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Synthesis of Mesoporous Thin TiO 2 Films with Hexagonal Pore Structures Using Triblock Copolymer Templates
Author(s) -
Yun H.S.,
Miyazawa K.,
Zhou H. S.,
Honma I.,
Kuwabara M.
Publication year - 2001
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/1521-4095(200109)13:18<1377::aid-adma1377>3.0.co;2-t
Subject(s) - materials science , copolymer , template , mesoporous material , calcination , anatase , thin film , hexagonal crystal system , chemical engineering , annealing (glass) , superstructure , nanotechnology , sol gel , polymer , crystallography , composite material , photocatalysis , organic chemistry , catalysis , chemistry , engineering , oceanography , geology
TiO 2 thin films with a hexagonal mesoporous structure and an anatase‐type crystalline framework are easily synthesized by a sol–gel method at low pH, using an EO–PO–EO block copolymer as template. While the TiO 2 /polymer superstructure originally has a primitive cubic structure, annealing at 150 °C affords a phase transition to hexagonal (see Figure), which persists upon template removal by calcination.