Preparation and enhanced visible light catalytic activity of TiO₂ sensitized with Benzimidazolone Yellow H3G

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• 作者：Xili Shang^a ; ^b ; Bin Li^a ; ^c ; ^{libin@tju.edu.cn} ; Changhai Li^b ; Xiao Wang^a ; Tianyong Zhang^a ; ^{tyzhang@tju.edu.cn} ; Shuang Jiang^a
• 关键词：Benzimidazolone Yellow H3G ; TiO2 ; Photocatalysis ; Visible light ; Organic pigment ; Degradation
• 刊名：Dyes and Pigments
• 出版年：2013
• 出版时间：September, 2013
• 年：2013
• 卷：98
• 期：3
• 页码：358-366
• 全文大小：1447 K

文摘

A TiO₂ photocatalyst sensitized with commercial organic pigment Benzimidazolone Yellow H3G was conveniently prepared and characterized by FT-IR, UV-Vis, XRD, SEM and N₂ adsorption-desorption isotherms. The adsorption capacities and photocatalytic activities of the new photocatalyst were evaluated by photocatalytic degradation of Methyl Orange, Rhodamine B and Acid Chrome Blue K under irradiation with visible light. The results indicated that the new photocatalyst extends the photoresponse of TiO₂ from the UV to the visible region. The photocatalysed degradation rates of the three dyes were in the range of 89-95 % . The influence of the pH of the solutions on the photocatalytic activity was investigated and the mechanism of action was also discussed. Photocatalytic activity of the catalyst is reproducible which demonstrates excellent stability and recyclability factors, which are crucial to industrial wastewater treatment.