Using a low-temperature, simple, and economic processing technique, TiO2 nanoparticles (rutile phase) are immobilized in an inorganic matrix and then deposited on glass for bacteria inactivation in water. Using this low thermal budget method (maximum processing temperature of 220 °C), thin films of immobilized TiO2 nanoparticles are obtained so that practical water decontamination after UV radiation is possible by avoiding the additional step of catalyst separation from treated water. In order to validate the photocatalytic activities of these TiO2 nanoparticles (prepared as thin films), they were tested for bacteria inactivation in water under UV–A radiation (λ > 365 nm), while extensive characterizations by dynamic light scattering, X-ray diffraction, ultra violet–visible absorption spectroscopy, fourier-transform infra red spectroscopy, and profilometry were also carried out. Despite previous reports on the low or lack of photocatalytic activity of rutile-phase TiO2, inactivation of Escherichia coli in water was observed when thin films of this material were used when compared with the application of UV radiation alone. Physical characterization of the films suggests that size and concentration-related effects may allow the existence of photocatalytic activity for rutile-TiO2 as long as they are exposed under UV–A radiation, whereas no effect on bacteria inactivation was observed for thin films in the absence of TiO2 or radiation. In brief, a low thermal budget process applied to thin films based on TiO2 nanoparticles has shown to be useful for bacteria inactivation, while possible application of these films on widely available substrates like polyethylene terephthalate materials is expected.
This is a preview of subscription content, access via your institution.
Buy single article
Instant access to the full article PDF.
Tax calculation will be finalised during checkout.
Qu X, Alvarez PJJ, Li Q (2013) Water Res 47(12):3931
Chong MN, Jin B, Chow CWK, Saint C (2010) Water Res 44(10):2997
Dey T (ed) (2012) Nanotechnology for water purification. Brown Walker Press, Boca Raton
Banerjee AN (2011) Nanotechnol Sci Appl 4(1):35
Nakata K, Fujishima A (2012) J Photochem Photobiol C 13(3):169
Ding Z, Lu GQ, Greenfield PF (2000) J Phys Chem B 104(19):4815
Kandiel TA, Dillert R, Feldhoff A, Bahnemann DW (2010) J Phys Chem C 114(11):4909
Behnajady MA, Modirshahla N, Shokri M, Rad b (2008) Glob NEST J 10(1):1
Kim DH, Choi DK, Kim SJ, Lee KS (2008) Catal Commun 9(5):654
He J, Liu Q, Sun Z, Yan W, Zhang G, Qi Z, Xu P, Wu Z, Wei S (2010) J Phys Chem C 114(13):6035
Diwald O, Thompson TL, Goralski EG, Walck SD, Yates JT (2004) J Phys Chem B 108(1):52
Valentin CD, Pacchion G, Selloni A (2004) Phys Rev B 70(8):085116
Hsu SW, Yang TS, Chen TK, Wong MS (2007) Thin Solid Films 515(7–8):3521
Molina J, Munoz AL, Torres A, Landa M, Alarcon P, Escobar M (2011) Mater Sci Eng B 176(17):1353
Tauc J (1968) Mater Res Bull 3(1):37
Pankove JI (ed) (1984) Semiconductors and semimetals, part B optical properties, chap 2: the optical absorption edge of a-Si: H. Academic Press, New York, p 11
Music S, Vincekovic NF, Sekovanic L (2011) Braz J Chem Eng 28(1):89
Lopez T, Sanchez E, Bosch P, Meas Y, Gomez R (1992) Mater Chem Phys 32(2):141
Murashkevich AN, Lavistkaya AS, Barannikova TI, Zharskii IM (2008) J Appl Spectrosc 75(5):730
Goldstein DN, McCormick JA, George SM (2008) J Phys Chem C 112(49):19530
Maira AJ, Coronado JM, Augugliaro V, Yeung KL, Conesa JC, Soria J (2001) J Catal 202(2):413
Swanepoel R (1983) J Phys E 16(1):1214
Sreemany M, Sen S (2004) Mater Chem Phys 83(1):169
Dharma J, Pisal A (2012) Simple method of measurement the band gap energy value of TiO2 in the powder form using UV/Vis/NIR spectrometer. Application Note. PerkinElmer Inc., Shelton
Valencia S, Marin JM, Restrepo G (2010) Open Mater Sci J 4(1):9
J. Molina thanks Alfredo Morales S. (Centro de Investigacion en Materiales Avanzados, CIMAV) for the latter's support on XRD measurements. This study was fully supported by the National Council of Science and Technology (CONACYT-Mexico).
About this article
Cite this article
Molina, J., Sanchez-Salas, J.L., Zuniga, C. et al. Low-temperature processing of thin films based on rutile TiO2 nanoparticles for UV photocatalysis and bacteria inactivation. J Mater Sci 49, 786–793 (2014). https://doi.org/10.1007/s10853-013-7761-3
- Photocatalytic Activity
- TiO2 Nanoparticles
- TiO2 Film