Building block magneto-luminescent nanomaterials of iron-oxide/ZnS@LaF3:Ce3+,Gd3+,Tb3+ with green emission
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Journal of Materials Chemistry C
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The preparation of novel triply-doped bifunctional Fe3O4/ZnS@LaF3:xCe3+,xGd3+,yTb3+ (x = 5; y = 5, 10
and 15 mol%) nanocomposites with efficient optical and magnetic features has been reported. The ZnS
semiconductor functionalized Fe3O4 particles were coated with LaF3:RE3+ materials via a chitosanassisted
co-precipitation method. The size of iron oxide B7.2 nm and trigonal structures of bifunctional
nanostructures were confirmed through X-ray diffraction and high-resolution transmission electron
microscopy. The static magnetic measurements supported and manifested the superparamagnetic behavior of
the materials at 300 K. A broad emission band was observed in the blue region (400–550 nm) due to the
sulphur vacancy on the surface of the Fe3O4/ZnS nanocomposite. For a triply doped bifunctional nanostructure,
the excitation spectra revealed broad absorption bands centered at around 270 nm, which
were attributed to the 4f(7F7/2) - 5d interconfigurational transition of the Ce3+ ion accompanied by narrow
absorption lines arising from the 4f–4f intraconfigurational transitions of the Tb3+ ion. The emission spectra
of the nanocomposites showed characteristic narrow emission lines assigned to the 5D4 - 7FJ transitions
(J = 6–0) of the Tb3+ ion. The energy transfer process from the Ce3+ - Gd3+ - Tb3+ ions has also been
presented and discussed. Furthermore, the structural, photoluminescence and magnetic properties of
Fe3O4/ZnS@LaF3:RE3+ suggested that it may be an efficient candidate for magnetic light-converting molecular
devices (MLMCDs) and high energy radiation detection.
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SHRIVASTAVA, NAVADEEP; KHAN, L.U.; KHAN, Z.U.; VARGAS, J.M.; MOSCOSO-LONDONO, O.; OSPINA, CARLOS; BRITO, H.F.; JAVED, YASIR; FELINTO, M.C.F.C.; MENEZES, A.S.; KNOBEL, MARCELO; SHARMA, S.K. Building block magneto-luminescent nanomaterials of iron-oxide/ZnS@LaF3:Ce3+,Gd3+,Tb3+ with green emission. Journal of Materials Chemistry C, v. 5, n. 9, p. 2282-2290, 2017. DOI: 10.1039/c6tc05053k. Disponível em: http://repositorio.ipen.br/handle/123456789/27861. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.