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Topochemical Synthesis of Monometallic (Co 2+ –Co 3+ ) Layered Double Hydroxide and Its Exfoliation into Positively Charged Co(OH) 2 Nanosheets
Author(s) -
Ma Renzhi,
Takada Kazunori,
Fukuda Katsutoshi,
Iyi Nobuo,
Bando Yoshio,
Sasaki Takayoshi
Publication year - 2007
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200703941
Subject(s) - exfoliation joint , hydroxide , bromine , acetonitrile , chemistry , inorganic chemistry , nuclear chemistry , crystallography , materials science , organic chemistry , nanotechnology , graphene
From platelets to sheets : A topochemical phase conversion employing bromine in acetonitrile transforms β‐Co(OH) 2 into monometallic Co 2+ –Co 3+ layered double hydroxide (LDH) with a Co 2+ /Co 3+ ratio of 2:1 (see the elemental maps of Co, Br, and O in a Br − ‐intercalated Co 2+ –Co 3+ LDH platelet). Further treatment allows exfoliation of Co 2+ –Co 3+ LDH into positively charged Co(OH) 2 nanosheets. Scale bars: 2 μm.