Premium
Preparation of Mesoporous Titania Thin Films with Well‐Crystallized Frameworks by Using Thermally Stable Triblock Copolymers
Author(s) -
Zakaria Mohamed B.,
Suzuki Norihiro,
Torad Nagy L.,
Matsuura Mikiya,
Maekawa Kazuhiko,
Tanabe Hirofumi,
Yamauchi Yusuke
Publication year - 2013
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201201305
Subject(s) - mesoporous material , calcination , copolymer , chemical engineering , polystyrene , anatase , polybutadiene , materials science , thin film , scanning electron microscope , spin coating , polymer , polymer chemistry , chemistry , nanotechnology , organic chemistry , composite material , photocatalysis , catalysis , engineering
Mesoporous titania (TiO 2 ) thin films are prepared by a spin‐coating method using new laboratory‐made polystyrene‐ block ‐polybutadiene‐ block ‐polystyrene‐based triblock copolymers in which the polystyrene block is functionalized with hydrophilic sulfonic groups (abbreviated as sulfonated HmSEBmS). The polymer used in this study is more thermally stable than commercial Pluronic‐type block copolymers (e.g. P123 and F127). As‐prepared TiO 2 thin films are calcined under various temperatures. The calcined films are systematically characterized by low‐angle and wide‐angle XRD, scanning electron microscopy (SEM), and nitrogen gas adsorption–desorption isotherms. As calcination temperatures increase, crystal growth proceeds in the pore walls and the phase transformation from anatase to rutile occurs. Even after calcination at 550 and 600 °C, the thin films nicely preserve high surface areas. On the other hand, the surface areas of mesoporous TiO 2 prepared from P123 are markedly decreased after calcination at 550 °C.