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ytterbium-compounds
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Enhanced TiO2broadband photocatalytic activity based on very small upconversion nanosystems
, Article Journal of Physical Chemistry C ; Volume 125, Issue 25 , 2021 , Pages 13788-13801 ; 19327447 (ISSN) ; Madaah Hosseini, H. R ; Mohajerani, E ; Pedroni, M ; Taheri Ghahrizjani, R ; Sharif University of Technology
American Chemical Society
2021
Abstract
Efficient sunlight harvesting is of great significance for environmental remediation through photocatalysis. Herein, very small (20 nm) upconverter SrF2:Yb,Tm@CaF2:Yb@Fluorine-doped TiO2heteronanoparticles (denoted as UCNPs@TiO2) with strong UV-blue emission and broadband photocatalytic performance were prepared via a facile three-step hydrothermal method for the first time. The SrF2:Yb,Tm upconverter nanoparticles (NPs) were produced as the light-emitting core, epitaxially grown CaF2:Yb as the middle shell to enhance the upconversion luminescence output and TiO2as the photocatalyst outermost layer. Superior photocatalytic functioning of UCNPs@TiO2was affirmed through methylene blue (MB)...
Influence of Y3+, Yb3+, Gd3+ cations on structural and electromagnetic properties of CuFe2O4 nanoferrites prepared via one step sol-gel method
, Article Journal of Rare Earths ; Volume 39, Issue 10 , 2021 , Pages 1224-1231 ; 10020721 (ISSN) ; Akhtar, M. N ; Yousaf, M ; Batoo, K. M ; Aldossary, O. M ; Khan, S. N ; Sharif University of Technology
Editorial Office of Chinese Rare Earths
2021
Abstract
Rare earths (REs) play a key role in distorting spinel structure by creating some defects at the lattice sites and make them suitable for magnetodielectric applications. In the present study, the nanoferrites of CuRE0.02Fe1.98O4, where REs = Y3+, Yb3+, Gd3+, were prepared using one step sol–gel method. The prepared samples are copper ferrite (CFO), yttrium doped copper ferrite (Y-CFO), ytterbium doped copper ferrite (Yb-CFO) and gadolinium doped copper ferrite (Gd-CFO), respectively. The single-phase structure of all the REs doped nanoferrites was determined by X-ray diffraction (XRD) analysis. The porosity, agglomerations and grain size of the REs doped copper ferrite were examined using...