Study on Photoelectrocatalytic of Three-Dimensional Electrode Using TiO₂ Coated γ-Al₂O₃ and Scrap Iron Particle Electrode

Abstract:

Titanium oxide coatings(TiO₂/Ti) were formed on the titanium surface by micro-arc oxidation(MAO) in Na₃PO₄ solution.And using the TiO₂/Ti as anod electrode, the titanium as counter electrode in the system of three-dimensional electrode.Coated γ- Al₂O₃ (TiO₂/γ-Al₂O₃) that prepared by sol-gel dipcoating method ,and scrap iron mixture as particle electrode, combining with the UV lamp and regulated power supply make up the three-dimensional electrode photoelectrocatalysis system. The photoelectrocatalysis system use 0.02M Na₂SO₄ aqueous solution as supporting electrolyte.The photoelectrocatalytic ability of titanium oxide coatings were evaluated by photoelectrocatalytic degradation of methylene blue aqueous solution.The experiment demonstrate that compare to photoelectrocatalytic degradation of single TiO₂/Ti film and only adsorbtion, the photoelectrocatalysis of three-dimensional electrode with coated particle electrode have the synergistic effect with them, which can improve the degradation of methylene blue aqueous solution. When the methylthionine chloride concentration of 5mg/L, cell voltage of 7V. The three-dimensional electrode photoelectrocatalysis degradation of methylene blue compare to traditional two-dimensional plate electrodes which without particle electrode increase 43.35% after 3 hours photoelectrocatalysis.

• Periodical: Applied Mechanics and Materials (Volumes 71-78)
• Pages: 972-975
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.71-78.972
• Online since: July 2011
• Authors: Hui Dong Su, Hong Lei Du
• Keywords: Micro-Arc Oxidation (MAO), Photoelectrocatalysis, Three-Dimensional Electrode

References

[1] Wu J R, Qiu K. New Chemical Materials. 2008. 36(9): 71-73. (in Chinese).

[2] Masao Kaneko, Hirohito Ueno, Rie Saito, Junichi Nemoto. Catal Lett(2009)131: 184–188.

[3] Cui Y, Du H. Environ Chem Lett(2009)7: 321–324. (in Chinese).

[4] Yang J, Dai J. Acta Chimica Sinica. 2009, 67(17): 1973-1980. (in Chinese).

[5] Cui H, Dwighi K, Soled S. Journal of Solid State Chemisty. 1995: 115(1)187-191.

[6] Sun H J, Liu H L. Journal of Inorganic Materials. 2007. 22(6): 1065-1069.

[7] Shao Z C, et al. 2008, 44(10): 1238-1242. (in Chinese).

[8] O Beruhisa, H Dsisuke, F Kan, et al. Chem . B 1977 . 101: 6415-6419.

[9] CHEN Yu-Juan. Acta Phys. -Chim. Sin., 2008, 24(9): 1589-1596.

[10] Zhang J L, et al. Molecular catalytic journals. 2009, 23(6): 574-577. (in Chinese).