Promoting role of transition metal oxide on ZnTiO₃-TiO₂ nanocomposites for the photocatalytic activity under solar light irradiation

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• 作者：Beysim Ozturk ; Gulin Selda Pozan Soylu ; ^{gpozan@istanbul.edu.tr" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Photocatalytic degradation ; 4-Chlorophenol ; ZnTiO3&ndash ; TiO2 ; Transition metal oxide ; Solar light irradiation ; Characterization
• 刊名：Ceramics International
• 出版年：2016
• 出版时间：July 2016
• 年：2016
• 卷：42
• 期：9
• 页码：11184-11192
• 全文大小：1688 K

文摘

Transition metal oxide (Fe₂O₃, Co₃O₄ and CuO) loaded ZnTiO₃–TiO₂ nanocomposites were successfully prepared by solid state dispersion method. The structural, morphological and optical properties of samples were characterized by TGA/DTA, XRD, BET, FT-IR, DRS, PL, XPS and SEM techniques. The photocatalytic activity of samples was investigated by degradation of 4-chlorophenol in water under sunlight. The Fe₂O₃ loaded sample was found to exhibit much higher photocatalytic activity than the other composite powders. 7Fe₂O₃/ZnTi sample has the highest percentage of 4-chlorophenol degradation (100%) and highest reaction rate (1.27 mg L⁻¹ min⁻¹) was obtained in 45 min. The enhancement of photocatalytic activity for ZnTiO₃–TiO₂ sample with Fe₂O₃ addition may be attributed to its small particle size, the presence of more surface OH groups, lower band gap energy than other samples in this paper and the presence of more hexagonal ZnTiO₃ phase in the morphology.