Methyl Orange Photoelectrocatalytic Degradation Using Porous TiO₂ Film Electrode in NaH₂PO₄ Solution

Abstract:

Porous TiO₂ film was prepared by a sol-gel method using PEG1000 as pore forming template. The porous film and normal film were used as electrodes in a photoelectrocatalytic reactor. The functions of applied potential and concentration of NaH₂PO₄ to the photoelectrocatalytic degradation process of methyl orange were investigated. The results show that methyl orange cannot be degraded solely by the applied potential. Under the applied potential of 2 V, 49.9% of the initial dye can be removed on the normal TiO₂ film electrode, which is much better than the 31.1% removal rate on the porous TiO₂ film electrode. The normal TiO₂ film electrode has better performance than the porous TiO₂ film in the whole NaH₂PO₄ concentration range. After 80 min of reaction, degradation rate is 93.7% on the normal TiO₂ film electrode. After 100 min of reaction, degradation rate is 89.7% on the porous TiO₂ film electrode.

• Periodical: Advanced Materials Research (Volumes 433-440)
• Pages: 411-415
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.433-440.411
• Online since: January 2012
• Authors: Wen Jie Zhang, Ke Xin Li, Jia Wei Bai
• Keywords: Methyl Orange (MO), NaH₂PO₄, Photoelectrocatalytic Degradation, Porous TiO₂ Film

References

[1] G. L. Baughman, and E. J. Weber, Transformation of dyes and related-compunds in anoxic sediment-kinetics and products, Environ. Sci. Technol. vol. 28, pp.267-276, (1994).

DOI: 10.1021/es00051a013

[2] E. J. Weber, and R. L. Adams, Chemical-mediated and sediment-mediated reduction of the azo-dye desperse-blue-79, Environ. Sci. Technol. vol. 29, pp.1163-1170, (1995).

DOI: 10.1021/es00005a005

[3] G. Liu, X. Li, J. Zhao, S. Horikoshi, and H. Hidaka, Photooxidation mechanism of dye alizarin red in TiO2 dispersions under visible illumination: an experimental and theoretical examination, J. Mol. Catal. A vol. 153, pp.221-229, (2000).

DOI: 10.1016/s1381-1169(99)00351-9

[4] T. Yang, S. Wang, S. Tsai, and S. Lin, Intrinsic photocatalytic oxidation of the dye adsorbed on TiO2 photocatalysts by diffuse reflectance infrared Fourier transform spectroscopy, Appl. Catal. B vol. 30, pp.293-301, (2001).

DOI: 10.1016/s0926-3373(00)00241-1

[5] G. Liu, X. Li, J. Zhao, H. Hidaka, and N. Serpone, Photooxidation pathway of sulforhodamine-B. Dependence on the adsorption mode on TiO2 exposed to visible light radiation, Environ. Sci. Technol. Vol. 34, pp.3982-3990, (2000).

DOI: 10.1021/es001064c

[6] K. Hashimoto, H. Irie, and A. Fujishima, TiO2 Photocatalysis: A Historical Overview and Future Prospects, Jpn. J. Appl. Phys. vol. 44, pp.8269-8285, (2005).

DOI: 10.1143/jjap.44.8269

[7] Z. Q. Gao, S. G. Yang, N. Ta, and C. Sun, Microwave assisted rapid and complete degradation of atrazine using TiO2 nanotube photocatalyst suspensions, J. Hazard. Mater. vol. 145, pp.424-430, (2007).

DOI: 10.1016/j.jhazmat.2006.11.042

[8] W. J. Zhang, K. L. Wang, Y. Yu, and H. B. He, TiO2/HZSM-5 nano-composite photocatalyst: HCl treatment of NaZSM-5 promotes photocatalytic degradation of methyl orange, Chem. Eng. J. vol. 163, pp.62-67, (2010).

DOI: 10.1016/j.cej.2010.07.042

[9] C. He, X. Z. Li, N. Graham, and Y. Wang, Preparation of TiO2/ITO and TiO2/Ti photoelectrodes by magnetron sputtering for photocatalytic application, Appl. Catal. A vol. 305, pp.54-63, (2006).

DOI: 10.1016/j.apcata.2006.02.051

[10] T. A. McMurray, P. Dunlop, and J. A. Byrne, The photocatalytic degradation of atrazine on nanoparticulate TiO2 films, J. Photochem. Photobiol. A, vol. 182, pp.43-51, (2006).

DOI: 10.1016/j.jphotochem.2006.01.010

[11] N. Arconada , R. Portelab, J. M. Coronado, and Y. Castro, Synthesis and photocatalytic properties of dense and porous TiO2-anatase thin films prepared by sol-gel, Appl. Catal. B vol. 86, pp.1-7, (2009).

DOI: 10.1016/j.apcatb.2008.07.021

[12] W. Y. Gan , H. J. Zhao, and R. Amal, Photoelectrocatalytic activity of mesoporous TiO2 thin film electrodes, Appl. Catal. A vol. 354, pp.8-16, (2009).

DOI: 10.1016/j.apcata.2008.10.054

[13] A. O. Ibhadon, G. M. Greenway, Y. Yue, P. Falaras, and D. Tsoukleris, The photocatalytic activity and kinetics of the degradation of an anionic azo-dye in a UV irradiated porous titania foam, Appl. Catal. B vol. 84 pp.351-355, (2008).

DOI: 10.1016/j.apcatb.2008.04.019

[14] S. Q. Zhang, D. L. Jiang, and H. J. Zhao, Development of chemical oxygen demand on-Line monitoring system based on a photoelectrochemical degradation principle, Envir. Sci. Technol. vol. 40, pp.2363-2368, (2006).

DOI: 10.1021/es052018l

[15] A. L. Linsebigler, G. Q. Lu, and J. T. Yates, Photocatalysis on TiO2 Surfaces: Principles, Mechanisms, and Selected Results, Chem. Rev. vol. 95, pp.735-758, (1995).

DOI: 10.1021/cr00035a013