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Facile Size‐Controllable Synthesis of Colorful Quasi‐Cubic α‐Fe 2 O 3 Materials from Nanoscale to Microscale and Their Properties Related to the Size Effect
Author(s) -
He Shuai,
Wang GuangSheng,
Wang JiaWei,
Wei YunZhao,
Wu Yun,
Guo Lin,
Cao MaoSheng
Publication year - 2013
Publication title -
chempluschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.801
H-Index - 61
ISSN - 2192-6506
DOI - 10.1002/cplu.201300136
Subject(s) - dispersity , materials science , microscale chemistry , nanomaterials , hydrothermal circulation , particle size , nanocrystal , nanoscopic scale , aqueous solution , nanotechnology , chemical engineering , dielectric , band gap , hydrothermal synthesis , nanoparticle , environmentally friendly , cubic crystal system , chemistry , crystallography , polymer chemistry , optoelectronics , ecology , mathematics education , mathematics , engineering , biology
A facile and environmentally friendly hydrothermal approach has been employed to synthesize size‐controllable quasi‐cubic α‐Fe 2 O 3 nanocrystals by using an aqueous solution of FeCl 3 without any alkaline materials and stabilizing agent. The as‐prepared products were carefully characterized and the growth mechanism is also discussed. This hydrothermal synthesis of such quasi‐cubic structures implies a simple and low‐cost route to prepare monodisperse nanomaterials on a large scale. The size‐controllable synthesis of α‐Fe 2 O 3 is the first achieved successfully from 80 nm to 2 μm with constant structures. The synthesized α‐Fe 2 O 3 materials have different optical properties and stabilities in water, which are caused by the change of their band‐gap energy and specific surface areas. Finally, the dielectric properties of synthesized α‐Fe 2 O 3 cubes were also investigated, and the differences caused by the particle sizes are discussed.