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Community of Madrid, Spain, Project GEOMATERIALES II (S2013/MIT-2914)

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Community of Madrid, Spain, Project GEOMATERIALES II (S2013/MIT-2914)

Authors

Publications

Atomic scale study of the dehydration/structural transformation in micro and nanostructured brucite (Mg(OH)2) particles: Influence of the hydrothermal synthesis conditions

Gómez-Villalba, Luz Stella; Sierra-Fernández, Aránzazu; Milošević, Olivera; Fort, R.; Rabanal, Maria Eugenia

(Elsevier, 2017)

TY  - JOUR
AU  - Gómez-Villalba, Luz Stella
AU  - Sierra-Fernández, Aránzazu
AU  - Milošević, Olivera
AU  - Fort, R.
AU  - Rabanal, Maria Eugenia
PY  - 2017
UR  - http://dais.sanu.ac.rs/123456789/15970
AB  - Micro and nanostructured brucite (Mg(OH2)) particles synthesized by hydrothermal method from solutions with high content of hydrazine (0.14 M) and nitrate (0.24 g) were compared with samples obtained from low hydrazine content (0.0002 M) and nitrate (0.12 g). The samples were heated at 180 °C for 4 h, 6 h and 12 h. XRD, TEM-HRTEM, SAED and image analysis techniques were used for the morphological and structural characterization. The effect of electron beam irradiation on the brucite dehydration was observed in atomic resolution images at 300 kV. Hexagonal crystals show differences in crystallinity, strains and kinetic of reaction. High hydrazine/nitrate samples have slightly larger crystals with better crystallinity, showing a strong preferential orientation. Rietveld refinements show how unit cell parameters are bigger in samples obtained with higher hydrazine/nitrate content, confirming also the preferential orientation along the 0 0 0 1 plane. Differences in the dehydration process show the rapid formation of a porous surface, the amorphised cortex or the presence of highly oriented strains in samples prepared from higher hydrazine/nitrate content. Conversely, crystals slightly smaller with randomly scattered defect surfaces showing the Mg(OH)2/MgO interphase in samples prepared with low hydrazine/nitrate content. Significant differences in the kinetic of reaction indicate how the dehydration process is faster in samples prepared with high hydrazine/nitrate content.
PB  - Elsevier
T2  - Advanced Powder Technology
T1  - Atomic scale study of the dehydration/structural transformation in micro and nanostructured brucite (Mg(OH)2) particles: Influence of the hydrothermal synthesis conditions
SP  - 61
EP  - 72
VL  - 28
IS  - 1
DO  - 10.1016/j.apt.2016.08.014
ER  - 
@article{
author = "Gómez-Villalba, Luz Stella and Sierra-Fernández, Aránzazu and Milošević, Olivera and Fort, R. and Rabanal, Maria Eugenia",
year = "2017",
url = "http://dais.sanu.ac.rs/123456789/15970",
abstract = "Micro and nanostructured brucite (Mg(OH2)) particles synthesized by hydrothermal method from solutions with high content of hydrazine (0.14 M) and nitrate (0.24 g) were compared with samples obtained from low hydrazine content (0.0002 M) and nitrate (0.12 g). The samples were heated at 180 °C for 4 h, 6 h and 12 h. XRD, TEM-HRTEM, SAED and image analysis techniques were used for the morphological and structural characterization. The effect of electron beam irradiation on the brucite dehydration was observed in atomic resolution images at 300 kV. Hexagonal crystals show differences in crystallinity, strains and kinetic of reaction. High hydrazine/nitrate samples have slightly larger crystals with better crystallinity, showing a strong preferential orientation. Rietveld refinements show how unit cell parameters are bigger in samples obtained with higher hydrazine/nitrate content, confirming also the preferential orientation along the 0 0 0 1 plane. Differences in the dehydration process show the rapid formation of a porous surface, the amorphised cortex or the presence of highly oriented strains in samples prepared from higher hydrazine/nitrate content. Conversely, crystals slightly smaller with randomly scattered defect surfaces showing the Mg(OH)2/MgO interphase in samples prepared with low hydrazine/nitrate content. Significant differences in the kinetic of reaction indicate how the dehydration process is faster in samples prepared with high hydrazine/nitrate content.",
publisher = "Elsevier",
journal = "Advanced Powder Technology",
title = "Atomic scale study of the dehydration/structural transformation in micro and nanostructured brucite (Mg(OH)2) particles: Influence of the hydrothermal synthesis conditions",
pages = "61-72",
volume = "28",
number = "1",
doi = "10.1016/j.apt.2016.08.014"
}
Gómez-Villalba, L. S., Sierra-Fernández, A., Milošević, O., Fort, R.,& Rabanal, M. E. (2017). Atomic scale study of the dehydration/structural transformation in micro and nanostructured brucite (Mg(OH)2) particles: Influence of the hydrothermal synthesis conditions.
Advanced Powder TechnologyElsevier., 28(1), 61-72. 
https://doi.org/10.1016/j.apt.2016.08.014
Gómez-Villalba LS, Sierra-Fernández A, Milošević O, Fort R, Rabanal ME. Atomic scale study of the dehydration/structural transformation in micro and nanostructured brucite (Mg(OH)2) particles: Influence of the hydrothermal synthesis conditions. Advanced Powder Technology. 2017;28(1):61-72
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The processing of optically active functional hierarchical nanoparticles

Mančić, Lidija; Nikolić, M.; Gómez, Luz Stella; Rabanal, Maria Eugenia; Milošević, Olivera

(Elsevier, 2017)

TY  - JOUR
AU  - Mančić, Lidija
AU  - Nikolić, M.
AU  - Gómez, Luz Stella
AU  - Rabanal, Maria Eugenia
AU  - Milošević, Olivera
PY  - 2017
UR  - http://dais.sanu.ac.rs/123456789/2344
AB  - Global climate changes and the aroused environmentally-energy problems categorically moved the research efforts towards programmed processing of a novel class of hierarchical materials having well defined phase, compositional and morphological features. The synthesis based on the principles of the molecular design and integrative chemistry which includes the innovative aerosol and hydro(solvo)thermal nanotechnology routes, the building block assembling and hybridization, represent intelligent platform for the creation of advanced functional materials. Due to exceptional optical properties and a diverse application in electronics, optoelectronics, energy conversion/storage and biomedicine, the examples from some wide band gap oxides for light harvesting and photocatalytic applications as well as both down and up-conversion energy-saving luminescent materials for photonic and biological applications are considered. With the help of various analyzing techniques like XRPD (X-ray powder diffraction), field emission scanning electron microscopy (FE-SEM), energy dispersive spectroscopy (EDS), analytical and high resolution transmission electron microscopy (TEM, HR-TEM), selected area electron diffraction (SAED), scanning tunneling electron microscopy (STEM), Fourier transform infrared (FTIR) and Raman spectroscopy, photocatalytic and fluorescence measurements, the opportunities of the aerosol and hydro(solvo)thermal routes for the synthesis of novel hierarchically and hybrid assembled structures and nanocomposites are reviewed highlighting the recent research activities realized in the Institute of Technical Sciences of SASA, Belgrade, Serbia and University Carlos III, Madrid, Spain. The morphological, structural and functional aspects of the following systems: ZnO, TiO2, Y2O3:Eu,Yb/Er/T/Hm, Y2O3:Eu@Ag, (Y1−xGdx)2O3:Eu, (NaYF4:Yb/Er)@EDTA/PEG/PVP, are discussed from the state-of-the art and literature contexts. Controlled growth of 1D and 3D hierarchical structures based on the single-source processing methodology in combination with the homogeneous precipitation of optically active intermediate precursor are especially stressed for the case of yttria based phosphor particles and phase-dependent luminescence efficiency. The obtained results offer possible routes for the synthesis of hierarchically structured nanomaterials with tunable structure, morphology and optical properties.
PB  - Elsevier
T2  - Advanced Powder Technology
T1  - The processing of optically active functional hierarchical nanoparticles
SP  - 3
EP  - 22
VL  - 28
IS  - 1
DO  - 10.1016/j.apt.2016.09.018
ER  - 
@article{
author = "Mančić, Lidija and Nikolić, M. and Gómez, Luz Stella and Rabanal, Maria Eugenia and Milošević, Olivera",
year = "2017",
url = "http://dais.sanu.ac.rs/123456789/2344",
abstract = "Global climate changes and the aroused environmentally-energy problems categorically moved the research efforts towards programmed processing of a novel class of hierarchical materials having well defined phase, compositional and morphological features. The synthesis based on the principles of the molecular design and integrative chemistry which includes the innovative aerosol and hydro(solvo)thermal nanotechnology routes, the building block assembling and hybridization, represent intelligent platform for the creation of advanced functional materials. Due to exceptional optical properties and a diverse application in electronics, optoelectronics, energy conversion/storage and biomedicine, the examples from some wide band gap oxides for light harvesting and photocatalytic applications as well as both down and up-conversion energy-saving luminescent materials for photonic and biological applications are considered. With the help of various analyzing techniques like XRPD (X-ray powder diffraction), field emission scanning electron microscopy (FE-SEM), energy dispersive spectroscopy (EDS), analytical and high resolution transmission electron microscopy (TEM, HR-TEM), selected area electron diffraction (SAED), scanning tunneling electron microscopy (STEM), Fourier transform infrared (FTIR) and Raman spectroscopy, photocatalytic and fluorescence measurements, the opportunities of the aerosol and hydro(solvo)thermal routes for the synthesis of novel hierarchically and hybrid assembled structures and nanocomposites are reviewed highlighting the recent research activities realized in the Institute of Technical Sciences of SASA, Belgrade, Serbia and University Carlos III, Madrid, Spain. The morphological, structural and functional aspects of the following systems: ZnO, TiO2, Y2O3:Eu,Yb/Er/T/Hm, Y2O3:Eu@Ag, (Y1−xGdx)2O3:Eu, (NaYF4:Yb/Er)@EDTA/PEG/PVP, are discussed from the state-of-the art and literature contexts. Controlled growth of 1D and 3D hierarchical structures based on the single-source processing methodology in combination with the homogeneous precipitation of optically active intermediate precursor are especially stressed for the case of yttria based phosphor particles and phase-dependent luminescence efficiency. The obtained results offer possible routes for the synthesis of hierarchically structured nanomaterials with tunable structure, morphology and optical properties.",
publisher = "Elsevier",
journal = "Advanced Powder Technology",
title = "The processing of optically active functional hierarchical nanoparticles",
pages = "3-22",
volume = "28",
number = "1",
doi = "10.1016/j.apt.2016.09.018"
}
Mančić, L., Nikolić, M., Gómez, L. S., Rabanal, M. E.,& Milošević, O. (2017). The processing of optically active functional hierarchical nanoparticles.
Advanced Powder TechnologyElsevier., 28(1), 3-22. 
https://doi.org/10.1016/j.apt.2016.09.018
Mančić L, Nikolić M, Gómez LS, Rabanal ME, Milošević O. The processing of optically active functional hierarchical nanoparticles. Advanced Powder Technology. 2017;28(1):3-22
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