Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 348, Issue 1, Pages 198-205Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2010.04.002
Keywords
Sol-gel; Thin layers; Metal-doped TiO2; IPCE; Photocurrent; Photocatalysis
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Funding
- Grant Agency of the Academy of Sciences of the Czech Republic [KAN400720701, KAN3013707 01]
- Grant Agency of the Czech Republic [104/09/0694, 202/08/1009]
- Ministry of Education of the Czech Republic [1M0577]
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This study reports the preparation of thin nanoparticulate films of titanium dioxide and its modified version doped with a transition metal. The behavior of prepared films was described by means of their photocatalytic and photo-induced electrochemical properties. The TiO2 and M/TiO2 (M = Ag, Zr, Fe) thin films were produced via a standard sol-gel method using titanium n-butoxide, acetylacetone, and transition metal acetylacetonates as precursors. Prepared films were analyzed by a series of techniques involving XRD, Raman spectroscopy, SEM, AFM, and XPS. Their photocatalytic activity was monitored with the aid of decomposition of the model compound Rhodamine B in water. All films were then tested for their photo-induced electrochemical properties based on evaluation of polarization curves (photocurrents). The highest reaction rate constant (0.0101 min(-1)), which was even higher than that for pure TiO2, was obtained for the Ag/TiO2 sample. The highest quantum yield of the charge collection was determined for the undoped TiO2 film. (C) 2010 Elsevier Inc. All rights reserved.
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