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Preparation, characterization and photocatalytic activity of metalloporphyrins-modified TiO2 composites

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Abstract

Three new Cu(II), Zn(II), Co(II) 5,15-di (4-hydroxyphenyl)-10, 20-diphenyl-porphyrin (CuDHPP, ZnDHPP, CoDHPP) and the corresponding metalloporphyrins–TiO2 photocatalysts CuDHPP–TiO2, ZnDHPP–TiO2, CoDHPP–TiO2 were synthesized and characterized by SEM, XRD, FT-IR, and DRS. The results revealed that the metalloporphyrins impregnated onto the surface of TiO2 did not change the phase composition and particle sizes of TiO2 samples, but increased the photocatalytic efficiency. In addition, photoluminescence study showed that the three photocatalysts could successfully increase the separation efficiency of the photoinduced electron and hole. The photodegrading 4-NP experiments indicated that the three photocatalysts greatly enhanced the photocatalytic activity of bare TiO2, and the photocatalytic activity of CuDHPP–TiO2 was the highest. Moreover, the possible mechanism for the photodegradation of 4-NP was also proposed.

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Acknowledgments

This work was financially supported by National Nature Science Foundation of China (No. 20971103) and the International Cooperation Project of Shaanxi province (No. 2008KW–33).

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Authors and Affiliations

  1. Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi’an, 710069, People’s Republic of China

    Wanjun Sun, Jun Li, Xiangfei Lü & Fengxing Zhang

  2. Department of Environmental Engineering, College of Resource and Environment, Shaanxi University of Science and Technology, Xi’an, 710021, People’s Republic of China

    Xiangfei Lü

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  1. Wanjun Sun
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  2. Jun Li
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  3. Xiangfei Lü
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  4. Fengxing Zhang
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Correspondence to Jun Li.

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Sun, W., Li, J., Lü, X. et al. Preparation, characterization and photocatalytic activity of metalloporphyrins-modified TiO2 composites. Res Chem Intermed 39, 1447–1457 (2013). https://doi.org/10.1007/s11164-012-0701-z

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  • DOI: https://doi.org/10.1007/s11164-012-0701-z

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