摘要：

采用溶胶-凝胶法在玻璃纤维网上制备TiO₂膜，以光催化降解水中苯酚作为探针反应，研究了溶剂和酸的用量对胶液稳定性和催化膜活性的影响，并考察了胶液重复利用的可行性。通过实验所选定的胶液最佳配比为：V(无水乙醇)：V(钛酸丁酯):V(1+4的硝酸):V(水)=720:80:2.5:8，所配的胶液可以稳定放置3个月以上。所制胶液在重复利用8次的情况下，对催化剂在基材上的负载量和其催化活性影响很小。研究结果为利用该方法在工业上大规模制备TiO₂催化膜提供了可靠的依据，并为开发实用化水处理光催化反应装置奠定了基础。

关键词: 溶胶-凝胶, TiO₂膜, 玻璃纤维网, 胶液

Abstract:

Sol-gel method has been used for preparing TiO₂ film on fiberglass net.The photocatalytic degradation of the phenol in water is used as probe reaction.The effect ofthe dosages ofsolvent and acid on the stabilityofsol solu- tion and the activityofthe TiO₂ catalyst has been studied.The feasibilityofsol solution recyclinghas been investigat- ed.The optimal composition ratioofthe sol solution based on experiments are: C₂H₅OH∶ Ti(C4H9O)4∶HNO₃(1∶ 4)∶ H₂O= 720∶ 80∶ 2.5∶ 8(V/V).The sol solution can be stored stablyfor more than three months.When the prepared sol solution is reused for preparingTiO₂ film8 times, their loadingamount and photocatalytic activityhave nodistinct changes.The results provide reliable reference for the preparation of TiO₂ film catalyst in large scale, and establish solid basis for developingpracticalphotocatalyticequipmentthatcanbeusedinwatertreatment.

Key words: sol-gel, TiO₂ film, fiberglass net, sol solution

中图分类号: 

• X703.1