Estimating the degradation of methylethionium chloride dye on nanotubular TiO2 structure

K.M. Deen; A. Farooq; M.A. Raza; R. Ahmad; W. Haider

Journal of Industrial and Engineering Chemistry, Vol.22, 153-158, February, 2015

DOI10.1016/j.jiec.2014.07.003 Export Citation

Estimating the degradation of methylethionium chloride dye on nanotubular TiO2 structure

K.M. Deen^{1, 2}, A. Farooq^{1, 2}, M.A. Raza^{1, 3}, R. Ahmad^{1, 3}, and W. Haider^{4, †}

¹Department of Metallurgy and Materials Engineering, CEET, University of the Punjab, 54590 Lahore, Pakistan
²Corrosion Control Research Cell, CEET, University of the Punjab, Lahore, Pakistan
³, Pakistan
⁴Mechanical Engineering Department, The University of Texas Pan American, Edinburg, TX 78539, USA

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In this study the photocatalytic behavior of as-anodized and heat treated surfaces of Ti6Al4V was investigated electrochemically in methylethionium chloride solution in dark and under illumination at 60Wand 100 W. X-ray diffraction pattern of as-anodized surface revealed oxygen deficient Ti6O phase, which was converted to rutile/anatase phases by heat treatment in air. Potentiodynamic scans showed variation in current density during anodic polarization due to the electronic traps within sub-band energy states by the amorphous nature of as formed structure hence lower catalytic activity than heattreated specimen. Impedance spectroscopy of heat-treated surface in dye solution under dark and light depicted lower charge transfer resistance, recombination admittance and higher charge transfer coefficient than as-anodized. The UV.vis spectroscopy of heat treated TiO2 nanotubular structure represented 45.05% photocatalytic efficiency.

Keywords:Nanotubular;Electrochemical;Photocatalytic;Impedance spectroscopy

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[1] Roy P, Berger S, Schmuki P, Angew. Chem.-Int. Edit., 50, 2904 (2011)

[2] Williams DF, Biocompatibility of Clinical Implant Materials, vol. 1, CRC Press, 1981, pp. 9-44.

[3] Bozzini B, Carlino P,D’Urz L, Pepe V, Mele C, Venturo F, J. Mater. Sci., 19, 3443 (2008)

[4] Asahi R, Taga Y, Mannstadt W, Freeman AJ, Phys. Rev. B, 61, 7459 (2000)

[5] Wu ZY, Ouvrared G, Gressier P, Natoli CR, Phys. Rev. B, 55, 10382 (1997)

[6] Fujishima A, Zhang X, Tryk DA, Surf. Sci. Rep., 63, 515 (2008)

[7] Xie YB, Electrochim. Acta, 51(17), 3399 (2006)

[8] Lai YK, Sun L, Chen YC, Zhuang HF, Lin CJ, Chin JW, J. Electrochem. Soc., 153(7), D123 (2006)

[9] Paramasivam I, Macak JM, Ghicov A, Schmuki P, Chem. Phys. Lett., 445(4-6), 233 (2007)

[10] Macak JM, Zlamal M, Krysa J, Schmuki P, Small, 3, 300 (2007)

[11] Deen KM, Farooq A, Raza MA, Haider W, Electrochim. Acta, 117, 329 (2014)

[12] Hardcastle FD, J. Arkansas Acad., 65, 43 (2011)

[13] Gupta SK, Desai R, Prafulla KJ, Sahoob S, Kirinc D, J. Raman Spectrosc., 41, 350 (2010)

[14] Barsonkov E, Macdonald JR, Impedance Spectroscopy: Theory, Experiment and Applications, 2nd ed., A John Wiley & Sons, New York, 2005.

[15] Nah YC, Paramasivam I, Schmuki P, ChemphysChem, 11, 2698 (2010)

[16] Rose A, Concepts in Photoconductivity and Allied Problems, Interscience, New York, 1963.

[17] Ao Y, Xu J, Fu D, Yuan C, Microporous Mesoporous Mater., 122, 1 (2009)

[18] Jalalah M, Faisal M, Bouzid H, Ismail AA, Al-Sayari SA, Mater. Res. Bull., 48(9), 3351 (2013)