以聚乙二醇(PEG)为造孔剂,采用溶胶-凝胶法制备了多孔纳米TiO_2粉末,并对样品进行了氮吸附测试和X射线衍射分析.结果表明:煅烧过程中,聚乙二醇的受热分解在TiO_2颗粒中形成了4～6 nm的中孔结构;600 ℃煅烧的TiO_2样品均呈单一的锐钛矿相结构,且适量聚乙二醇的加入可抑制TiO_2粒径的长大.光催化降解罗丹明B表明:催化剂具有很强的氧化能力,适量聚乙二醇的加入可提高TiO_2的光催化性能,在本实验进行的条件下,PEG最佳加入量为0.50 g.
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