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Direct Formation of Mg–Al‐Layered Double‐Hydroxide Films on Glass Substrate by the Sol–Gel Method With Hot Water Treatment
Author(s) -
Yamaguchi Naoko,
Ando Daisuke,
Tadanaga Kiyoharu,
Tatsumisago Masahiro
Publication year - 2007
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.1551-2916.2007.01711.x
Subject(s) - hydrotalcite , amorphous solid , hydroxide , sodium hydroxide , materials science , sol gel , substrate (aquarium) , layered double hydroxides , chemical engineering , thin film , inorganic chemistry , nuclear chemistry , chemistry , catalysis , nanotechnology , crystallography , organic chemistry , oceanography , geology , engineering
Amorphous Al 2 O 3 –MgO thin films with an Mg/Al ratio of unity were prepared on glass substrates by the sol–gel method with a heat treatment at 300°C for 30 min. By immersing the films in water containing sodium hydroxide (pH 10–13) at 100°C, nano‐crystals of Mg–Al‐layered double hydroxide (LDH) with a hexagonal structure, which is called hydrotalcite and the most basic composition of LDH, were precipitated on the amorphous Al 2 O 3 –MgO films. The maximum amount of Mg–Al nanocrystals was obtained when the film was immersed in basic solution of pH 12.