Preparation, characterization and photocatalytic activity of TiO₂-ZrO₂ binary oxide nanoparticles

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• 作者：Ayca Kambur ; Gulin Selda Pozan ; ^{gpozan@istanbul.edu.tr} ; Ismail Boz
• 关键词：Photocatalysis ; Phenol ; ZrO2 ; TiO2 ; UV irradiation ; Characterization
• 刊名：Applied Catalysis B ; Environmental
• 出版年：2012
• 期刊代码：4_09263373
• 类别：ce
• 出版时间：5 April, 2012
• 卷：115-116
• 期：Complete
• 页码：149-158
• 文件大小：1402 K

摘要

TiO₂-ZrO₂ binary oxide catalysts were successfully prepared by a solid state reaction. The interaction between TiO₂ and ZrO₂ affected the photocatalytic efficiency of mixture. 50%TiO₂-ZrO₂ photocatalyst exhibited much higher photocatalytic activity than pure TiO₂ and the standard Degussa TiO₂ P-25 in the degradation of phenol under UV irradiation. The profound effect of binary oxide catalyst for phenol degradation is generally considered due to the high surface area, small particle size, anatase phase and high monoclinic phase of ZrO₂ content, and the presence of more surface OH groups than that of the pure TiO₂ and ZrO₂ photocatalyst. A natural pH of 5 is favorable for the photodegradation of phenol by 50TiO₂-ZrO₂ solid state dispersion (SSD) and 90%TOC removal can be achieved in 90 min. Monoclinic form of ZrO₂ is found to be more effective for photodegradation. The catalytic activity was affected by the preparation method. The observed photodegradation activity for phenol follows the order 50%TiO₂-ZrO₂ (solid state dispersion) >50%TiO₂-ZrO₂ (impregnation (IMP)) >50%TiO₂-ZrO₂ (sol-gel (SG)).