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@ARTICLE{Fominykh:834705,
author = {Fominykh, Ksenia and Boehm, Daniel and Zhang, Siyuan and
Folger, Alena and Döblinger, Markus and Bein, Thomas and
Scheu, Christina and Fattakhova-Rohlfing, Dina},
title = {{N}on-agglomerated iron oxyhydroxide akaganeite
nanocrystals incorporating extraordinary high amounts of
different dopants},
journal = {Chemistry of materials},
volume = {29},
number = {17},
issn = {1520-5002},
address = {Washington, DC},
publisher = {American Chemical Society},
reportid = {FZJ-2017-04608},
pages = {7223-7233},
year = {2017},
abstract = {Dispersible nonagglomerated akaganeite (β-FeOOH)
nanocrystals doped with various elements in different
oxidation states such as Co(II), Ni(II), V(III), Ti(IV),
Sn(IV), Si(IV), and Nb(V) were prepared using a
microwave-assisted solvothermal synthesis in tert-butanol.
The doping elements could be incorporated in very high
concentrations of up to 20 $at. \%,$ which is attributed
to the kinetic control of the phase formation during the
solvothermal reaction, together with the extremely small
crystal size, which can stabilize the unusual structural
compositions. The particle morphology is mostly anisotropic
consisting of nanorods ∼4 nm in width and varying length.
Depending on the doping element, the length ranges from ∼4
nm, resulting in an almost-spherical shape, to 90 nm, giving
the highest aspect ratio. The particles are perfectly
dispersible in water, giving stable colloidal dispersions
that can be deposited on different substrates to produce
thin films 35–250 nm thick. In addition, films up to 30
μm thick, consisting of interconnected mesoporous spheres,
can be prepared in situ during the reactions. The
nanostructures assembled from akaganeite nanocrystals are
stable up to high temperatures of >400 °C. They can be
transformed to hematite (α-Fe2O3) by heating between 480
°C and 600 °C without losing the morphology, which can be
used for the fabrication of doped hematite nanostructures.
The tunable properties of the doped akaganeite nanoparticles
make them excellent candidates for a wide range of
applications, as well as versatile building blocks for the
fabrication of doped hematite nanomorphologies.},
cin = {IEK-1},
ddc = {540},
cid = {I:(DE-Juel1)IEK-1-20101013},
pnm = {131 - Electrochemical Storage (POF3-131)},
pid = {G:(DE-HGF)POF3-131},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000410868600024},
doi = {10.1021/acs.chemmater.7b01611},
url = {https://juser.fz-juelich.de/record/834705},
}