以TiCl4为原料,采用自组装技术制备TiO2-SiO2复合粒子,加入聚乙二醇2000(PEG 2000),探讨聚乙二醇对TiO2-SiO2粒子生成及光催化降解甲基橙的影响.研究发现:随组装次数的增多,复合粒子表面TiO2的含量增多:随PEG2000的加入,TiO2颗粒间呈现一定的孔隙,使TiO2层粒子的表面积增加;样品经550℃煅烧,得到均为锐钛矿与金红石的混合相,且随着PEG2000含量的增加,锐钛矿的相对含量随之增加;光催化实验表明,PEG2000的掺杂使TiO2-SiO2的光催化性能得以提高.
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