Ionic-liquid-assisted growth of flower-like TiO₂ film on Ti substrate with high photocatalytic activity

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• 作者：Hu Li ; Jia Zhang ; Xiaofang Chen ; Gaifang Pan ; Yuning Huo ; ^{huoyuning@shnu.edu.cn}
• 关键词：Flower-like TiO2 film ; Direct oxidation ; [Bmim]BF4 ionic liquid ; Photocatalytic activity ; Rhodamine B
• 刊名：Journal of Molecular Catalysis A: Chemical
• 出版年：2013
• 出版时间：July, 2013
• 年：2013
• 卷：373
• 期：Complete
• 页码：12-17
• 全文大小：1718 K

文摘

Flower-like anatase TiO₂ films on Ti substrate were prepared via direct oxidation in H₂O₂ solution assisted with [Bmim]BF₄ ionic liquid. The promotion effect of ionic liquid to both the growth of anatase TiO₂ crystal and the formation of flower-like morphology was demonstrated. The formation process of flower-like TiO₂ film was investigated via adjusting the oxidation reaction time. During the photo-degradation of aqueous rhodamine B solution under UV light (¦Ë = 365 nm) in rotating disk reactor, the obtained flower-like TiO₂ film exhibited efficient decomposition of rhodamine B, which could be contributed that the flower-like morphology of TiO₂ film with high anatase crystallization and mesoporous structure led to the enhancement of light harvesting and reactant adsorption. Furthermore, the excellent stability of TiO₂ film during the photo-degradation reaction was resulted from the stable combination of TiO₂ film with Ti substrate.