View More View Less
  • 1 Department of Environmental Engineering, Jinan University, West of Huangpu Road 601, Guangzhou 510632, People's Republic of China
  • | 2 Key Laboratory of Water/Soil Toxic Pollutants Control and Bioremediation, Department of Education of Guangdong Province, West of Huangpu Road 601, Guangzhou 510632, People's Republic of China
Restricted access

Cross Mark

Abstract

Polymer-modified TiO2 was found to be a new, efficient photocatalyst for the photodegradation of organic pollutants. Another novel sensitizer-poly(fluorene-co-bithiophene) (PFB) was presented in this study. Varying the bithiophene content of PFB from 10, 20, 33, 40 to 50% in molar ratio, a series of copolymers (PFB10, PFB20, PFB33, PFB40 and PFB50) were prepared and used as the sensitizers for TiO2. The photodegradation rates of phenol catalyzed by these polymer-modified titanium dioxide composites under the irradiation of the GaN LED clusters were investigated. It was found that PFB33-modified TiO2 was the most efficient photocatalyst although the absorption spectrum of PFB50 was broader than that of PFB33.

  • 1.

    Fujishima, A, Honda, K. 1972. Electrochemical photolysis of water at a semiconductor electrode. Nature. 238:3738 .

  • 2.

    Frank, SN, Bard, AJ. 1977. Heterogeneous photocatalytic oxidation of cyanide and sulfite in aqueous solutions at semiconductor powders. J Phys Chem. 81:14841488 .

    • Crossref
    • Search Google Scholar
    • Export Citation
  • 3.

    Gaya, UI, Abdullah, AH. 2008. Heterogeneous photocatalytic degradation of organic contaminants over titanium dioxide: a review of fundamentals, progress and problems. J Photochem Photobiol C. 9:112 .

    • Crossref
    • Search Google Scholar
    • Export Citation
  • 4.

    Wang, J, Xie, YP, Zhang, ZH, Li, J, Li, CW, Zhang, LQ, Xing, ZQ, Xu, R, Zhang, XD. 2010. Photocatalytic degradation of organic dyes by Er3+:YAlO3/TiO2 composite under solar light. Environ Chem Lett. 8:8793 .

    • Crossref
    • Search Google Scholar
    • Export Citation
  • 5.

    Mestankova, H, Mailhot, G, Jirkovsky, J, Krysa, J, Bolte, M. 2009. Effect of iron speciation on the photodegradation of monuron in combined photocatalytic systems with immobilized or suspended TiO2. Environ Chem Lett. 7:127132 .

    • Crossref
    • Search Google Scholar
    • Export Citation
  • 6.

    Merabet, S, Robert, D, Weber, JV, Bouhelassa, M, Benkhanouche, S. 2009. Photocatalytic degradation of indole in UV/TiO2: optimization and modelling using the response surface methodology (RSM). Environ Chem Lett. 7:4549 .

    • Crossref
    • Search Google Scholar
    • Export Citation
  • 7.

    Sakkas, VA, Dimou, A, Pitarakis, K, Mantis, G, Albanis, T. 2005. TiO2 photocatalyzed degradation of diazinon in an aqueous medium. Environ Chem Lett. 3:5761 .

    • Crossref
    • Search Google Scholar
    • Export Citation
  • 8.

    O'Regan, B, Gratzel, M. 1991. A low-cost, high-efficiency solar cell based on dye-sensitized colloidal TiO2 films. Nature. 353:737740 .

  • 9.

    Bach, U, Lupo, D, Comte, P, Moser, JE, Weissortel, F, Salbeck, J, Spreitzer, H, Gratzel, M. 1998. Solid-state dye-sensitized mesoporous TiO2 solar cells with high photon-to-electron conversion efficiencies. Nature. 395:583585 .

    • Crossref
    • Search Google Scholar
    • Export Citation
  • 10.

    Shang, J, Chai, M, Zhu, YF. 2003. Photocatalytic degradation of polystyrene plastic under fluorescent light. Environ Sci Technol. 37:44944499 .

  • 11.

    Chatterjee, D, Mahata, A. 2002. Visible light induced photodegradation of organic pollutants on dye adsorbed TiO2 surface. J Photochem Photobiol A. 153:199204 .

    • Crossref
    • Search Google Scholar
    • Export Citation
  • 12.

    Wu, TX, Liu, GM, Zhao, JC, Hidaka, H, Serpone, N. 1998. Photoassisted degradation of dye pollutants. V. Self-photosensitized oxidative transformation of rhodamine B under visible light irradiation in aqueous TiO2 dispersions. J Phys Chem B. 102:58455851 .

    • Crossref
    • Search Google Scholar
    • Export Citation
  • 13.

    Moser, J, Gratzel, M. 1984. Photosensitized electron injection in colloidal semiconductors. J Am Chem Soc. 106:65576564 .

  • 14.

    Cheung, STC, Fung, AKM, Lam, MHW. 1998. Visible photosensitization of TiO2-photodegradation of CCl4 in aqueous medium. Chemosphere. 36:24612473 .

    • Crossref
    • Search Google Scholar
    • Export Citation
  • 15.

    Ikeda, A, Abe, C, Torimoto, T, Ohtani, B. 2003. Photochemical hydrogen evolution from aqueous triethanolamine solutions sensitized by binaphthol-modified titanium (IV) oxide under visible-light irradiation. J Photochem Photobiol A. 160:6167 .

    • Crossref
    • Search Google Scholar
    • Export Citation
  • 16.

    Song, L, Qiu, RL, Mo, YQ, Zhang, DD, Wei, H, Xiong, Y. 2007. Photodegradation of phenol in a polymer-modified TiO2 semiconductor particulate system under the irradiation of visible light. Catal Commun. 8:429433 .

    • Crossref
    • Search Google Scholar
    • Export Citation
  • 17.

    Rehman, S, Ullah, R, Butt, AM, Gohar, ND. 2009. Strategies of making TiO2 and ZnO visible light active. J Hazard Mater. 170:560569 .

  • 18.

    Wang, DS, Wang, YH, Li, XY, Luo, QZ, An, J, Yue, HX. 2008. Sunlight photocatalytic activity of polypyrrole–TiO2 nanocomposites prepared by ‘in situ’ method. Catal Commun. 9:11621166 .

    • Crossref
    • Search Google Scholar
    • Export Citation
  • 19.

    Zhu, YF, Xu, SB, Jiang, L, Pan, KL, Dan, Y. 2008. Synthesis and characterization of polythiophene/titanium dioxide composites. React Funct Polym. 68:14921498 .

    • Crossref
    • Search Google Scholar
    • Export Citation
  • 20.

    Li, XY, Wang, DS, Cheng, GX, Luo, QZ, An, J, Wang, YH. 2008. Preparation of polyaniline-modified TiO2 nanoparticles and their photocatalytic activity under visible light illumination. Appl Catal B. 81:267273 .

    • Crossref
    • Search Google Scholar
    • Export Citation
  • 21.

    Salem, MA, Al-Ghonemiy, AF, Zaki, AB. 2009. Photocatalytic degradation of allura red and quinoline yellow with Polyaniline/TiO2 nanocomposite. Appl Catal B. 91:5966 .

    • Crossref
    • Search Google Scholar
    • Export Citation
  • 22.

    Wang, YZ, Zhong, MQ, Chen, F, Yang, JT. 2009. Visible light photocatalytic activity of TiO2/D-PVA for MO degradation. Appl Catal B. 90:249254 .

    • Crossref
    • Search Google Scholar
    • Export Citation
  • 23.

    Gather, MC, Bradley, DDC. 2007. An improved optical method for determining the order parameter in thin oriented molecular films and demonstration of a highly axial dipole moment for the lowest energy π–π∗ optical transition in poly(9,9-dioctylfluorene-co-bithiophene). Adv Funct Mater. 17:479485 .

    • Crossref
    • Search Google Scholar
    • Export Citation
  • 24.

    Zyung, T, Kim, JJ. 1995. Photodegradation of poly(p-phenylenevinylene) by laser light at the peak wavelength of electroluminescence. Appl Phys Lett. 67:34203422 .

    • Crossref
    • Search Google Scholar
    • Export Citation