以钛酸四丁酯为钛源,离子液体1-丁基-3-甲基咪唑四氟化硼([C4MIM]BF4)为辅助剂,采用水热法制备了锐钛矿相的介孔二氧化钛.用盐酸和氨水调节反应前驱体的pH,考察了pH在1～11变化范围内对离子液体-水制备二氧化钛体系的影响.采用X射线衍射和N2吸附-脱附对样品的晶相和孔结构进行表征.结果表明:离子液体抑制了板钛矿二氧化钛的形成,随着pH的增大样品的晶化程度增强.pH在1～9较大范围变化时,其孔径分布较窄,平均孔径随pH增大由6.6 nm减小到5.0 nm,此时离子液体能较好的将样品粒径控制在9 nm左右.这与透射电镜分析结果相一致.
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