Effects of Sulphuric Acid Treatment on Photocatalytic Red Dye of TiO₂ Films Prepared by Micro-Arc Oxidation

Abstract:

With tribasic sodium phosphate (Na3PO4) as electrolytic liquid, to adopt micro-arc oxidation (MAO) prepares titanium oxide films directly on the titanium net surface. In order to improve the photocatalytic activity of TiO2 films prepared by micro-arc oxidation, the titanium oxide films were treated by Sulphuric acid aqueous. The structures before and after surface acid treatment were characterized by XRD, SEM, EDX,and photocatalytic ability of titanium oxide coatings were evaluated by photocatalytic degradation of acid brilliant scarlet dye aqueous solution . It was found out that the titanium oxide films were mainly made of titanium and anatase. The sodium at titanium dioxide/itanium (TiO2/Ti) film surface was reduced after the Sulphuric acid treatment. The photocatalytic activity of the titanium oxide films were enhanced after Sulphuric acid treatment. When Sulphuric acidaqueous concentration is 0.1mol•L-1 and soak time is 18 hours, the TiO2/Ti films photocatalytic degradation rate increased from 15% to 31%.

• Periodical: Advanced Materials Research (Volumes 113-116)
• Pages: 2357-2361
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.113-116.2357
• Online since: June 2010
• Authors: Hui Dong Su, Hong Lei Du
• Keywords: Micro-Arc Oxidation (MAO), Photocatalytic, Surface Acid Treatment, TiO₂

References

[1] A Fujishima, K honda: Electrochemical photolysis of water at a semiconductor electrode. Nature, 1972, 238: 37-38.

DOI: 10.1038/238037a0

[2] D. Robert: Photocatalytic detoxification with TiO2 supported on glass-fiber by using artificial and natural light. Catalysis Today 54（1999）: 291-296.

DOI: 10.1016/s0920-5861(99)00190-x

[3] Yu J G , Yu H G, Lei M, et al: Effects of CH3COOH Treatment on Photocattalytic Activity of TiO2 Nanometer Thin Films. Acta Chimica Sinica. 2003. 61(8): 1271-1275.

[4] Cui Y, Du H. Enhancement of photoelectrocatalytic properties of stainless-steel/TiO2 electrode by applying mid-frequency electric field. Environ Chem Lett(2009)7: 321-324.

DOI: 10.1007/s10311-008-0172-z

[5] Wu J R, Qiu K: Preparation of nanosized TiO2 thin film electrodes by metal-organic chemical vapor deposition and its application. New Chemical Materials. 2008. 36(9): 71-73.

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

[7] Cui H, Dwighi K, Soled S, et al: Surface acidity and photocatalytic activity of Nb2/TiO2 photocatalysis. Journal of Solid State Chemisty. 1995: 115(1)187-191.

DOI: 10.1006/jssc.1995.1118

[8] Sun H J, Liu H L: Preparation of Cerium-doped TiO2/Ti Photoelectrodesand photoelectrocatalytic Performance under Visible Light. Journal of Inorganic Materials. 2007. 22(6): 1065-1069.

[9] Zhang X, Zhao Y, Zhang C B: Synthesis of TiO2-SiO2 Ccmplex Material and Its photocatalytic Property. Journal of Northeastern university(Natural Science) 2004, 25（3）: 269-272.

[10] Ouafa Tahiri Alaoui, et al: Preparation and characterization of a new TiO2/SiO2 composite catalyst for photocatalytic degradation of indigo carmin. Environ Chem Lett(2009)7: 175-181.

DOI: 10.1007/s10311-008-0154-1

[11] Li H, Zhao G L: Influnce of silicon doping and silicon vanadium co-Doping on photocatalyst property of TiO2 thin films. Journal of the chinese ceramic society. 2005. 33(6): 784-788.

[12] Zhou Z X: electrochemical Preparation of Highly Active TiO2/SiO2 Composite Film and Its Application in photoelectrocatalytic DegradationHuazhong University of Science and Technology. (2009).

[13] Yang J, Dai J, et al: Mechanism on Photocatalytic Degradation of Benzoic Acid with TiO2-film Electrode. Acta Chimica Sinica. 2009, 67(17): 1973-(1980).

[14] Huang P, Xu K W, Han Y, et al: Character and Mechanism of the film by Micro-arc Oxidation on Titanium Alloy. Rare metal materials and engineering. 2003, 32（4）: 272-275.

[15] Chen X Y, et al: Electric Puncture of Micro-arc Oxidation on Titanium surface. Journal of South China University of Technolog (Natural Science Edition). 2009, 37(8): 145-149.

[16] Wang Y M, Jiang B L, Guo L X: Growth and microstructure of microarc oxidation coatings on titanium alloy in solution containing phosphate. The Chinese Journal of Nonferrous Metal. 2004, 14 （4）: 548-553.

DOI: 10.1016/j.apsusc.2004.03.231

[17] Liu L, et al: Effect of electrolyte on medical TC4 titanium alloy by micro-arc oxidation. Heat Treatment of Metals. 2010. 35(1): 77-80.

[18] He J. Cai Q Z, et al: Structure and Photocatalytic Properties of WO3/TiO2 Composite Film by Microarc Oxidation. Chinese Journal of Catalysis. 2009, 30(11): 1137-1142.

[19] O Beruhisa, H Dsisuke, F Kan, et al: Effects of Iron on Photocatalytic and Photoelectrochemical Properties of Titanium Dioxide . J. Phys. Chem . B 1977 . 101: 6415-6419.

[20] Yue L H, Shui M, Xu T D, et al: The A-R transformation and photocatalytic activity of mixed TiO2 rare earth oxides. Journal of Zhejiang university (sciences edition). 2000. 27（1）: 69-74.

[21] Shao Z C, et al: Photocatalytic properties of TiO2 thin films prepared by Microarc Oxidation and doping electrolytes. Acta Metallurgica Sinica. 2008, 44(10): 1238-1242.

[22] T Ranji, H Cohen, Willner, et al: Lanthanide oxidedoped titanium dioxide effective photocatalysis for degradation of organic pollutants J . Mater . Sci. 1999, 34: 5273-5277.