EDTA-assisted hydrothermal synthesis, characterization, and luminescent properties of YPO₄¡¤nH₂O:Eu³⁺ (n = 0, 0.8) microflakes and microbundles

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• 作者：Hejuan Song ; Liqun Zhou ; Ling Li ; Ting Wang ; Fei Hong ; Xinru Luo
• 关键词：YPO4· ; nH2O ; Eu3+ ; EDTA-assisted hydrothermal method ; Luminescence ; Mechanism
• 刊名：Materials Science and Engineering: B
• 出版年：2013
• 出版时间：20 September, 2013
• 年：2013
• 卷：178
• 期：16
• 页码：1012-1018
• 全文大小：2407 K

文摘

In this paper, the YPO₄:Eu³⁺ (5 % ) microflakes and YPO₄¡¤0.8H₂O:Eu³⁺ (5 % ) microbundles have been synthesized by a simple EDTA-assisted hydrothermal method. The X-ray powder diffraction (XRD), thermogravimetric and differential thermal analysis (TG/DTA), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) and photoluminescence (PL) were employed to characterize the as-obtained products. It was found that the composition of the product could be changed from YPO₄:Eu³⁺ (5 % ) to YPO₄¡¤0.8H₂O:Eu³⁺ (5 % ) with a further increase in the amount of EDTA 0.5-1.0 g. The YPO₄:Eu³⁺ (5 % ) presented the pure tetragonal phase and flake-like microstructure, while the YPO₄¡¤0.8H₂O:Eu³⁺ (5 % ) exhibited the hexagonal phase and bundle-like morphology. The possible formation mechanisms of the two architectures were put forward on the basis of different EDTA amount-morphology experiments. A detailed investigation on the photoluminescence of YPO₄¡¤nH₂O:Eu³⁺ (5 % ) different samples indicated that the luminescent properties of products were strongly dependent on the compositions, morphologies, coordination environment and crystal field symmetry.