Email the author Synthesis, Optical, Photo- and Electrocatalytic Properties of Nanosized TiO2 Films Modified with Transition Metal Ions
Abstract
Mesoporous nanosized TiO2 films modified with Co2+, Ni2+, Mn3+ and Cu2+ ions have been produced by templated sol-gel method and characterized by optical spectroscopy, ellipsometry and XRD. Catalytic activity of prepared films in the Cr(VI) anion photoreduction and in the oxygen electroreduction have been tested. Improvement of photocatalytic ativity in comparison with unmodified TiO2 has been observed for systems with dopant concentration of 1–7% (depending on the metal). 1% content for all dopants has been found to be optimum in the process of oxygen electroreduction. Synthesized coverings can be used as effective photocatalysts and sensor elements.
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References
Zhu J., Zäch M. Nanostructured materials for photocatalytic hydrogen production // Cur. Opin. Colloid Interface Sci. – 2009. – V. 14. – P. 260–269.
Choi V W., Termin A., Hoffmann M.R. The role of metal ion dopants in quantumsized TiO2: correlation between photoreactivity and charge carrier recombination dynamics // J. Phys. Chem. – 1994. – V. 98. – P. 13669–13679.
Kiriakidou F., Kondarides D.I., Verykios X.E., The effect of operational parameters and TiO2-doping on the photocatalytic degradation of azo-dyes // Catal. Today. – 1999. – V. 54. – P. 119–130.
Umebayashi T., Yamaki T., Itoh H., Asai K. Analysis of electronic structures of 3d transition metal-doped TiO2 based on band calculations // J. Phys. Chem. Solids. – 2002. – V. 63. –P. 1909–1920.
Sreethawong T., Suzuki Y., Yoshikawa S. Photocatalytic evolution of hydrogen over mesoporous TiO2 supported NiO photocatalyst prepared by single-step sol-gel process with surfactant template // Int. J. Hydrogen Energy. – 2005. – V. 30. – P. 1053–1062.
Yao M., Chen J., Zhao C., Chen Y. Photocatalytic activities of ion doped TiO2 thin films when prepared on different substrates // Thin Solid Films. – 2009. – V. 517. – P. 5994–5999.
Кобаса И.М., Мазуркевич Я.С., Зозуля Н.И. Влияние фотохимической и восстановительной активации диоксида титана на его каталитические свойства в процессе осаждения металлической меди // Теорет. эксперим. химия. – 2004. – Т. 40, № 2. – C. 110–115.
Cai R., Kubota Y., Fujishima A. Effect of copper ions on the formation of hydrogen peroxide from photocatalytic titanium dioxide particles // J. Catal. – 2003. – V. 219. – P. 214–218.
Smirnova N., Eremenko A., Gayvoronskij V. et al. Sol-gel processed functional nanosized TiO2 and SiO2-based films for photocatalysts and other applications // J. Sol-Gel Sci. Technol. – 2004. – V. 32 – P. 357–362.
Єременко Г.М., Смірнова Н.П., Петрик І.С. та ін. Синтез та властивості пористих наноструктурних плівок, активних в екологічному фотокаталізі // Наносистеми, наноматеріали, нанотехнології. – 2004. – Т. 2, № 2. – C. 477–488.
Bakardjieva S., Subrt J., Stengl V. et al. Photoactivity of anatase–rutile TiO2 nanocrystalline mixtures obtained by heat treatment of homogeneously precipitated anatase // Appl. Catal. B. – 2005. – V. 58. – P. 193–202.
Akhtar M.K., Xiong Y., Pratsinis S.E. Vapor synthesis of titania powder by titanium tetrachloride oxidation // AIChE J. – 1991. – V. 37. – P. 1561–1570.
Rocquefelte X., Goubin F., Koo H.-J. et al. Investigation of the origin of the empirical relationship between refractive index and density on the basis of first principles calculations for the refractive indices of various TiO2 phases // Inorg. Chem. – 2004. – V. 43. – P. 2246–2251.
Denga Q.R., Xiaa X.H., Guo M.L. et al. Mn-doped TiO2 nanopowders with remarkable visible light photocatalytic activity // Mater. Lett. – 2011. – V. 65. – P. 2051–2054.
Ghasemi S., Rahimnejad S., Setayesh S. et al. Transition metal ions effect on the properties and photocatalytic activity of nanocrystalline TiO2 prepared in an ionic liquid // J. Hazard. Mater. – 2009. – V. 172. – P. 1573–1578.
Xu J.P., Shi S.B., Li L. et al. Effect of manganese ions concentration on the anatase–rutile phase transformation of TiO2 films // J. Phys. Chem. Solids. – 2009. – V. 70. – P. 511–515.
Вітюк Н., Дивінський Я., Єременко Г. та ін. Золь-гель синтез ТіО2/ZrО2 плівок для фотокаталітичного відновлення Cr(VI) у водному середовищі // Хімія, фізика та технологія поверхні. – 2003. – Вип. 9. – С. 76–81.
Феттер К. Электрохимическая кинетика. – Москва: Химия, 1967. – 856 с.
Колбасов Г.Я., Воробец В.С., Кордубан А.М. та ін. Электроды на основе нанодисперсных оксидов титана и вольфрама для сенсора растворённого кислорода // Журн. прикл. химии. – 2006. – Т. 79, № 4. – С. 605–610.
Copyright (©) 2011 I. S. Petrik, O. O. Kelyp, V. S. Vorobets, N. P. Smirnova, O. K. Frolova, O. I. Oranska, G. A. Kolbasov, A. M. Eremenko
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