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A closer look at the synthesis and formation mechanism of hematite nanocubes

Malik, Vikash; Grobety, Bernard; Trappe, Veronique; Dietsch, Herve and Schurtenberger, Peter LU (2014) In Colloids and Surfaces A: Physicochemical and Engineering Aspects 445. p.21-29
Abstract
We have synthesized hematite cube-shaped nanoparticles using different synthesis paths to examine the effect of the intermediate product akaganeite (beta-FeOOH) on the size and shape of the final hematite particles. Akaganeite spindles and hematite nanocubes are prepared using forced hydrolysis of iron chloride (FeCI3) salt. We use a combination of transmission electron microscopy (TEM), high resolution transmission electron microscopy (HR-TEM),selected area electron diffraction (SAED) and dynamic light scattering (DLS). Akaganeite particles are found to be spindles, with an average length that depends linearly on the FeCI3 concentration, while their aspect ratio is hardly affected by the same parameter. Adjusting the akaganeite... (More)
We have synthesized hematite cube-shaped nanoparticles using different synthesis paths to examine the effect of the intermediate product akaganeite (beta-FeOOH) on the size and shape of the final hematite particles. Akaganeite spindles and hematite nanocubes are prepared using forced hydrolysis of iron chloride (FeCI3) salt. We use a combination of transmission electron microscopy (TEM), high resolution transmission electron microscopy (HR-TEM),selected area electron diffraction (SAED) and dynamic light scattering (DLS). Akaganeite particles are found to be spindles, with an average length that depends linearly on the FeCI3 concentration, while their aspect ratio is hardly affected by the same parameter. Adjusting the akaganeite concentration from 0.01 M to 0.10 M equivalent of FeCI3 in the subsequent transformation to hematite leads to single crystal nanocubes with sizes ranging from 37 to 175 nm. The combination of akaganeite concentration and size is found to be the key parameter to control the size and crystallinity of the resulting hematite particles. Possible formation mechanisms of single and polycrystalline hematite nanocubes are discussed. (c) 2014 Elsevier B.V. All rights reserved. (Less)
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author
organization
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Contribution to journal
publication status
published
subject
keywords
Hematite nanocubes, Hydrolysis, Formation mechanism
in
Colloids and Surfaces A: Physicochemical and Engineering Aspects
volume
445
pages
21 - 29
publisher
Elsevier
external identifiers
  • wos:000332436200003
  • scopus:84893093987
ISSN
0927-7757
DOI
10.1016/j.colsurfa.2013.12.069
language
English
LU publication?
yes
id
571bb494-b138-41a5-8e4b-3f616180d3af (old id 4410975)
date added to LUP
2014-04-29 11:27:15
date last changed
2017-08-13 04:06:09
@article{571bb494-b138-41a5-8e4b-3f616180d3af,
  abstract     = {We have synthesized hematite cube-shaped nanoparticles using different synthesis paths to examine the effect of the intermediate product akaganeite (beta-FeOOH) on the size and shape of the final hematite particles. Akaganeite spindles and hematite nanocubes are prepared using forced hydrolysis of iron chloride (FeCI3) salt. We use a combination of transmission electron microscopy (TEM), high resolution transmission electron microscopy (HR-TEM),selected area electron diffraction (SAED) and dynamic light scattering (DLS). Akaganeite particles are found to be spindles, with an average length that depends linearly on the FeCI3 concentration, while their aspect ratio is hardly affected by the same parameter. Adjusting the akaganeite concentration from 0.01 M to 0.10 M equivalent of FeCI3 in the subsequent transformation to hematite leads to single crystal nanocubes with sizes ranging from 37 to 175 nm. The combination of akaganeite concentration and size is found to be the key parameter to control the size and crystallinity of the resulting hematite particles. Possible formation mechanisms of single and polycrystalline hematite nanocubes are discussed. (c) 2014 Elsevier B.V. All rights reserved.},
  author       = {Malik, Vikash and Grobety, Bernard and Trappe, Veronique and Dietsch, Herve and Schurtenberger, Peter},
  issn         = {0927-7757},
  keyword      = {Hematite nanocubes,Hydrolysis,Formation mechanism},
  language     = {eng},
  pages        = {21--29},
  publisher    = {Elsevier},
  series       = {Colloids and Surfaces A: Physicochemical and Engineering Aspects},
  title        = {A closer look at the synthesis and formation mechanism of hematite nanocubes},
  url          = {http://dx.doi.org/10.1016/j.colsurfa.2013.12.069},
  volume       = {445},
  year         = {2014},
}