Efficient visible photodegradation of 4-nitrophenol in the presence of H₂O₂ by using a new copper(II) porphyrin-TiO₂ photocatalyst

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• 作者：Gui-ping Yao ^{yaoguiping1985@126.com} ; Jun Li ; ^{junli@nwu.edu.cn} ; Yun Luo ^{ly-216@163.com} ; Wan-jun Sun ^{wanjuns1986@yahoo.cn}
• 关键词：Photocatalysis ; Cu(II) porphyrin ; TiO2 ; Photogradation ; 4-Nitrophenol ; Hydrogen peroxide
• 刊名：Journal of Molecular Catalysis A ; Chemical
• 出版年：2012
• 期刊代码：57_13811169
• 类别：ch
• 出版时间：September, 2012
• 卷：361-362
• 期：Complete
• 页码：29-35
• 文件大小：782 K

摘要

A new imidazolyl-linked pophyrin, 5-[4-(2-imidazolyl)ethoxyl]phenyl-10,15,20-triphenylporphyrin and its copper(II) porphyrin were synthesized and characterized spectroscopically. The CuPp-TiO₂ photocatalyst was also prepared and characterized by means of high-resolution transmission electron microscopy (TEM), X-ray diffraction (XRD), UV-vis spectra and FT-IR spectra. The photocatalytic activity was investigated by photodegradation of 4-nitrophenol (4-NP) in aqueous solution with a small amount of H₂O₂ under visible light irradiation (位 > 400 nm). The results indicated that H₂O₂ can enhance greatly the visible photocatalytic activity of CuPp-TiO₂ photocatalyst. Additionally, a possible mechanism of the photocatalytic degradation was proposed.