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Photocatalytic activity of apatite-deposited titanium dioxide powde
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Date
2010
Author
Soysal, Kaan
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Apatite was formed on the surface of titanium dioxide (TiO2) powders by a biomimetic process. The deposition was accomplished by immersing TiO2 powders in simulated body fluid (SBF) for 1, 3, 6, 12, and 24 h. SBF used throughout this study had calcium and phosphate ion concentrations 10 times greater than those of human blood plasma. Photocatalytic activity of the apatite-deposited TiO2 powders was investigated in terms of the decomposition of methylene blue solution under ultraviolet (UV) irradiation. It has been shown that apatite deposition enhanced the photocatalytic activity of TiO2. The best photocatalytic performance was acquired on the powders that are immersed in SBF for 3 h. The time required for the complete degradation of methylene blue decreased from 3.5 h to 2 h upon immersion of powders in SBF for 3 h. Photochemical durability of poly(methyl methacrylate) increased when it was mixed with apatite-deposited TiO2 powders.
Subject Keywords
Metallurgical and materials engineering.
,
Hydroxyapatite.
,
Simulated body fluid.
,
Chemical technology.
URI
http://etd.lib.metu.edu.tr/upload/12611820/index.pdf
https://hdl.handle.net/11511/19703
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Graduate School of Natural and Applied Sciences, Thesis
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K. Soysal, “Photocatalytic activity of apatite-deposited titanium dioxide powde,” M.S. - Master of Science, Middle East Technical University, 2010.
