Reference : Well Shaped Mn(3)O(4) Nano-octahedra with Anomalous Magnetic Behavior and Enhanced Ph...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Chemistry
Well Shaped Mn(3)O(4) Nano-octahedra with Anomalous Magnetic Behavior and Enhanced Photodecomposition Properties
Li, Yu [Wuhan University of Technology and University of Namur > > > >]
Tan, Haiyan [University of Antwerp > > EMAT > >]
Yang, Xiao-Yu [Wuhan University of Technology and University of Namur > > > >]
Goris, Bart [University of Antwerp > > EMAT > >]
Verbeeck, Jo [University of Antwerp > > EMAT > >]
Bals, Sara [University of Antwerp > > EMAT > >]
Colson, Pierre mailto [Université de Liège - ULiège > Département de chimie (sciences) > LCIS - GreenMAT]
Cloots, Rudi [> > > >]
Van Tendeloo, Gustaaf [University of Antwerp > > EMAT > >]
Su, Bao-Lian [Wuhan University of Technology and University of Namur > > > >]
Small : Nano Micro
Yes (verified by ORBi)
[en] Very uniform and well shaped Mn(3)O(4) nano-octahedra are synthesized using a simple hydrothermal method under the help of polyethylene glycol (PEG200) as a reductant and shape-directing agent. The nano-octahedra formation mechanism is monitored. The shape and crystal orientation of the nanoparticles is reconstructed by scanning electron microscopy and electron tomography, which reveals that the nano-octahedra only selectively expose {101} facets at the external surfaces. The magnetic testing demonstrates that the Mn(3)O(4) nano-octahedra exhibit anomalous magnetic properties: the Mn(3)O(4) nano-octahedra around 150 nm show a similar Curie temperature and blocking temperature to Mn(3)O(4) nanoparticles with 10 nm size because of the vertical axis of [001] plane and the exposed {101} facets. With these Mn(3)O(4) nano-octahedra as a catalyst, the photodecomposition of rhodamine B is evaluated and it is found that the photodecomposition activity of Mn(3)O(4) nano-octahedra is much superior to that of commercial Mn(3)O(4) powders. The anomalous magnetic properties and high superior photodecomposition activity of well shaped Mn(3)O(4) nano-octahedra should be related to the special shape of the nanoparticles and the abundantly exposed {101} facets at the external surfaces. Therefore, the shape preference can largely broaden the application of the Mn(3)O(4) nano-octahedra.
Politique Scientifique Fédérale (Belgique) = Belgian Federal Science Policy ; Intereg IV ; Union Européenne = European Union - UE = EU
Researchers ; Professionals

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