Synthesis and characterization of Ca{sup 2+} substituted barium niobate nanopaticles for photocatalytic and luminescence applications

Journal Article · Thu Sep 15 00:00:00 EDT 2016 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2016.04.030· OSTI ID:22581618

Dudhe, C. M. ^[1]; Nagdeote, S. B. ^[2]

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1. Department of Physics, Government Institute of science, Nagpur 440001 (India)
2. Department of Physics, Amolakchand Mahavidhyalaya, Yavatmal 445001 (India)

Highlights: • Nanoparticles of Ca{sup 2+} (30 mol%) substituted BaNb{sub 2}O{sub 6} were synthesized. • Ca{sup 2+} ions occupy newer 8d Wyckoff positions rather than 4c. • Self-activated photoluminescence was observed. • Excellent H{sub 2} generation tendency from pure water under UV light was also observed. - Abstract: Ca{sup 2+} substituted barium niobate i.e. Ca{sub x}Ba{sub 1-x}Nb{sub 2}O{sub 6} (x = 0.3) compound in nanoparticles form was synthesized by a simple co-precipitation method for the first time and its structural characterization has been done by using powder X-ray diffraction data. Other characterizations were done by using transmission electron microscopy, energy dispersive X-ray spectroscopy, Fourier transform infrared spectroscopy and ultraviolet-visible spectroscopy. It was found that the Ca{sub x}Ba{sub 1-x}Nb{sub 2}O{sub 6} (x = 0.3) compound stabilizes in the orthorhombic phase (Pbcn space group) with the lattice parameters a = 14.984 Å, b = 5.761 Å and c = 5.216 Å. A representative TEM image shows the irregular sphere like morphology of the synthesized particles with the size ranging from 70 to 120 nm. The optical band gap energy was found to be 3.74 eV. It was observed that the synthesized nanoparticles exhibit excellent H{sub 2} evolution tendency and self–activated photoluminescence under the excitation of UV light. These activities were assigned to the nanocrystalline nature of the synthesized material.

• OSTI ID: 22581618
• Journal Information: Materials Research Bulletin, Vol. 81; Other Information: Copyright (c) 2016 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM COMPOUNDS
CALCIUM IONS
COPRECIPITATION
CRYSTALS
EXCITATION
FOURIER TRANSFORMATION
LATTICE PARAMETERS
NANOPARTICLES
NANOSTRUCTURES
NIOBATES
ORTHORHOMBIC LATTICES
PHOTOCATALYSIS
PHOTOLUMINESCENCE
POWDERS
SYNTHESIS
TRANSMISSION ELECTRON MICROSCOPY
ULTRAVIOLET RADIATION
X-RAY DIFFRACTION
X-RAY SPECTROSCOPY