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Synthesis of spindle‐shaped α‐FeOOH and α‐Fe 2 O 3 nanocrystals
Author(s) -
Liang Jun,
Luo Min,
Yang Caihong,
Fang Junzhuo,
Li Li
Publication year - 2011
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.201100066
Subject(s) - hydrothermal circulation , nanocrystal , transmission electron microscopy , calcination , scanning electron microscope , nanostructure , chemical engineering , materials science , hydrothermal synthesis , nanotechnology , crystallography , chemistry , catalysis , composite material , organic chemistry , engineering
Spindle‐shaped α‐FeOOH nanocrystals were facilely synthesized using a poly (vinyl pyrrolidone) (PVP)‐assisted route under hydrothermal conditions. The chemical compositions and morphol‐ogies of the as‐prepared samples were characterized in detail by X‐ray power diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscope (TEM). The experimental results reveal that these spindle‐shaped α‐FeOOH nanocrystals have self‐organized into assemblies with hierarchical nanostructures. The crucial roles of PVP in the hydrothermal synthesis of hierarchical α‐FeOOH nanostructures were discussed. The possible formation mechanism was also suggested. Moreover, the spindle‐shaped α‐Fe 2 O 3 nanocrystals could be easily obtained after calcining the α‐FeOOH prepared by the PVP‐assisted hydrothermal process. (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)