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Effects of Thermal Annealing on Formation of Micro Porous Titanium Oxide by the Sol–Gel Method
Author(s) -
Koyama Hiroshi,
Fujimoto Masayuki,
Ohno Tomoya,
Suzuki Hisao,
Tanaka Junzo
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.1551-2916.2006.01235.x
Subject(s) - materials science , rutile , anatase , sol gel , titanium oxide , porosity , annealing (glass) , chemical engineering , microporous material , porous glass , titanium , colloidal crystal , polystyrene , mineralogy , nanotechnology , colloid , composite material , photocatalysis , polymer , metallurgy , chemistry , biochemistry , engineering , catalysis
We investigated the structural and optical properties of microporous titanium oxide (TiO 2 ) fabricated by the sol–gel method using templates of colloidal crystals with polystyrene spheres when the annealing temperature was changed between 600° and 1000°C. From X‐ray diffraction patterns and SEM images, the rutile TiO 2 annealed at a high temperature did not form periodic porous bodies, while the anatase TiO 2 annealed at lower than 800°C formed periodic porous bodies. The porous TiO 2 obtained acts as an air‐sphere/TiO 2 photonic crystal with an FCC structure. It is suggested that TiO 2 sol annealed at a lower temperature do not lead to phase transition from the anatase phase to the rutile phase to obtain the air‐sphere/TiO 2 photonic crystal by the sol–gel method using templates of colloidal crystals.