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中文摘要：
将离子液体和TiO_2P25纳米颗粒物理掺杂,构建了具有选择性降解功能的离子液体-TiO_2复合光催化体系,实现了染料废水的选择性降解。研究发现,离子液体的加入能够提高TiO_2对阴离子染料的降解效率,抑制阳离子染料的降解。通过优化离子液体的结构、用量等因素,筛选出了最佳复合体系[C_（10）mim]（CF_3SO_2）_2N-TiO_2P25（物质的量比为20∶1）。紫外光照射下,20 min即可将10.0 mg/L甲基橙溶液几乎脱色完全,而对阳离子染料的降解几乎完全抑制。该体系可以选择性地降解染料废水中的某一组分,简化阴阳染料的分离和回收。
英文摘要：
Ionic liquid-TiO2 mixing system was constructed by physical mixing ionic liquid and P25 TiO2. The result suggested that ionic liquid could improve the decolorization rate of anionic dye, such as methyl orange, while restrain the decolorization of cation- ic dye. The strueture and amount of ionic liquids were optimized, and found that [ C10 mim ] （ CF3 SO2 ） 2 N-TiO2 P25 with mole ratio 20：1 was the ideal system with the promising photocatalytic efficiency. It could degrade methyl orange to almost colourless after being illuminated by ultraviolet light for 20 min,whereas kept the cationic dye unfading. Ionic liquid-TiO2 mixture could simplify the species of dye waste-water,benefitting the purifition and reused.
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