.结果表明:用TMCS溶液改性处理湿凝胶经常压干燥得到的气凝胶具有连续多孔结构,其孔体积为2.319cm3·g-1,孔径为9.74nm,比表面积为716.81m2·g-1;用EtOH溶液改性处理湿凝胶经常压干燥得到的气凝胶孔体积为0.12cm33·g-1,孔径为3.07nm,比表面积为646.34m2·g-1;用TMCS溶液改性湿凝胶得到的气凝胶对罗丹明B的吸附率和光解率要高于用EtOH溶液改性湿凝胶得到的气凝胶.
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