http://www.cnr.it/ontology/cnr/individuo/prodotto/ID215419
Surface Decoration of MgO Nanocubes with Sulfur Oxides: Experiment and Theory (Articolo in rivista)
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- Surface Decoration of MgO Nanocubes with Sulfur Oxides: Experiment and Theory (Articolo in rivista) (literal)
- Anno
- 2013-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1021/jp401432j (literal)
- Alternative label
Sternig A.; Diwald O.; Gross S.; Sushko P.V. (2013)
Surface Decoration of MgO Nanocubes with Sulfur Oxides: Experiment and Theory
in Journal of physical chemistry. C. (Online); ACS, American chemical society, Washington, DC (Stati Uniti d'America)
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- Sternig A.; Diwald O.; Gross S.; Sushko P.V. (literal)
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- http://pubs.acs.org/doi/abs/10.1021/jp401432j (literal)
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- 1,2 : Institute of Particle Technology, Friedrich-Alexander University Erlangen-Nürnberg, Cauerstraße 4, 91058 Erlangen, Germany /
3 : Istituto di Scienze e Tecnologie Molecolari, ISTM-CNR, INSTM, via Marzolo, 1, I-35131, Padova, Italy /
4 : University College London, Department of Physics and Astronomy, London WC1E 6BT, United Kingdom (literal)
- Titolo
- Surface Decoration of MgO Nanocubes with Sulfur Oxides: Experiment and Theory (literal)
- Abstract
- We investigated the effect of surface sulfate formation on the structure and
spectroscopic properties of MgO nanocubes using X-ray diffraction, electron microscopy,
several spectroscopic techniques, and ab initio calculations. After CS2 adsorption and oxidative
treatment at elevated temperatures the MgO particles remain cubic and retain their average
size of ~6 nm. Their low coordinated surface elements (corners and edges) were found to
bind sulfite and sulfate groups even after annealing up to 1173 K. The absence of MgO corner
specific photoluminescence emission bands at 3.4 and 3.2 eV substantiates that sulfur modifies
the electronic properties of characteristic surface structures, which we attribute to the
formation of (SO3)2- and (SO4)2- groups at corners and edges. Ab initio calculations support
these conclusions and provide insight into the local atomic structures and spectroscopic
properties of these groups. (literal)
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