Effect of the synthesis method on the properties of lithium doped graphene oxide composites with tin oxide nanoparticles: Towards white luminescence



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Prado Hurtado, Félix del and Taeño González, María and Maestre Varea, David and Ramírez Castellanos, Julio and González Calbet, José María and Cremades Rodríguez, Ana Isabel (2019) Effect of the synthesis method on the properties of lithium doped graphene oxide composites with tin oxide nanoparticles: Towards white luminescence. Journal of physics and chemistry of solids, 129 . pp. 133-139. ISSN 0022-3697

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Official URL: http://dx.doi.org/10.1016/j.jpcs.2019.01.006


Graphene oxide (GO) based composites functionalized with nanoparticles are emerging as potential candidates for multifunctional devices. As the synthesis route can strongly influence the way in which the nanoparticles are anchored to GO and the resulting properties, different routes have been employed and evaluated in this work for the preparation of composites formed by GO and undoped or Li doped SnO_2 nanoparticles. Promotion of synergetic effects, as well as changes in the structural and luminescent properties of the composites have been also analyzed. In comparison with GO, composite samples synthesized in this work involve enhanced luminescence while retaining nearly white emission, which could lead to wider applicability of GO based composites in free standing and emitting and sensing devices. Aspects, such as GO reduction, stabilization of different Sn-based oxides, variation in the concentration of oxygen related functional groups, changes in the sp^2 domain sizes, incorporation of lithium and enhancement of the luminescence, have been analyzed in this work by means of xray diffraction (XRD), high resolution transmission electron microscopy (HRTEM), energy dispersive x-ray spectroscopy (EDS), Raman spectroscopy, x-ray photoelectron spectroscopy (XPS) and photoluminescence (PL) characterizations.

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©2019 Pergamon Elsevier Science This work was supported by MINECO/FEDER/M-ERA.NET COFUND (Project MAT2015-65274-R, Project MAT2016-81720-REDC, and Project PCIN-2017-106). The authors are grateful to Matteo Amati (Elettra Sincrotrone, Trieste (Italy)) for his useful advices on the XPS measurements at the ESCA microscopy lines and Dr. J. Bartolome by his help with the chromaticity diagrams. The FPI grant holder, M.T., thanks the financial support from MINECO.

Uncontrolled Keywords:Quantum dots; Photoluminescence; Emission; zno; Adsorption; Multicolor; Reduction; Graphite; Red; Composite; Luminescence; Lithium; Tin oxide; Nanoparticles; Nanomaterials
Subjects:Sciences > Physics > Materials
Sciences > Physics > Solid state physics
ID Code:55621
Deposited On:07 Jun 2019 17:09
Last Modified:20 Jun 2019 09:19

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