Preparation and Properties of Octadecahedral α‐Fe 2 O 3  Nanoparticles Enclosed by {104} and {112} Facets | Zendy

Liu Zhong | Zendy; Lv Baoliang | Zendy; Wu Dong | Zendy; Sun Yuhan | Zendy; Xu Yao | Zendy

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Preparation and Properties of Octadecahedral α‐Fe 2 O 3 Nanoparticles Enclosed by {104} and {112} Facets

Author(s) -

Liu Zhong,

Lv Baoliang,

Wu Dong,

Sun Yuhan,

Xu Yao

Publication year - 2012

Publication title -

european journal of inorganic chemistry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.667

H-Index - 136

eISSN - 1099-0682

pISSN - 1434-1948

DOI - 10.1002/ejic.201200140

Subject(s) - chemistry , formamide , nanoparticle , polyvinylpyrrolidone , coercivity , steric effects , adsorption , crystallography , nanotechnology , chemical engineering , stereochemistry , organic chemistry , condensed matter physics , materials science , physics , engineering

Octadecahedral α‐Fe 2 O 3 nanoparticles were hydrothermally synthesized in the presence of formamide. These octadecahedral α‐Fe 2 O 3 nanoparticles have a threefold axis and are enclosed by twelve dominant {112} facets and six {104} facets. In comparison with the {104} facets, the sterically less hindered {112} facets induced the selective adsorption of formamide more easily, which resulted in the gradual increase in the amount of {112} facets by decreasing the amount of {104} facets with increasing formamide. The coercivity ( H c ) of these octadecahedral particles increased successively as the aspect ratio ( c / a ) increased. The sensing capability of these particles toward H 2 O 2 was investigated, and the response currents of the particles dominated by {112} facets showed a linear relationship with a concentration of H 2 O 2 in the range from 40 μ M to 6.66 m M in different stages.

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