以廉价的TiCl4和工业水玻璃为原料,通过溶胶-凝胶法制得了TiO2-SiO2复合湿凝胶,用三甲基氯硅(TMCS)/乙醇(EtOH)/己烷(Hexane)溶液对湿凝胶进行改性,再经常压干燥制备了TiO2-SiO2纳米多孔材料.利用扫描电子显微镜(SEM)、红外吸收光谱(FTIR)和N2吸附/解吸法对纳米多孔材料的形貌和性质进行了分析.结果表明,所制备的TiO2-SiO2纳米多孔材料为轻质块状固体,具有连续多孔结构,密度为0.14～O.25g/cm3,孔隙率为88.6%～93.6%,比表面积为716.8～802.7m2/g.吸附和光催化降解罗丹明B的结果表明,n(Ti):n(Si)=1:3的样品吸附率最高,20h时达到86%,n(Ti):n(Si)=1:2的样品光催化降解率最高,10h时可达到94%.
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