Synthesis by an ionic liquid-assisted method and optical properties of nanoflower Y{sub 2}O{sub 3}
- Department of Electrical and Electronic Engineering, Malek Ashtar University of Technology, Tehran (Iran, Islamic Republic of)
Flower-like Y{sub 2}O{sub 3} nano-/microstructured phosphors without metal activators have successfully been fabricated by an ionic liquid (IL)-assisted method involving temperature (600 {sup o}C) annealing. In this paper, the effect of IL concentration on the morphology of the product has been investigated. The IL plays a crucial role in the formation of various morphologies of Y{sub 2}O{sub 3}. The structural and morphological features of the obtained samples have been characterized by means of X-ray powder diffraction (XRD) analysis, photoluminescence spectra (PL), Fourier-transform infrared (FT-IR) spectra and X-ray photoelectron spectra (XPS). The photoluminescence spectra of the products exhibit an intense bluish-white emission (ranging from 405 to 430 nm and centered at 418 nm). The luminescent mechanisms have been ascribed to the carbon impurities in the Y{sub 2}O{sub 3} host. The effect of the ILs cation and the counter anions on the Y{sub 2}O{sub 3} morphology of these nanostructures was studied experimentally. It was observed that Y{sub 2}O{sub 3} morphology and PL of these nanostructures were strongly influenced by the type of cation and anion. As the length of the subsidiary chain of cation section of IL (imidaziole ione) reduces, the thickness of the nano-sheets increases. It is expected that the present method may easily be extended to similar nano-/microstructures of other oxide materials. Such investigations are currently underway.
- OSTI ID:
- 22207345
- Journal Information:
- Materials Research Bulletin, Vol. 45, Issue 8; Other Information: Copyright (c) 2010 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
Similar Records
Ionic liquids-modulated two-phase thermal synthesis of three-dimensional CuS nanostructures
Controlled synthesis of monodispersed AgGaS{sub 2} 3D nanoflowers and the shape evolution from nanoflowers to colloids