Advertisement

Significant photocatalytic enhancement in methylene blue degradation of Bi2WO6 photocatalysts via graphene hybridization

  • 1900 Accesses

  • 27 Citations

Abstract

The hybridization of graphene with Bi2WO6 photocatalysts was employed to enhance the photocatalytic activity. The photocatalytic activity enhancements were dependent on the amount of graphene and it was found that the optimal hybridized amount of graphene was about 1.5 wt%, which was close to the monolayer dispersing of graphene on Bi2WO6 surface. Up to four times of the photocatalytic activity was enhanced by the hybridization of graphene, compared with that of pristine Bi2WO6. The enhancement mechanism of the photocatalytic activity was attributed to the higher separation efficiency and the inhibition of recombination of photoinduced electron-hole pairs. The electronic interaction was verified by the photoelectrochemical measurements.

References

  1. [1]

    Fujishima A, Honda K. Electrochemical photolysis of water at a semiconductor electrode. Nature 1972, 238: 37–38.

  2. [2]

    Liu GM, Li XZ, Zhao JC. Photooxidation pathway of sulforhodamine-B. dependence on the adsorption mode on TiO2 exposed to visible light radiation. Environ Sci Technol 2000, 34: 3982–3990.

  3. [3]

    Asahi R, Morikawa T, Ohwaki T, et al. Visible-light photocatalysis in nitrogen-doped titanium oxides. Science 2001, 293: 269–271.

  4. [4]

    Zhang JY, Zhu HL, Zheng SK, et al. TiO2 Film/Cu2O microgrid heterojunction with photocatalytic activity under solar light irradiation. Appl Mater Int 2009, 1: 2111–2114.

  5. [5]

    Tatsuda N, Itahara H, Setoyama N, et al. Preparation of titanium dioxide/activated carbon composites using supercritical carbon dioxide. Carbon 2005, 43: 2358–2365.

  6. [6]

    Zhang XY, Li HP, Cui XL. Preparation and photocatalytic activity for hydrogen evolution of TiO2/graphene sheets composite. Chin J Inor Chem 2009, 25: 1903–1907.

  7. [7]

    Chatterjee D, Dasgupta S. Visible light induced photocatalytic degradation of organic pollutants. J Photochem Photobio C: Photochem Rev 2005, 6: 186–192.

  8. [8]

    Fu HB, Zhang LW, Yao WQ, et al. Photocatalytic properties of nanosized Bi2WO6 catalysts synthesized via a hydrothermal process. Appl Catal B: Environ 2006, 66: 100–110.

  9. [9]

    Wu L, Bi JH, Li ZH, et al. Rapid preparation of Bi2WO6 photocatalyst with nanosheet morphology via microwave-assisted solvothermal synthesis. Catal Today 2008, 131: 15–20.

  10. [10]

    Shang M, Wang WZ, Zhang L, et al. Bi2WO6 with significantly enhanced photocatalytic activities by nitrogen doping. Mater Chem Phys 2010, 120: 155–159.

  11. [11]

    Woan K, Pyrgiotakis G, Sigmund W. Photocatalytic Carbon-Nanotube-TiO2 composites. Adv Mater 2009, 21: 2233–2239.

  12. [12]

    Li YY, Liu JP, Huang XT, et al. Carbon-modified Bi2WO6 nanostructures with improved photocatalytic activity under visible light. Dalton Trans 2010, 39: 3420–3425.

  13. [13]

    Zhu SB, Xu TG, Fu HB, et al. Synergetic effect of Bi2WO6 photocatalyst with C-60 and enhanced photoactivity under visible irradiation. Environ Sci Technol 2007, 41: 6234–6239.

  14. [14]

    Zhang LW, Fu HB, Zhu YF. Efficient TiO2 photocatalysts from surface hybridization of TiO2 particles with graphite-like carbon. Adv Funct Mater 2008, 18: 2180–2189.

  15. [15]

    Zhang LW, Cheng HY, Zong RL, et al. Photocorrosion suppression of ZnO nanoparticles via hybridization with graphite-like carbon and enhanced photocatalytic activity. J Phys Chem C 2009, 113: 2368–2374.

  16. [16]

    Wang YJ, Shi R, Lin J, et al. Significant photocatalytic enhancement in methylene blue degradation of TiO2 photocatalysts viagraphene-like carbon in situ hybridization. Appl Catal B: Environ 2010, 100: 179–183.

  17. [17]

    Xu TG, Zhang LW, Cheng HY, et al. Significantly enhanced photocatalytic performance of ZnO via graphene hybridization and the mechanism study. Appl Catal B: Environ 2011, 101: 382–387.

  18. [18]

    Zhou F, Shi R, Zhu YF. Significant enhancement of the visible photocatalytic degradation performances of γ-Bi2MoO6 nanoplate by graphene hybridization. J Mol Catal A: Chem 2011, 340: 77–82.

  19. [19]

    Gao EP, Wang WZ, Shang M, et al. Synthesis and enhanced photocatalytic performance of graphene-Bi2WO6 composite. Phys Chem Chem Phys 2011, 13: 2887–2893.

  20. [20]

    Ying H, Wang ZY, Guo ZD, et al. Reduced graphene oxide-modified Bi2WO6 as an improved photocatalyst under visible light. Acta Phys Chim Sinica 2011, 27: 1482–1486.

  21. [21]

    Hummers WS, Offeman RE. Preparation of graphitic oxide. J Am Chem Soc 1958, 80: 1339–1339.

  22. [22]

    Wang D, Choi D, Li J, et al. Self-assembled TiO2-graphene hybrid nanostructures for enhanced Li-Ion insertion. ACS Nano 2009, 3: 907–914.

  23. [23]

    Li D, Muller MB, Gilje S, et al. Processable aqueous dispersions of graphene nanosheets. Nature Nanotechnology 2008, 3: 101–105.

  24. [24]

    Zhang H, Zong RL, Zhu YF. Photocorrosion inhibition and photoactivity enhancement for Zinc Oxide via hybridization with monolayer polyaniline. J Phys Chem C 2009, 113: 4605–4611.

  25. [25]

    Cao A, Liu Z, Chu S, et al. A facile one-step method to produce Graphene-CdS quantum dot nanocomposites as promising optoelectronic materials. Adv Mater 2010, 22: 103–106.

  26. [26]

    Xu T, Cai Y, O’Shea KE, et al. Adsorption and photocatalyzed oxidation of methylated arsenic species in TiO2 suspensions. Environ Sci Technol 2007, 41: 5471–5477.

Download references

Author information

Correspondence to Feng Zhou.

Additional information

This article is published with open access at Springerlink.com

Rights and permissions

Open Access This article is distributed under the terms of the Creative Commons Attribution 2.0 International License (https://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Reprints and Permissions

About this article

Cite this article

Zhou, F., Zhu, Y. Significant photocatalytic enhancement in methylene blue degradation of Bi2WO6 photocatalysts via graphene hybridization. J Adv Ceram 1, 72–78 (2012) doi:10.1007/s40145-012-0008-y

Download citation

Key words

  • powders-chemical preparation
  • carbon
  • nanocomposites
  • photocatalyst