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Synthesis, characterization and photocatalytic properties of LaNiO3-based powders

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2019
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Authors
Vukašinović, Jelena
Počuča-Nešić, Milica
Dapčević, Aleksandra
Ribić, Vesna
Branković, Goran
Branković, Zorica
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Abstract
Lanthanum nickelate (LaNiO3, LNO) belongs to the group of materials with perovskite-type structure and it crystallizes in rhombohedrally distorted perovskite lattice. This material exhibits interesting electrical, magnetic, optical and catalytic properties and it is suitable for various applications. Still, the preparation of single phase LNO is difficult, because at temperatures above 850 °C it decomposes into the lower oxides with formula Lan+1NinO3n+1 (n = 3, 2, 1) and NiO. In this work we present the synthesis of pure and Nb doped LNO powders, LaNi1-xNbxO3 (x = 0.000, 0.005, 0.010) prepared from mechanochemically activated oxide precursors – La2O3, NiO and Nb2O5. For this experiment, precursor powders homogenized in isopropyl alcohol were dried and mechanochemically activated in the planetary ball mill for 3 h. As-prepared powders were calcined at 700 °C for 3 h in air and further analyzed by X-ray diffraction analysis (XRD), Transmission electron microscopy (TEM), Scan...ning electron microscopy (SEM) and UV-Vis spectroscopy. Photocatalytic activity in visible light was investigated. The XRD analysis of undoped LNO revealed the existence of rhombohedral LaNiO3 and small amount of NiO phase. The doped samples, apart from LNO, contained products of thermal decomposition – layered oxides and NiO. TEM and HRTEM analyses of undoped LNO revealed the presence of agglomerated particles with single particle size being in the range of 20–40 nm. Doping with Nb led to decrease of agglomeration process and allowed better dispersion between particles of LNO based powders. Calculated band gaps were 1.12 eV, 0.89 eV and 0.87 eV for x = 0.00, 0.005, 0.010. The absorption spectra indicated photocatalytic degradation of Reactive Orange 16, textile dye used as a model in these experiments.

Keywords:
LaNiO3 / Mechanochemical synthesis / X-ray diffraction analysis / Photocatalytic degradation / Reactive Orange 16
Source:
5th Conference of the Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade, Serbia, 2019, 72-
Publisher:
  • University of Belgrade, Institute for Multidisciplinary Research
Funding / projects:
  • Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 200053 (University of Belgrade, Institute for Multidisciplinary Research) (RS-200053)

ISBN: 978-86-80109-22-0

[ Google Scholar ]
Handle
https://hdl.handle.net/21.15107/rcub_rimsi_2030
URI
http://rimsi.imsi.bg.ac.rs/handle/123456789/2030
Collections
  • Radovi istraživača / Researchers’ publications
Institution/Community
Institut za multidisciplinarna istraživanja
TY  - CONF
AU  - Vukašinović, Jelena
AU  - Počuča-Nešić, Milica
AU  - Dapčević, Aleksandra
AU  - Ribić, Vesna
AU  - Branković, Goran
AU  - Branković, Zorica
PY  - 2019
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2030
AB  - Lanthanum nickelate (LaNiO3, LNO) belongs to the group of materials with
perovskite-type structure and it crystallizes in rhombohedrally distorted perovskite
lattice. This material exhibits interesting electrical, magnetic, optical and catalytic
properties and it is suitable for various applications. Still, the preparation of single
phase LNO is difficult, because at temperatures above 850 °C it decomposes into the
lower oxides with formula Lan+1NinO3n+1 (n = 3, 2, 1) and NiO.
In this work we present the synthesis of pure and Nb doped LNO powders,
LaNi1-xNbxO3 (x = 0.000, 0.005, 0.010) prepared from mechanochemically activated
oxide precursors – La2O3, NiO and Nb2O5. For this experiment, precursor powders
homogenized in isopropyl alcohol were dried and mechanochemically activated in
the planetary ball mill for 3 h. As-prepared powders were calcined at 700 °C for 3 h
in air and further analyzed by X-ray diffraction analysis (XRD), Transmission
electron microscopy (TEM), Scanning electron microscopy (SEM) and UV-Vis
spectroscopy. Photocatalytic activity in visible light was investigated.
The XRD analysis of undoped LNO revealed the existence of rhombohedral
LaNiO3 and small amount of NiO phase. The doped samples, apart from LNO,
contained products of thermal decomposition – layered oxides and NiO. TEM and
HRTEM analyses of undoped LNO revealed the presence of agglomerated particles
with single particle size being in the range of 20–40 nm. Doping with Nb led to
decrease of agglomeration process and allowed better dispersion between particles
of LNO based powders. Calculated band gaps were 1.12 eV, 0.89 eV and 0.87 eV
for x = 0.00, 0.005, 0.010. The absorption spectra indicated photocatalytic
degradation of Reactive Orange 16, textile dye used as a model in these
experiments.
PB  - University of Belgrade, Institute for Multidisciplinary Research
C3  - 5th Conference of the Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade, Serbia
T1  - Synthesis, characterization and photocatalytic properties of LaNiO3-based powders
SP  - 72
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2030
ER  - 
@conference{
author = "Vukašinović, Jelena and Počuča-Nešić, Milica and Dapčević, Aleksandra and Ribić, Vesna and Branković, Goran and Branković, Zorica",
year = "2019",
abstract = "Lanthanum nickelate (LaNiO3, LNO) belongs to the group of materials with
perovskite-type structure and it crystallizes in rhombohedrally distorted perovskite
lattice. This material exhibits interesting electrical, magnetic, optical and catalytic
properties and it is suitable for various applications. Still, the preparation of single
phase LNO is difficult, because at temperatures above 850 °C it decomposes into the
lower oxides with formula Lan+1NinO3n+1 (n = 3, 2, 1) and NiO.
In this work we present the synthesis of pure and Nb doped LNO powders,
LaNi1-xNbxO3 (x = 0.000, 0.005, 0.010) prepared from mechanochemically activated
oxide precursors – La2O3, NiO and Nb2O5. For this experiment, precursor powders
homogenized in isopropyl alcohol were dried and mechanochemically activated in
the planetary ball mill for 3 h. As-prepared powders were calcined at 700 °C for 3 h
in air and further analyzed by X-ray diffraction analysis (XRD), Transmission
electron microscopy (TEM), Scanning electron microscopy (SEM) and UV-Vis
spectroscopy. Photocatalytic activity in visible light was investigated.
The XRD analysis of undoped LNO revealed the existence of rhombohedral
LaNiO3 and small amount of NiO phase. The doped samples, apart from LNO,
contained products of thermal decomposition – layered oxides and NiO. TEM and
HRTEM analyses of undoped LNO revealed the presence of agglomerated particles
with single particle size being in the range of 20–40 nm. Doping with Nb led to
decrease of agglomeration process and allowed better dispersion between particles
of LNO based powders. Calculated band gaps were 1.12 eV, 0.89 eV and 0.87 eV
for x = 0.00, 0.005, 0.010. The absorption spectra indicated photocatalytic
degradation of Reactive Orange 16, textile dye used as a model in these
experiments.",
publisher = "University of Belgrade, Institute for Multidisciplinary Research",
journal = "5th Conference of the Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade, Serbia",
title = "Synthesis, characterization and photocatalytic properties of LaNiO3-based powders",
pages = "72",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2030"
}
Vukašinović, J., Počuča-Nešić, M., Dapčević, A., Ribić, V., Branković, G.,& Branković, Z.. (2019). Synthesis, characterization and photocatalytic properties of LaNiO3-based powders. in 5th Conference of the Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade, Serbia
University of Belgrade, Institute for Multidisciplinary Research., 72.
https://hdl.handle.net/21.15107/rcub_rimsi_2030
Vukašinović J, Počuča-Nešić M, Dapčević A, Ribić V, Branković G, Branković Z. Synthesis, characterization and photocatalytic properties of LaNiO3-based powders. in 5th Conference of the Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade, Serbia. 2019;:72.
https://hdl.handle.net/21.15107/rcub_rimsi_2030 .
Vukašinović, Jelena, Počuča-Nešić, Milica, Dapčević, Aleksandra, Ribić, Vesna, Branković, Goran, Branković, Zorica, "Synthesis, characterization and photocatalytic properties of LaNiO3-based powders" in 5th Conference of the Serbian Society for Ceramic Materials, 5CSCS-2019, June 11-13, 2019, Belgrade, Serbia (2019):72,
https://hdl.handle.net/21.15107/rcub_rimsi_2030 .

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