Tailoring Upconversion and Morphology of Yb/Eu Doped Y2O3 Nanostructures by Acid Composition Mediation

Daniela Nunes, Ana Pimentel, Mariana Matias, Tomas Freire, A. Araujo, Filipe Silva, Patricia Gaspar, Silvia Garcia, Patricia A. Carvalho, Elvira Fortunato, Rodrigo Martins

Research output: Contribution to journalArticle

10 Downloads (Pure)

Abstract

The present study reports the production of upconverter nanostructures composed by a yttrium oxide host matrix co-doped with ytterbium and europium, i.e., Y2O3:Yb3+/Eu3+. These nanostructures were formed through the dissociation of yttrium, ytterbium and europium oxides using acetic, hydrochloric and nitric acids, followed by a fast hydrothermal method assisted by microwave irradiation and subsequent calcination process. Structural characterization has been carried out by X-ray diffraction (XRD), scanning transmission electron microscopy (STEM) and scanning electron microscopy (SEM) both coupled with energy dispersive X-ray spectroscopy (EDS). The acid used for dissociation of the primary oxides played a crucial role on the morphology of the nanostructures. The acetic-based nanostructures resulted in nanosheets in the micrometer range, with thickness of around 50 nm, while hydrochloric and nitric resulted in sphere-shaped nanostructures. The produced nanostructures revealed a homogeneous distribution of the doping elements. The thermal behaviour of the materials has been investigated with in situ X-Ray diffraction and differential scanning calorimetry (DSC) experiments. Moreover, the optical band gaps of all materials were determined from diffuse reflectance spectroscopy, and their photoluminescence behaviour has been accessed showing significant differences depending on the acid used, which can directly influence their upconversion performance.
Original languageEnglish
Article number234
JournalNanomaterials
Volume9
Issue number2
DOIs
Publication statusPublished - Feb 2019

Keywords

  • microwave synthesis
  • oxide dissociation
  • doping
  • rare earth ions
  • upconversion

Cite this

@article{e6c2ecc71ae9452db7f3e110b4b1adff,
title = "Tailoring Upconversion and Morphology of Yb/Eu Doped Y2O3 Nanostructures by Acid Composition Mediation",
abstract = "The present study reports the production of upconverter nanostructures composed by a yttrium oxide host matrix co-doped with ytterbium and europium, i.e., Y2O3:Yb3+/Eu3+. These nanostructures were formed through the dissociation of yttrium, ytterbium and europium oxides using acetic, hydrochloric and nitric acids, followed by a fast hydrothermal method assisted by microwave irradiation and subsequent calcination process. Structural characterization has been carried out by X-ray diffraction (XRD), scanning transmission electron microscopy (STEM) and scanning electron microscopy (SEM) both coupled with energy dispersive X-ray spectroscopy (EDS). The acid used for dissociation of the primary oxides played a crucial role on the morphology of the nanostructures. The acetic-based nanostructures resulted in nanosheets in the micrometer range, with thickness of around 50 nm, while hydrochloric and nitric resulted in sphere-shaped nanostructures. The produced nanostructures revealed a homogeneous distribution of the doping elements. The thermal behaviour of the materials has been investigated with in situ X-Ray diffraction and differential scanning calorimetry (DSC) experiments. Moreover, the optical band gaps of all materials were determined from diffuse reflectance spectroscopy, and their photoluminescence behaviour has been accessed showing significant differences depending on the acid used, which can directly influence their upconversion performance.",
keywords = "microwave synthesis, oxide dissociation, doping, rare earth ions, upconversion",
author = "Daniela Nunes and Ana Pimentel and Mariana Matias and Tomas Freire and A. Araujo and Filipe Silva and Patricia Gaspar and Silvia Garcia and Carvalho, {Patricia A.} and Elvira Fortunato and Rodrigo Martins",
note = "This work was supported by FEDER funds, through the COMPETE 2020 Program, and national funds, through the Fundacao para Ciencia e Tecnologia (FCT), under the projects POCI-01-0145-FEDER-007688 (Reference UID/CTM/50025). The authors also acknowledge funding from the European Commission through the projects 1D-NEON (H2020-NMP-2015, grant 685758-21D) and BET-EU (H2020-TWINN-2015, grant 692373. The work was also partially funded by the Nanomark collaborative project between INCM (Imprensa Nacional-Casa da Moeda) and CENIMAT/i3N. D. Nunes and A. Pimentel acknowledge funding from FCT through the grants SFRH/BPD/84215/2012 and SFRH/BPD/76992/2011, respectively. P.A. Carvalho acknowledges support from the Research Council of Norway through grants 275752 and 197405/F50.",
year = "2019",
month = "2",
doi = "10.3390/nano9020234",
language = "English",
volume = "9",
journal = "Nanomaterials",
issn = "2079-4991",
publisher = "MDPI AG",
number = "2",

}

Tailoring Upconversion and Morphology of Yb/Eu Doped Y2O3 Nanostructures by Acid Composition Mediation. / Nunes, Daniela; Pimentel, Ana; Matias, Mariana; Freire, Tomas; Araujo, A.; Silva, Filipe; Gaspar, Patricia; Garcia, Silvia; Carvalho, Patricia A.; Fortunato, Elvira; Martins, Rodrigo.

In: Nanomaterials, Vol. 9, No. 2, 234, 02.2019.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Tailoring Upconversion and Morphology of Yb/Eu Doped Y2O3 Nanostructures by Acid Composition Mediation

AU - Nunes, Daniela

AU - Pimentel, Ana

AU - Matias, Mariana

AU - Freire, Tomas

AU - Araujo, A.

AU - Silva, Filipe

AU - Gaspar, Patricia

AU - Garcia, Silvia

AU - Carvalho, Patricia A.

AU - Fortunato, Elvira

AU - Martins, Rodrigo

N1 - This work was supported by FEDER funds, through the COMPETE 2020 Program, and national funds, through the Fundacao para Ciencia e Tecnologia (FCT), under the projects POCI-01-0145-FEDER-007688 (Reference UID/CTM/50025). The authors also acknowledge funding from the European Commission through the projects 1D-NEON (H2020-NMP-2015, grant 685758-21D) and BET-EU (H2020-TWINN-2015, grant 692373. The work was also partially funded by the Nanomark collaborative project between INCM (Imprensa Nacional-Casa da Moeda) and CENIMAT/i3N. D. Nunes and A. Pimentel acknowledge funding from FCT through the grants SFRH/BPD/84215/2012 and SFRH/BPD/76992/2011, respectively. P.A. Carvalho acknowledges support from the Research Council of Norway through grants 275752 and 197405/F50.

PY - 2019/2

Y1 - 2019/2

N2 - The present study reports the production of upconverter nanostructures composed by a yttrium oxide host matrix co-doped with ytterbium and europium, i.e., Y2O3:Yb3+/Eu3+. These nanostructures were formed through the dissociation of yttrium, ytterbium and europium oxides using acetic, hydrochloric and nitric acids, followed by a fast hydrothermal method assisted by microwave irradiation and subsequent calcination process. Structural characterization has been carried out by X-ray diffraction (XRD), scanning transmission electron microscopy (STEM) and scanning electron microscopy (SEM) both coupled with energy dispersive X-ray spectroscopy (EDS). The acid used for dissociation of the primary oxides played a crucial role on the morphology of the nanostructures. The acetic-based nanostructures resulted in nanosheets in the micrometer range, with thickness of around 50 nm, while hydrochloric and nitric resulted in sphere-shaped nanostructures. The produced nanostructures revealed a homogeneous distribution of the doping elements. The thermal behaviour of the materials has been investigated with in situ X-Ray diffraction and differential scanning calorimetry (DSC) experiments. Moreover, the optical band gaps of all materials were determined from diffuse reflectance spectroscopy, and their photoluminescence behaviour has been accessed showing significant differences depending on the acid used, which can directly influence their upconversion performance.

AB - The present study reports the production of upconverter nanostructures composed by a yttrium oxide host matrix co-doped with ytterbium and europium, i.e., Y2O3:Yb3+/Eu3+. These nanostructures were formed through the dissociation of yttrium, ytterbium and europium oxides using acetic, hydrochloric and nitric acids, followed by a fast hydrothermal method assisted by microwave irradiation and subsequent calcination process. Structural characterization has been carried out by X-ray diffraction (XRD), scanning transmission electron microscopy (STEM) and scanning electron microscopy (SEM) both coupled with energy dispersive X-ray spectroscopy (EDS). The acid used for dissociation of the primary oxides played a crucial role on the morphology of the nanostructures. The acetic-based nanostructures resulted in nanosheets in the micrometer range, with thickness of around 50 nm, while hydrochloric and nitric resulted in sphere-shaped nanostructures. The produced nanostructures revealed a homogeneous distribution of the doping elements. The thermal behaviour of the materials has been investigated with in situ X-Ray diffraction and differential scanning calorimetry (DSC) experiments. Moreover, the optical band gaps of all materials were determined from diffuse reflectance spectroscopy, and their photoluminescence behaviour has been accessed showing significant differences depending on the acid used, which can directly influence their upconversion performance.

KW - microwave synthesis

KW - oxide dissociation

KW - doping

KW - rare earth ions

KW - upconversion

U2 - 10.3390/nano9020234

DO - 10.3390/nano9020234

M3 - Article

VL - 9

JO - Nanomaterials

JF - Nanomaterials

SN - 2079-4991

IS - 2

M1 - 234

ER -