离子液体@TiO2纳米复合材料的制备及其光催化性能

doi:10.11944/j.issn.1000-0518.2016.04.150269

摘要/Abstract

摘要：

利用—Si—O—共价键将离子液体嫁接在纳米TiO₂表面,制备离子液体@TiO₂纳米复合材料,并利用红外光谱、差热分析、元素分析等技术手段进行了分析。光催化性能研究表明,在紫外光照射60 min后,[C₈tespim]Br@TiO₂([C₈tespim]:N-3-(3-三乙氧基硅烷基丙基)-4,5-二氢咪唑)复合材料能够将甲基橙100%脱色,明显优于TiO₂ P25的光催化降解性能。同时发现其光催化性能与阴离子类型有密切关系,活性顺序为[C₈tespim]Br@TiO₂<[C₈tespim]PF₆@TiO₂<[C₈tespim]Tf₂N@TiO₂。

关键词: 离子液体@TiO2纳米复合材料, 光催化剂, 甲基橙

Abstract:

IL@TiO₂ nanocomposites were synthesized by grafting ionic liquids(ILs) onto the surface of TiO₂ via —Si—O— covalent bond. The prepared nanocomposites were acharacterized by IR, thermal gravity-differential analysis and elemental analysis. [C₈tespim]Br@TiO₂([C₈tespim]:N-3-triethoxysilypropyl-4,5-dihydroimidazole) can catalyze the degradation of methyl orange to almost colourless after being illuminated by ultraviolet light for 60 min. The superior performance of prepared nanocomposites compared to that of TiO₂ nanopaticles suggests that anion-exchange can tailor the photocatalytic activity, and the activity order is [C₈tespim]Br@TiO₂<[C₈tespim]PF₆@TiO₂<[C₈tespim]Tf₂N@TiO₂(Tf₂N:bis[(trifluoromethyl)sulfonyl]imide).

Key words: IL@TiO2 nanocomposites, photo-catalyst, methyl orange

于宗龙, 贾春晓, 路鑫, 韩海港, 辛炳炜. 离子液体@TiO₂纳米复合材料的制备及其光催化性能[J]. 应用化学, 2016, 33(4): 459-465.

YU Zonglong, JIA Chunxiao, LU Xin, HAN Haigang, XIN Bingwei. Synthesis of Ionic Liquid@TiO₂ Nanocomposites and Their Photocatalytic Performance[J]. Chinese Journal of Applied Chemistry, 2016, 33(4): 459-465.

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离子液体@TiO₂纳米复合材料的制备及其光催化性能

Synthesis of Ionic Liquid@TiO₂ Nanocomposites and Their Photocatalytic Performance

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