Abstract
Biofouling is one of the major concerns in the use of titanium, an excellent material with respect to corrosion resistance and mechanical properties, for seawater-cooled condensers of power plants. Earlier studies conducted in our laboratory have shown that anodized titanium with a thin film of anatase (TiO2) inhibits attachment of Pseudomonas sp. of bacteria when illuminated with near-UV light (350–380 nm) from black light blue (BLB) florescent lamps. The following work compares the photocatalytic efficiencies of anodized commercially pure titanium (grade 2) and Ti6Al4V alloy, in order to understand the role of the alloying elements such as Al and V on the photocatalytic activity in relation to inhibition of microbial attachment. The study was carried out by employing both methylene blue (MB) dye degradation as well as microbial adhesion experiments under near-UV light illumination. The results have shown that the anodized Ti6Al4V surfaces showed an order of magnitude increase in photocatalytic activity, as shown by the decrease in microbial attachment compared to titanium grade-2. The oxide film on both the surfaces has been characterized using Glancing Incidence X-ray Diffraction (GIXRD) and Atomic Force Microscopy (AFM). The GIXRD and AFM results showed that the oxide formed on anodized Ti6Al4V surface has higher crystallinity and is composed of particles, which are smaller in size; both these attributes are reported to enhance the photocatalytic activity. Since, vanadium is reported to shift the photo-response of the photoactive anatase thin film into visible range, the photocatalytic activity of anodized Ti6Al4V was also studied under visible light and it was observed that the surfaces showed significant photocatalytic activity even under visible light.
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References
Blake DM, Webb J, Turch C, Magrini K (1991) Solid Energy Mater 24:584
Gerischer H, Heller A (1991) J Phys Chem 95:526
Matthew RW (1988) J Catal 111:264
Bickley RI, Carreno TG, Less JS, Palmissano L, Tilley RJD (1991) J Solid state Chem 92:178
Matsunaga T, Tomada R, Nakajima T, Wake H (1985) FEMS Microbiol Lett 29:211
Matsunaga T, Tomada R, Nakajima T, Nakamura N, Komine T (1988) Appl Environ Microbiol 54:1330
Muraleedharan P, Gopal J, George RP, Khatak HS (2003) Curr Sci 84:1
Gopal J, George RP, Muraleedharan P, Kalavathi S, Khatak HS (2004) In: Proceedings of 12th national council for corrosion control, Vizakapattinam
Gopal J, George RP, Muraleedharan P, Kalavathi S, Mangamma G, Khatak HS (2004) In: Proceedings of international symposium for research scholars, IIT Chennai, 2004
Asahi R, Morikawa T, Ohwaki T, Aoki K, Taga Y (2001) Science 293:269
Anpo M, Ichihashi Y, Takeuchi M, Yamashita H (1998) Res Chem Intermediates 24(42):143
Zhao G, Kozua H, Lin H, Yoko T (1999) Thin Solid Films 339:123
Karvinen SM (2003) Indian Eng Chem Res 42:1035
Rao TS, George RP, Venugopalan VP, Nair KVK (1997) Biofouling 11:265
George RP, Muraleedharan P, Sreekumari KR, Khatak HS (2003) Biofouling 19(1):1
APHA (1989) Standard methods for the examination of water and wastewater, 14th edn. APHA, USA
Mah TC, O’Toole GA (2001) Trends Microbiol 9:34
Chen Y, Wang K, Lou L (2004) J Photochem Photobiol A 163:281
Ohtani B, Kakimoto M, Nishimoto S, Kagiya T (1993) J Photochem Photobiol A 70(3):265
Yu JG, Zhao XJ, Zang GK, Han JJ, Zhao QN (2001) J Wuhan Univ Technol – Mater Sci 16(2):123
Chen Y, Wang K, Lou L (2004) J Photochem Photobiol A 163:281
Gopal J, George RP, Muraleedharan P, Khatak HS (2004) Biofouling 20(3):167
He C, Yu Y, Hu X, Larbot A (2002) Appl Surf Sci 200:239
Piera E, Isabel Tejedor-Tejedor M, Zorn ME, Anderson MA (2003) Appl Catal B: Environ 46:671
Jeffrey C, Wu S, Chen C (2004) J Photochem Photobiol A 163:509
Acknowledgement
The authors thank Dr. V.S. Raghunathan, Former Associate Director, MCG for all his valuable discussions and suggestions. We are grateful to our Director Dr. Baldev raj for his constant support and encouragement.
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Gopal, J., George, R.P., Muraleedharan, P. et al. Photocatalytic inhibition of microbial fouling by anodized Ti6Al4V alloy. J Mater Sci 42, 5152–5158 (2007). https://doi.org/10.1007/s10853-006-1286-y
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DOI: https://doi.org/10.1007/s10853-006-1286-y