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Electrochemical Properties of Hydroxyapatite Crystal Surfaces on Anatase Photocatalysts
Author(s) -
Funakoshi Kunio,
ami Toru
Publication year - 2006
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2005.00802.x
Subject(s) - anatase , photocatalysis , materials science , chemical engineering , titanium dioxide , titanium , methylene blue , oxidizing agent , electrochemistry , nanotechnology , chemistry , composite material , metallurgy , catalysis , organic chemistry , electrode , engineering
Hydroxyapatite (HAp) was crystallized on anatase titanium dioxide (TiO 2 ) photocatalytic crystals or their thin films using of a pseudo‐body solution method, and electrochemical properties of the HAp‐adhered anatase TiO 2 photocatalytic surfaces were discussed. Decomposition rates of methylene blue were faster for the HAp‐adhered anatase TiO 2 photocatalysts, although specific surface areas were smaller than those for the commercial anatase TiO 2 ones. Surface potential dispersions on the HAp‐adhered anatase TiO 2 thin films before and after an ultraviolet light irradiation were measured by an atomic force microscopy. Changes in the color of leucocrystalviolet mixed in the HAp‐adhered anatase TiO 2 photocatalysts or the commercial anatase TiO 2 ones with experimental durations were compared. Movements of electrons from the anatase TiO 2 photocatalytic surfaces to the HAp, crystals and oxidizing reactions on the HAp‐adhered anatase TiO 2 photocatalytic surfaces in the dark were discussed on the basis of these experimental results.