Surface-modification of TiO2 with new metalloporphyrins and their photocatalytic activity in the degradation of 4-notrophenol |
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Authors: | Wan-jun SunJun Li Gui-ping YaoFeng-xing Zhang Jun-Long Wang |
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Institution: | a Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Department of Chemistry, Northwest University, Xi’an, Shaanxi 710069, PR China b Wei Nan Teachers University, Wei Nan, Shaanxi 714000, PR China |
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Abstract: | A new mono-functionalized porphyrin derivative, 5-mono-4-(2-(4-hydroxy)-phenoxy)ethoxy]-10,15,20-triphenylporphyrin (3) and its Cu(II) (3a), Zn(II) (3b) and Ni(II) (3c) metalloporphyrins were synthesized and characterized by using various spectroscopic techniques. The corresponding 3a, 3b, 3c-TiO2 photocatalysts were then prepared and characterized by means of FT-IR and diffused reflectance spectra, X-ray diffraction (XRD) and scanning electron microscopy (SEM). The photocatalytic activities of 3a, 3b, 3c-TiO2 were investigated by testing the photodegradation of 4-nitrophenol (4-NP) in aqueous solution under the halogen lamp irradiation. The results indicated that all the 3a, 3b, 3c enhanced the photocatalytic efficiency of bare TiO2 in photodegrading the 4-NP, and 3a-TiO2 exhibited the highest photocatalytic activity. The result is considered a combined action of potential match of 3a with TiO2 CB and effective impregnated of 3a onto the surface of TiO2. |
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Keywords: | Porphyrins Metalloporphyrins Titanium dioxide Photodegradation 4-Nitrophenol |
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