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G.D. of Universities and Research, Madrid Regional Government, Spain, Advanced Structural Materials Program - ESTRUMAT (S2009/MAT-1585)

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G.D. of Universities and Research, Madrid Regional Government, Spain, Advanced Structural Materials Program - ESTRUMAT (S2009/MAT-1585)

Authors

Publications

Synthesis and morpho-structural characterization of nanostructured magnesium hydroxide obtained by a hydrothermal method

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

(Elsevier, 2014)

TY  - JOUR
AU  - Sierra-Fernández, Aránzazu
AU  - Gómez Villalba, Luz Stella
AU  - Milošević, Olivera
AU  - Fort, R.
AU  - Rabanal, Maria Eugenia
PY  - 2014
UR  - http://hdl.handle.net/10016/26936
UR  - http://dais.sanu.ac.rs/123456789/4729
AB  - Controlled magnesium hydroxide particles were successfully synthesized via a simple hydrothermal method. The influence of temperature and reaction time on the hydrothermal synthesis of Mg(OH)(2) was studied. The results provide new parameters to control the morphologies, particle sizes, agglomeration level and crystallographic structures of the brucite nanosized. The physic chemical properties of synthesized Mg(OH)(2) nanoparticles have been characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) combined with selected area electron diffraction (SAED), high resolution transmission electron microscopy (HR-TEM) and thermogravimetry/differential scanning calorimetry (TG/DSC). It has been shown that the prolongation of reaction time improves the crystalline degree of magnesium hydroxide particles. It was also possible to detect a relevant increase in the degree of crystallinity and a faster crystal growth with defined hexagonal morphologies in the samples obtained at higher temperature. Our results show that this simple hydrothermal route is highly interesting for the large scale production of these nanomaterials. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
PB  - Elsevier
T2  - Ceramics International
T1  - Synthesis and morpho-structural characterization of nanostructured magnesium hydroxide obtained by a hydrothermal method
SP  - 12285
EP  - 12292
VL  - 40
IS  - 8, Part A
DO  - 10.1016/j.ceramint.2014.04.073
ER  - 
@article{
author = "Sierra-Fernández, Aránzazu and Gómez Villalba, Luz Stella and Milošević, Olivera and Fort, R. and Rabanal, Maria Eugenia",
year = "2014",
url = "http://hdl.handle.net/10016/26936, http://dais.sanu.ac.rs/123456789/4729",
abstract = "Controlled magnesium hydroxide particles were successfully synthesized via a simple hydrothermal method. The influence of temperature and reaction time on the hydrothermal synthesis of Mg(OH)(2) was studied. The results provide new parameters to control the morphologies, particle sizes, agglomeration level and crystallographic structures of the brucite nanosized. The physic chemical properties of synthesized Mg(OH)(2) nanoparticles have been characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) combined with selected area electron diffraction (SAED), high resolution transmission electron microscopy (HR-TEM) and thermogravimetry/differential scanning calorimetry (TG/DSC). It has been shown that the prolongation of reaction time improves the crystalline degree of magnesium hydroxide particles. It was also possible to detect a relevant increase in the degree of crystallinity and a faster crystal growth with defined hexagonal morphologies in the samples obtained at higher temperature. Our results show that this simple hydrothermal route is highly interesting for the large scale production of these nanomaterials. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.",
publisher = "Elsevier",
journal = "Ceramics International",
title = "Synthesis and morpho-structural characterization of nanostructured magnesium hydroxide obtained by a hydrothermal method",
pages = "12285-12292",
volume = "40",
number = "8, Part A",
doi = "10.1016/j.ceramint.2014.04.073"
}
Sierra-Fernández, A., Gómez Villalba, L. S., Milošević, O., Fort, R.,& Rabanal, M. E. (2014). Synthesis and morpho-structural characterization of nanostructured magnesium hydroxide obtained by a hydrothermal method.
Ceramics InternationalElsevier., 40(8, Part A), 12285-12292.
https://doi.org/10.1016/j.ceramint.2014.04.073
Sierra-Fernández A, Gómez Villalba LS, Milošević O, Fort R, Rabanal ME. Synthesis and morpho-structural characterization of nanostructured magnesium hydroxide obtained by a hydrothermal method. Ceramics International. 2014;40(8, Part A):12285-12292
Sierra-Fernández Aránzazu, Gómez Villalba Luz Stella, Milošević Olivera, Fort R., Rabanal Maria Eugenia, "Synthesis and morpho-structural characterization of nanostructured magnesium hydroxide obtained by a hydrothermal method" 40, no. 8, Part A (2014):12285-12292,
https://doi.org/10.1016/j.ceramint.2014.04.073 .
23
26
31

Synthesis, characterization and photocatalytic properties of nanostructured ZnO particles obtained by low temperature air-assisted-USP

Flores-Carrasco, Gregorio; Carrillo, J.; Luna, J. A.; Martínez, R.; Sierra-Fernández, Aránzazu; Milošević, Olivera; Rabanal, Maria Eugenia

(Elsevier, 2014)

TY  - JOUR
AU  - Flores-Carrasco, Gregorio
AU  - Carrillo, J.
AU  - Luna, J. A.
AU  - Martínez, R.
AU  - Sierra-Fernández, Aránzazu
AU  - Milošević, Olivera
AU  - Rabanal, Maria Eugenia
PY  - 2014
UR  - http://dais.sanu.ac.rs/123456789/651
AB  - ZnO nanoparticles were synthesized in a horizontal three zones furnace at 500 °C using different zinc nitrate hexahydrate concentrations (0.01 M, 0.1 M, and 1.0 M) as a reactive precursor solution by air assisted Ultrasonic Spray Pyrolysis (USP) method. The physico-chemical, structural and functional properties of synthesized ZnO nanoparticles have been characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), high resolution transmission electron microscopy (HRTEM), Brunauer, Emmett and Teller (BET) method, UV–vis spectroscopy and photoluminescence (PL) measurements. Also, the photocatalytic activities of ZnO synthesized from different precursor concentrations were evaluated by removal rate of methyleneblue (MB) under UV irradiation (365 nm) at room temperature. SEM revealed two types of ZnO nanoparticles: a quasi-spherical, desert-rose like shape of the secondary particles, which does not change significantly with the increasing of precursor solution concentration as well as some content of the broken spheres. Increasing the precursor solution concentration leads to the increase in the average size of ZnO secondary particles from 248 ± 73 to 920 ± 190 nm, XRD reveals the similar tendency for the crystallite size which changes from 23 ± 4 to 55 ± 12 nm in the analyzed region. HRTEM implies the secondary particles are with hierarchical structure composed of primary nanosized subunits. The PL spectra imply a typical broad peak of wavelength centered in the visible region exhibiting the corresponding red-shift with the increase of solution concentration: 560, 583 and 586 nm for the 0.01, 0.1 and 1.0 M solution, respectively. The reported results showed the photocatalytic efficiency of ZnO nanoparticles was enhanced by increased precursor concentration.
PB  - Elsevier
T2  - Advanced Powder Technology
T1  - Synthesis, characterization and photocatalytic properties of nanostructured ZnO particles obtained by low temperature air-assisted-USP
SP  - 1435
EP  - 1441
VL  - 25
IS  - 5
DO  - 10.1016/j.apt.2014.02.004
ER  - 
@article{
author = "Flores-Carrasco, Gregorio and Carrillo, J. and Luna, J. A. and Martínez, R. and Sierra-Fernández, Aránzazu and Milošević, Olivera and Rabanal, Maria Eugenia",
year = "2014",
url = "http://dais.sanu.ac.rs/123456789/651",
abstract = "ZnO nanoparticles were synthesized in a horizontal three zones furnace at 500 °C using different zinc nitrate hexahydrate concentrations (0.01 M, 0.1 M, and 1.0 M) as a reactive precursor solution by air assisted Ultrasonic Spray Pyrolysis (USP) method. The physico-chemical, structural and functional properties of synthesized ZnO nanoparticles have been characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), high resolution transmission electron microscopy (HRTEM), Brunauer, Emmett and Teller (BET) method, UV–vis spectroscopy and photoluminescence (PL) measurements. Also, the photocatalytic activities of ZnO synthesized from different precursor concentrations were evaluated by removal rate of methyleneblue (MB) under UV irradiation (365 nm) at room temperature. SEM revealed two types of ZnO nanoparticles: a quasi-spherical, desert-rose like shape of the secondary particles, which does not change significantly with the increasing of precursor solution concentration as well as some content of the broken spheres. Increasing the precursor solution concentration leads to the increase in the average size of ZnO secondary particles from 248 ± 73 to 920 ± 190 nm, XRD reveals the similar tendency for the crystallite size which changes from 23 ± 4 to 55 ± 12 nm in the analyzed region. HRTEM implies the secondary particles are with hierarchical structure composed of primary nanosized subunits. The PL spectra imply a typical broad peak of wavelength centered in the visible region exhibiting the corresponding red-shift with the increase of solution concentration: 560, 583 and 586 nm for the 0.01, 0.1 and 1.0 M solution, respectively. The reported results showed the photocatalytic efficiency of ZnO nanoparticles was enhanced by increased precursor concentration.",
publisher = "Elsevier",
journal = "Advanced Powder Technology",
title = "Synthesis, characterization and photocatalytic properties of nanostructured ZnO particles obtained by low temperature air-assisted-USP",
pages = "1435-1441",
volume = "25",
number = "5",
doi = "10.1016/j.apt.2014.02.004"
}
Flores-Carrasco, G., Carrillo, J., Luna, J. A., Martínez, R., Sierra-Fernández, A., Milošević, O.,& Rabanal, M. E. (2014). Synthesis, characterization and photocatalytic properties of nanostructured ZnO particles obtained by low temperature air-assisted-USP.
Advanced Powder TechnologyElsevier., 25(5), 1435-1441.
https://doi.org/10.1016/j.apt.2014.02.004
Flores-Carrasco G, Carrillo J, Luna JA, Martínez R, Sierra-Fernández A, Milošević O, Rabanal ME. Synthesis, characterization and photocatalytic properties of nanostructured ZnO particles obtained by low temperature air-assisted-USP. Advanced Powder Technology. 2014;25(5):1435-1441
Flores-Carrasco Gregorio, Carrillo J., Luna J. A., Martínez R., Sierra-Fernández Aránzazu, Milošević Olivera, Rabanal Maria Eugenia, "Synthesis, characterization and photocatalytic properties of nanostructured ZnO particles obtained by low temperature air-assisted-USP" 25, no. 5 (2014):1435-1441,
https://doi.org/10.1016/j.apt.2014.02.004 .
19
13
18

Synthesis and morpho-structural characterization of nanostructured magnesium hydroxide obtained by a hydrothermal method

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

(Elsevier, 2014)

TY  - JOUR
AU  - Sierra-Fernández, Aránzazu
AU  - Gómez-Villalba, Luz Stella
AU  - Milošević, Olivera
AU  - Fort, R.
AU  - Rabanal, Maria Eugenia
PY  - 2014
UR  - http://dais.sanu.ac.rs/123456789/566
AB  - Controlled magnesium hydroxide particles were successfully synthesized via a simple hydrothermal method. The influence of temperature and reaction time on the hydrothermal synthesis of Mg(OH)2 was studied. The results provide new parameters to control the morphologies, particle sizes, agglomeration level and crystallographic structures of the brucite nanosized. The physic–chemical properties of synthesized Mg(OH)2 nanoparticles have been characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) combined with selected area electron diffraction (SAED), high resolution transmission electron microscopy (HR-TEM) and thermogravimetry/ differential scanning calorimetry (TG/DSC). It has been shown that the prolongation of reaction time improves the crystalline degree of magnesium hydroxide particles. It was also possible to detect a relevant increase in the degree of crystallinity and a faster crystal growth with defined hexagonal morphologies in the samples obtained at higher temperature. Our results show that this simple hydrothermal route is highly interesting for the large scale production of these nanomaterials.
PB  - Elsevier
T2  - Ceramics International
T1  - Synthesis and morpho-structural characterization of nanostructured magnesium hydroxide obtained by a hydrothermal method
SP  - 12285
EP  - 12292
VL  - 40
IS  - 8, Part A
DO  - 10.1016/j.ceramint.2014.04.073
ER  - 
@article{
author = "Sierra-Fernández, Aránzazu and Gómez-Villalba, Luz Stella and Milošević, Olivera and Fort, R. and Rabanal, Maria Eugenia",
year = "2014",
url = "http://dais.sanu.ac.rs/123456789/566",
abstract = "Controlled magnesium hydroxide particles were successfully synthesized via a simple hydrothermal method. The influence of temperature and reaction time on the hydrothermal synthesis of Mg(OH)2 was studied. The results provide new parameters to control the morphologies, particle sizes, agglomeration level and crystallographic structures of the brucite nanosized. The physic–chemical properties of synthesized Mg(OH)2 nanoparticles have been characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) combined with selected area electron diffraction (SAED), high resolution transmission electron microscopy (HR-TEM) and thermogravimetry/ differential scanning calorimetry (TG/DSC). It has been shown that the prolongation of reaction time improves the crystalline degree of magnesium hydroxide particles. It was also possible to detect a relevant increase in the degree of crystallinity and a faster crystal growth with defined hexagonal morphologies in the samples obtained at higher temperature. Our results show that this simple hydrothermal route is highly interesting for the large scale production of these nanomaterials.",
publisher = "Elsevier",
journal = "Ceramics International",
title = "Synthesis and morpho-structural characterization of nanostructured magnesium hydroxide obtained by a hydrothermal method",
pages = "12285-12292",
volume = "40",
number = "8, Part A",
doi = "10.1016/j.ceramint.2014.04.073"
}
Sierra-Fernández, A., Gómez-Villalba, L. S., Milošević, O., Fort, R.,& Rabanal, M. E. (2014). Synthesis and morpho-structural characterization of nanostructured magnesium hydroxide obtained by a hydrothermal method.
Ceramics InternationalElsevier., 40(8, Part A), 12285-12292.
https://doi.org/10.1016/j.ceramint.2014.04.073
Sierra-Fernández A, Gómez-Villalba LS, Milošević O, Fort R, Rabanal ME. Synthesis and morpho-structural characterization of nanostructured magnesium hydroxide obtained by a hydrothermal method. Ceramics International. 2014;40(8, Part A):12285-12292
Sierra-Fernández Aránzazu, Gómez-Villalba Luz Stella, Milošević Olivera, Fort R., Rabanal Maria Eugenia, "Synthesis and morpho-structural characterization of nanostructured magnesium hydroxide obtained by a hydrothermal method" 40, no. 8, Part A (2014):12285-12292,
https://doi.org/10.1016/j.ceramint.2014.04.073 .
23
26
31

Directed growth of nanoarchitected hybrid phosphor particles synthesized at low temperature

Rabanal, Maria Eugenia; Barroso, Ignacio; Gómez-Villalba, Luz Stella; Mančić, Lidija; Milošević, Olivera

(Elsevier, 2014)

TY  - JOUR
AU  - Rabanal, Maria Eugenia
AU  - Barroso, Ignacio
AU  - Gómez-Villalba, Luz Stella
AU  - Mančić, Lidija
AU  - Milošević, Olivera
PY  - 2014
UR  - http://dais.sanu.ac.rs/123456789/661
AB  - Sub-micronic particles are of considerable interest for a wide variety of applications, such as catalyst or optical ceramics, due to their unique properties determined by size, composition and structure. In this work, we have reported a simple, rapid, single-step aerosol processing for the continuous synthesis of nanostructured particles having homogeneous composition and narrow size distributions, good crystallinity and fluorescence response. This paper presents the synthesis, optimization and characterization of hybrid Ag@Y2O3:Eu (9 at.% Eu3+) phosphor particles by means of spray pyrolysis method from water solutions of common nitrates precursors. The effect of silver concentration on particle structure, morphology and functional properties was specially evaluated. The as-prepared samples were additionally heated from 800 to 1200 °C/12 h under constant argon flow to avoid the silver oxidation. It was evident the cubic phase with Ia-3 symmetry as the principal one in all as-prepared and thermally treated samples. For the case high silver nitrate concentrations in precursor solutions a minority crystalline phase having Fm3m symmetry was identified. The luminescence emission spectra have been taken after excitation at 235 nm wavelength. It is evident the increase in the emission caused by the presence of metallic silver nanoparticles onto Y2O3:Eu3+ particle surface. It was also determined the silver concentration influence on the fluorescence response.
PB  - Elsevier
T2  - Advanced Powder Technology
T1  - Directed growth of nanoarchitected hybrid phosphor particles synthesized at low temperature
SP  - 1442
EP  - 1448
VL  - 25
IS  - 5
DO  - 10.1016/j.apt.2014.03.006
ER  - 
@article{
author = "Rabanal, Maria Eugenia and Barroso, Ignacio and Gómez-Villalba, Luz Stella and Mančić, Lidija and Milošević, Olivera",
year = "2014",
url = "http://dais.sanu.ac.rs/123456789/661",
abstract = "Sub-micronic particles are of considerable interest for a wide variety of applications, such as catalyst or optical ceramics, due to their unique properties determined by size, composition and structure. In this work, we have reported a simple, rapid, single-step aerosol processing for the continuous synthesis of nanostructured particles having homogeneous composition and narrow size distributions, good crystallinity and fluorescence response. This paper presents the synthesis, optimization and characterization of hybrid Ag@Y2O3:Eu (9 at.% Eu3+) phosphor particles by means of spray pyrolysis method from water solutions of common nitrates precursors. The effect of silver concentration on particle structure, morphology and functional properties was specially evaluated. The as-prepared samples were additionally heated from 800 to 1200 °C/12 h under constant argon flow to avoid the silver oxidation. It was evident the cubic phase with Ia-3 symmetry as the principal one in all as-prepared and thermally treated samples. For the case high silver nitrate concentrations in precursor solutions a minority crystalline phase having Fm3m symmetry was identified. The luminescence emission spectra have been taken after excitation at 235 nm wavelength. It is evident the increase in the emission caused by the presence of metallic silver nanoparticles onto Y2O3:Eu3+ particle surface. It was also determined the silver concentration influence on the fluorescence response.",
publisher = "Elsevier",
journal = "Advanced Powder Technology",
title = "Directed growth of nanoarchitected hybrid phosphor particles synthesized at low temperature",
pages = "1442-1448",
volume = "25",
number = "5",
doi = "10.1016/j.apt.2014.03.006"
}
Rabanal, M. E., Barroso, I., Gómez-Villalba, L. S., Mančić, L.,& Milošević, O. (2014). Directed growth of nanoarchitected hybrid phosphor particles synthesized at low temperature.
Advanced Powder TechnologyElsevier., 25(5), 1442-1448.
https://doi.org/10.1016/j.apt.2014.03.006
Rabanal ME, Barroso I, Gómez-Villalba LS, Mančić L, Milošević O. Directed growth of nanoarchitected hybrid phosphor particles synthesized at low temperature. Advanced Powder Technology. 2014;25(5):1442-1448
Rabanal Maria Eugenia, Barroso Ignacio, Gómez-Villalba Luz Stella, Mančić Lidija, Milošević Olivera, "Directed growth of nanoarchitected hybrid phosphor particles synthesized at low temperature" 25, no. 5 (2014):1442-1448,
https://doi.org/10.1016/j.apt.2014.03.006 .
3
3
3

TEM-STEM study of europium doped gadolinium oxide nanoparticles synthesized by spray pyrolysis

Gómez-Villalba, Luz Stella; Sourty, E.; Freitag, B.; Milošević, Olivera; Rabanal, Maria Eugenia

(Elsevier, 2013)

TY  - JOUR
AU  - Gómez-Villalba, Luz Stella
AU  - Sourty, E.
AU  - Freitag, B.
AU  - Milošević, Olivera
AU  - Rabanal, Maria Eugenia
PY  - 2013
UR  - http://dais.sanu.ac.rs/123456789/15981
AB  - Scanning-Transmission and Transmission Electron Microscopy techniques (STEM and TEM) have been applied to the characterization of nanostructured gadolinium oxides doped with europium synthesized by spray pyrolysis. The High Angle Annular Dark Field (HAADF) – Scanning Transmission Electron Microscopy (STEM) tools have been used to perform a tomographic study to identify morphological characteristics of nanostructured particles, and to differentiate them according to the heat treatments to which these have been subjected. With these techniques it has been possible to confirm the hollowness and porous nature of samples subjected to low temperature annealing (900 °C). Moreover, the beginning of the densification and sintering processes in samples subjected to thermal treatment at higher temperature (1100 °C) have been evaluated. Chemical analysis by electron energy loss spectroscopy (EELS) and X ray energy dispersive spectroscopy (EDS) carried out in STEM mode have allowed to confirm the high uniformity and the expected chemical composition. The high resolution tools either allowed to confirm the presence of a cubic (Ia3 symmetry) and the monoclinic (c2/m symmetry) phases in the nanostructured particles.
PB  - Elsevier
T2  - Advanced Powder Technology
T1  - TEM-STEM study of europium doped gadolinium oxide nanoparticles synthesized by spray pyrolysis
SP  - 864
EP  - 870
VL  - 24
IS  - 5
DO  - 10.1016/j.apt.2013.03.011
ER  - 
@article{
author = "Gómez-Villalba, Luz Stella and Sourty, E. and Freitag, B. and Milošević, Olivera and Rabanal, Maria Eugenia",
year = "2013",
url = "http://dais.sanu.ac.rs/123456789/15981",
abstract = "Scanning-Transmission and Transmission Electron Microscopy techniques (STEM and TEM) have been applied to the characterization of nanostructured gadolinium oxides doped with europium synthesized by spray pyrolysis. The High Angle Annular Dark Field (HAADF) – Scanning Transmission Electron Microscopy (STEM) tools have been used to perform a tomographic study to identify morphological characteristics of nanostructured particles, and to differentiate them according to the heat treatments to which these have been subjected. With these techniques it has been possible to confirm the hollowness and porous nature of samples subjected to low temperature annealing (900 °C). Moreover, the beginning of the densification and sintering processes in samples subjected to thermal treatment at higher temperature (1100 °C) have been evaluated. Chemical analysis by electron energy loss spectroscopy (EELS) and X ray energy dispersive spectroscopy (EDS) carried out in STEM mode have allowed to confirm the high uniformity and the expected chemical composition. The high resolution tools either allowed to confirm the presence of a cubic (Ia3 symmetry) and the monoclinic (c2/m symmetry) phases in the nanostructured particles.",
publisher = "Elsevier",
journal = "Advanced Powder Technology",
title = "TEM-STEM study of europium doped gadolinium oxide nanoparticles synthesized by spray pyrolysis",
pages = "864-870",
volume = "24",
number = "5",
doi = "10.1016/j.apt.2013.03.011"
}
Gómez-Villalba, L. S., Sourty, E., Freitag, B., Milošević, O.,& Rabanal, M. E. (2013). TEM-STEM study of europium doped gadolinium oxide nanoparticles synthesized by spray pyrolysis.
Advanced Powder TechnologyElsevier., 24(5), 864-870.
https://doi.org/10.1016/j.apt.2013.03.011
Gómez-Villalba LS, Sourty E, Freitag B, Milošević O, Rabanal ME. TEM-STEM study of europium doped gadolinium oxide nanoparticles synthesized by spray pyrolysis. Advanced Powder Technology. 2013;24(5):864-870
Gómez-Villalba Luz Stella, Sourty E., Freitag B., Milošević Olivera, Rabanal Maria Eugenia, "TEM-STEM study of europium doped gadolinium oxide nanoparticles synthesized by spray pyrolysis" 24, no. 5 (2013):864-870,
https://doi.org/10.1016/j.apt.2013.03.011 .
2
2
2

TEM-STEM study of europium doped gadolinium oxide nanoparticles synthesized by spray pyrolysis

Gómez, Luz Stella; Sourty, E.; Freitag, B.; Milošević, Olivera; Rabanal, Maria Eugenia

(Elsevier, 2013)

TY  - JOUR
AU  - Gómez, Luz Stella
AU  - Sourty, E.
AU  - Freitag, B.
AU  - Milošević, Olivera
AU  - Rabanal, Maria Eugenia
PY  - 2013
UR  - http://dais.sanu.ac.rs/123456789/351
AB  - Scanning-Transmission and Transmission Electron Microscopy techniques (STEM and TEM) have been applied to the characterization of nanostructured gadolinium oxides doped with europium synthesized by spray pyrolysis. The High Angle Annular Dark Field (HAADF) – Scanning Transmission Electron Microscopy (STEM) tools have been used to perform a tomographic study to identify morphological characteristics of nanostructured particles, and to differentiate them according to the heat treatments to which these have been subjected. With these techniques it has been possible to confirm the hollowness and porous nature of samples subjected to low temperature annealing (900 °C). Moreover, the beginning of the densification and sintering processes in samples subjected to thermal treatment at higher temperature (1100 °C) have been evaluated. Chemical analysis by electron energy loss spectroscopy (EELS) and X ray energy dispersive spectroscopy (EDS) carried out in STEM mode have allowed to confirm the high uniformity and the expected chemical composition. The high resolution tools either allowed to confirm the presence of a cubic (Ia3 symmetry) and the monoclinic (c2/m symmetry) phases in the nanostructured particles.
PB  - Elsevier
T2  - Advanced Powder Technology
T1  - TEM-STEM study of europium doped gadolinium oxide nanoparticles synthesized by spray pyrolysis
SP  - 864
EP  - 870
VL  - 24
IS  - 5
DO  - 10.1016/j.apt.2013.03.011
ER  - 
@article{
author = "Gómez, Luz Stella and Sourty, E. and Freitag, B. and Milošević, Olivera and Rabanal, Maria Eugenia",
year = "2013",
url = "http://dais.sanu.ac.rs/123456789/351",
abstract = "Scanning-Transmission and Transmission Electron Microscopy techniques (STEM and TEM) have been applied to the characterization of nanostructured gadolinium oxides doped with europium synthesized by spray pyrolysis. The High Angle Annular Dark Field (HAADF) – Scanning Transmission Electron Microscopy (STEM) tools have been used to perform a tomographic study to identify morphological characteristics of nanostructured particles, and to differentiate them according to the heat treatments to which these have been subjected. With these techniques it has been possible to confirm the hollowness and porous nature of samples subjected to low temperature annealing (900 °C). Moreover, the beginning of the densification and sintering processes in samples subjected to thermal treatment at higher temperature (1100 °C) have been evaluated. Chemical analysis by electron energy loss spectroscopy (EELS) and X ray energy dispersive spectroscopy (EDS) carried out in STEM mode have allowed to confirm the high uniformity and the expected chemical composition. The high resolution tools either allowed to confirm the presence of a cubic (Ia3 symmetry) and the monoclinic (c2/m symmetry) phases in the nanostructured particles.",
publisher = "Elsevier",
journal = "Advanced Powder Technology",
title = "TEM-STEM study of europium doped gadolinium oxide nanoparticles synthesized by spray pyrolysis",
pages = "864-870",
volume = "24",
number = "5",
doi = "10.1016/j.apt.2013.03.011"
}
Gómez, L. S., Sourty, E., Freitag, B., Milošević, O.,& Rabanal, M. E. (2013). TEM-STEM study of europium doped gadolinium oxide nanoparticles synthesized by spray pyrolysis.
Advanced Powder TechnologyElsevier., 24(5), 864-870.
https://doi.org/10.1016/j.apt.2013.03.011
Gómez LS, Sourty E, Freitag B, Milošević O, Rabanal ME. TEM-STEM study of europium doped gadolinium oxide nanoparticles synthesized by spray pyrolysis. Advanced Powder Technology. 2013;24(5):864-870
Gómez Luz Stella, Sourty E., Freitag B., Milošević Olivera, Rabanal Maria Eugenia, "TEM-STEM study of europium doped gadolinium oxide nanoparticles synthesized by spray pyrolysis" 24, no. 5 (2013):864-870,
https://doi.org/10.1016/j.apt.2013.03.011 .
2
2
2

Evaluación de las propiedades luminiscentes y detección de Eu2+ en partículas nanoestructuradas del sistema Gd2-xEuxO3 (x= 0.05, 0.10 y 0.30)

Barroso, Ignacio; Mena, I.; Gómez, Luz Stella; Milošević, Olivera; Rabanal, Maria Eugenia

(Madrid : Sociedad Espanola de Ceramica y Vidrio, 2012)

TY  - JOUR
AU  - Barroso, Ignacio
AU  - Mena, I.
AU  - Gómez, Luz Stella
AU  - Milošević, Olivera
AU  - Rabanal, Maria Eugenia
PY  - 2012
UR  - http://dais.sanu.ac.rs/123456789/460
AB  - Mediante el método de Spray Pirólisis (SP) operando a 700ºC y en atmósfera de aire seco, se obtuvieron partículas nanoestructuradas de composición Gd2-xEuxO3 (χ= 0.05, 0.10 y 0.30) partiendo de las respectivas disoluciones acuosas de nitratos (0.1M). En el presente trabajo, se estudiaron tres muestras con distinta concentración de europio correspondiente al 1, 2 y 6% atómico. Posteriormente, las partículas nanoestructuradas obtenidas se sometieron a distintos tratamientos térmicos comprendidos entre 800 y 1000ºC/12h en atmósfera de aire.
Las partículas obtenidas se caracterizaron mediante técnicas de DRX, SEM, dispersión láser y medidas de fluorescencia en estado estacionario.
Se ha podido identificar la existencia de dos fases cristalinas cúbicas con distinta simetría (Ia-3 y Fm-3m) en las muestras “as-prepared”. Además, se ha demostrado la presencia de una fase de Gd2O3 monoclínica (C2/m), la cual desaparece con los tratamientos térmicos posteriores. En todas las muestras tratadas térmicamente se observa la estabilización de la fase cúbica más estable con simetría Ia-3.
Mediante medidas de emisión de fluorescencia se ha podido detectar en todas las muestras estudiadas la presencia de Eu2+ (λ=430nm), independientemente del porcentaje de Eu3+.
AB  - Spray Pyrolysis (SP) is performed at 700°C in dry air atmosphere using common nitrate aqueous solutions (0,1M) as precursor in order to obtain nanostructured particles with the composition Gd2-xEuxO3 (x= 0.05, 0.10 and 0.30). In this work, three samples with different atomic europium concentration (1, 2 and 6%) were studied. After, the obtained particles were subjected to different thermal treatments with varying temperatures between 800 and 1000oC/12 h in dry air atmosphere. The obtained particles were characterized by XRD, SEM techniques, laser dispersion and steady state fluorescence spectroscopy. The existence of two cubic phases with different symmetry cubic phases (Ia-3, Fm-3m) was identified within the "as-prepared" samples. Moreover, the presence of Gd2O3 monoclinic phase (C2/m) which disappears during the thermal treatments was proved. In all thermally treated samples, it was observed the stabilization of an only Ia-3 phase. Fluorescence emission measurements in all studied samples the presence of Eu2+ (λ= 430nm), whose intensity increases as long as the content of the monoclinic phase decreases of the Eu3+ percentage.
PB  - Madrid : Sociedad Espanola de Ceramica y Vidrio
T2  - Boletín de la Sociedad Espanola de Cerámica y Vidrio
T1  - Evaluación de las propiedades luminiscentes y detección de Eu2+ en partículas nanoestructuradas del sistema Gd2-xEuxO3 (x= 0.05, 0.10 y 0.30)
SP  - 255
EP  - 260
DO  - 10.3989/cyv.362012
ER  - 
@article{
author = "Barroso, Ignacio and Mena, I. and Gómez, Luz Stella and Milošević, Olivera and Rabanal, Maria Eugenia",
year = "2012",
url = "http://dais.sanu.ac.rs/123456789/460",
abstract = "Mediante el método de Spray Pirólisis (SP) operando a 700ºC y en atmósfera de aire seco, se obtuvieron partículas nanoestructuradas de composición Gd2-xEuxO3 (χ= 0.05, 0.10 y 0.30) partiendo de las respectivas disoluciones acuosas de nitratos (0.1M). En el presente trabajo, se estudiaron tres muestras con distinta concentración de europio correspondiente al 1, 2 y 6% atómico. Posteriormente, las partículas nanoestructuradas obtenidas se sometieron a distintos tratamientos térmicos comprendidos entre 800 y 1000ºC/12h en atmósfera de aire.
Las partículas obtenidas se caracterizaron mediante técnicas de DRX, SEM, dispersión láser y medidas de fluorescencia en estado estacionario.
Se ha podido identificar la existencia de dos fases cristalinas cúbicas con distinta simetría (Ia-3 y Fm-3m) en las muestras “as-prepared”. Además, se ha demostrado la presencia de una fase de Gd2O3 monoclínica (C2/m), la cual desaparece con los tratamientos térmicos posteriores. En todas las muestras tratadas térmicamente se observa la estabilización de la fase cúbica más estable con simetría Ia-3.
Mediante medidas de emisión de fluorescencia se ha podido detectar en todas las muestras estudiadas la presencia de Eu2+ (λ=430nm), independientemente del porcentaje de Eu3+., Spray Pyrolysis (SP) is performed at 700°C in dry air atmosphere using common nitrate aqueous solutions (0,1M) as precursor in order to obtain nanostructured particles with the composition Gd2-xEuxO3 (x= 0.05, 0.10 and 0.30). In this work, three samples with different atomic europium concentration (1, 2 and 6%) were studied. After, the obtained particles were subjected to different thermal treatments with varying temperatures between 800 and 1000oC/12 h in dry air atmosphere. The obtained particles were characterized by XRD, SEM techniques, laser dispersion and steady state fluorescence spectroscopy. The existence of two cubic phases with different symmetry cubic phases (Ia-3, Fm-3m) was identified within the "as-prepared" samples. Moreover, the presence of Gd2O3 monoclinic phase (C2/m) which disappears during the thermal treatments was proved. In all thermally treated samples, it was observed the stabilization of an only Ia-3 phase. Fluorescence emission measurements in all studied samples the presence of Eu2+ (λ= 430nm), whose intensity increases as long as the content of the monoclinic phase decreases of the Eu3+ percentage.",
publisher = "Madrid : Sociedad Espanola de Ceramica y Vidrio",
journal = "Boletín de la Sociedad Espanola de Cerámica y Vidrio",
title = "Evaluación de las propiedades luminiscentes y detección de Eu2+ en partículas nanoestructuradas del sistema Gd2-xEuxO3 (x= 0.05, 0.10 y 0.30)",
pages = "255-260",
doi = "10.3989/cyv.362012"
}
Barroso, I., Mena, I., Gómez, L. S., Milošević, O.,& Rabanal, M. E. (2012). Evaluación de las propiedades luminiscentes y detección de Eu2+ en partículas nanoestructuradas del sistema Gd2-xEuxO3 (x= 0.05, 0.10 y 0.30).
Boletín de la Sociedad Espanola de Cerámica y VidrioMadrid : Sociedad Espanola de Ceramica y Vidrio., 255-260.
https://doi.org/10.3989/cyv.362012
Barroso I, Mena I, Gómez LS, Milošević O, Rabanal ME. Evaluación de las propiedades luminiscentes y detección de Eu2+ en partículas nanoestructuradas del sistema Gd2-xEuxO3 (x= 0.05, 0.10 y 0.30). Boletín de la Sociedad Espanola de Cerámica y Vidrio. 2012;:255-260
Barroso Ignacio, Mena I., Gómez Luz Stella, Milošević Olivera, Rabanal Maria Eugenia, "Evaluación de las propiedades luminiscentes y detección de Eu2+ en partículas nanoestructuradas del sistema Gd2-xEuxO3 (x= 0.05, 0.10 y 0.30)" (2012):255-260,
https://doi.org/10.3989/cyv.362012 .
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