Visible light assisted photodecolorization of eosin-Y in aqueous solution using hesperidin modified TiO₂ nanoparticles

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• 作者：K. Vignesh^a ; A. Suganthi^a ; ^{suganthiphd09@gmail.com} ; M. Rajarajan^b ; ^{rajarajan_1962@yahoo.com} ; R. Sakthivadivel^a
• 关键词：Photocatalysis ; Hes-TiO2 ; Eosin-Y ; Visible light ; Photodecolorization
• 刊名：Applied Surface Science
• 出版年：2012
• 期刊代码：6_01694332
• 类别：ms
• 出版时间：1 March, 2012
• 卷：258
• 期：10
• 页码：4592-4600
• 文件大小：833 K

摘要

Hesperidin a flavanoid, modified TiO₂ nanoparticles (Hes-TiO₂) was synthesized to improve the visible light driven photocatalytic performance of TiO₂. The synthesized nanoparticles were characterized by UV-visible diffuse reflectance spectroscopy (UV-vis-DRS), FT-IR, powder X-ray diffraction (XRD) and scanning electron microscopy (SEM). The photocatalytic activity of Hes-TiO₂ was investigated based on the decolorization of eosin-Y under visible light irradiation. Hes-TiO₂ showed high efficiency for the decolorization of eosin-Y. The influences of various reaction parameters like effect of pH, catalyst dosage and initial dye concentration on the photocatalytic efficiency were investigated. The adsorption of eosin-Y on Hes-TiO₂ was found favorable by the Langmuir approach. The removal percentage of chemical oxygen demand (COD) was determined to evaluate the mineralization of eosin-Y during photodecolorization. Based on the intermediates obtained in the GC-MS spectroscopic technique, a probable degradation mechanism has been proposed.