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Issue 35, 2017
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Europium-doped NaGd(WO4)2 nanophosphors: synthesis, luminescence and their coating with fluorescein for pH sensing

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Abstract

Uniform Eu-doped NaGd(WO4)2 nanophosphors with a spherical shape have been synthesized for the first time by using a wet chemistry method based on a homogeneous precipitation process at low temperature (120 °C) in ethylene glycol/water mixtures. The obtained nanoparticles crystallized into the tetragonal structure and presented polycrystalline character. The europium content in such phosphors has been optimized through the analysis of the luminescence dynamics (lifetime measurements). By coating the Eu3+-doped wolframate based nanoparticles with fluorescein through a layer-by-layer (LbL) approach, a wide range (4–10) ratiometric pH-sensitive sensor has been developed, which uses the pH insensitive emission of Eu3+ as a reference.

Graphical abstract: Europium-doped NaGd(WO4)2 nanophosphors: synthesis, luminescence and their coating with fluorescein for pH sensing

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Publication details

The article was received on 01 Jun 2017, accepted on 20 Jul 2017 and first published on 21 Jul 2017


Article type: Paper
DOI: 10.1039/C7DT01986F
Citation: Dalton Trans., 2017,46, 11575-11583
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    Europium-doped NaGd(WO4)2 nanophosphors: synthesis, luminescence and their coating with fluorescein for pH sensing

    M. Laguna, A. Escudero, N. O. Núñez, A. I. Becerro and M. Ocaña, Dalton Trans., 2017, 46, 11575
    DOI: 10.1039/C7DT01986F

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