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Article Abstract
Two-phase Ca-doped LaVO:Eu nanocrystals were prepared through a hydrothermal method with the help of SOD CITR and EDTA surfactants. The phase and morphology of the products were characterized by XRD and TEM, and the fluorescence performances were also recorded. The results indicated that Ca ions were doped into the LaVO:Eu host lattice, impeding the aggregation of the nanocrystals and enhancing the luminescence intensity. The morphology transformation process and luminescence enhancement were systematacially investigated. The fluorescence intensity of the two selected samples could be completely quenched by Fe ions without the disturbance of other ions, with the mechanism being due to the adsorption of Fe ions onto the grains and a subsequent energy transfer from Eu to Fe. Therefore, the present two Ca-doped LaVO:Eu samples can be applied as appropriate candidates for detecting Fe ions with agility and sensitivity in aqueous solution.
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