Premium
Formation of TiO2(B) Nanocrystallites in Sol‐Gel‐Derived SiO2‐TiO2 Film
Author(s) -
Kogure Toshihiro,
Umezawa Taku,
Kotani Yoshinori,
Matsuda Atsunori,
Tatsumisago Masahiro,
Minami Tsutomu
Publication year - 1999
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.1151-2916.1999.tb02233.x
Subject(s) - anatase , amorphous solid , transmission electron microscopy , materials science , annealing (glass) , sol gel , chemical engineering , wafer , high resolution transmission electron microscopy , crystallography , nanotechnology , mineralogy , composite material , chemistry , photocatalysis , biochemistry , engineering , catalysis
TiO 2 (B), one of the polymorphs of TiO 2 , has been formed by annealing a sol‐gel‐derived SiO 2 ‐TiO 2 amorphous film on a silicon wafer at 900°C in air. Transmission electron microscopy (TEM) revealed that nanocrystallites with a size of 5‐10 nm were dispersed in the amorphous SiO 2 matrix in the film. The X‐ray diffraction pattern and lattice fringe spacing in high‐resolution TEM images corresponded to those of TiO 2 (B). These TiO 2 (B) nanocrystallites are probably stable with the presence of surrounding SiO 2 in the film at 900°C, because previous works reported that this phase should be converted to anatase at temperatures higher than 550‐700°C.