Morphology evolution of Gd0.99Eu0.01BO3 phosphors synthesized by hydrothermal method with Gd0.99Eu0.01(OH)3 nanorods as sacrificial precursors

Zhu, Yongwei; Liang, Yujun; Liu, Shiqi; Li, Kai; Wu, Xiaoping; Xu, Rui

doi:10.1016/j.jallcom.2016.06.215

Cited by 6 publications

(4 citation statements)

References 66 publications

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“…It is the important, therefore, to understand the mechanisms, including reaction mechanisms and growth mechanisms, involved. To date, there have been few studies on the reaction mechanism and growth mechanism of borate‐based phosphors prepared by either one‐step hydrothermal or two‐step hydrothermal methods . The reaction and growth mechanisms of two‐step hydrothermal methods are still unclear, as studies on these mechanisms have been very few.…”

Section: Introductionsupporting

confidence: 62%

Synthesis and luminescence properties of Ca₃(BO₃)₂:Eu³⁺ via two‐step method

et al. 2018

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Novel Ca B O ·H O:Eu nanotubes, constructed with nanobelts, were prepared using a hydrothermal method. The Ca (BO ) :Eu nanobelts with a thickness of about 100 nm were made for the first time using a two-step hydrothermal process with Ca B O ·H O:Eu as the precursor. The samples were characterized by energy dispersive X-ray spectroscopy, X-ray diffraction, Fourier transform infra-red spectroscopy, thermogravimetry differential thermal analysis and scanning electron microscopy. The relationship between Ca (BO ) :Eu and Ca B O ·H O:Eu was also studied. Possible reaction and growth mechanisms for Ca B O ·H O:Eu and Ca (BO ) :Eu were proposed. Ca (BO ) :Eu preserved the basic microstructure unit of Ca B O ·H O:Eu . Both Ca B O ·H O:Eu and Ca (BO ) :Eu exhibited red emissions centred at 614 nm, but the maximum excitation peaks for Ca B O ·H O:Eu and Ca (BO ) :Eu differed. Ca (BO ) :Eu exhibited higher photoluminescence intensity but a lower R/O value than Ca B O ·H O:Eu .

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Section: Introductionsupporting

confidence: 62%

Synthesis and luminescence properties of Ca₃(BO₃)₂:Eu³⁺ via two‐step method

et al. 2018

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“…Observed variation in morphologies was explained based on the Ostwald ripening process . Mono‐dispersed, mono‐concave, micro‐sphere/micro‐flower/nano‐sheet of GdBO 3 :Eu were prepared by Zhu et al . It was observed in this study that samples prepared by hydrothermal method exhibited improved red to orange emission intensity ratio as compared to the sample prepared by solid state reaction.…”

Section: Introductionmentioning

confidence: 76%

“…Vaterite form of GdBO 3 , both in bulk and nano‐size dimensions, was prepared in different morphologies . As luminescence from Eu 3+ species is very sensitive to local environment and morphological changes, it is generally used as a probe in many of the above mentioned studies to monitor structural changes.…”

Section: Introductionmentioning

confidence: 99%

Synthesis Conditions on the Nature of GdBO₃ Phase Formed

et al. 2018

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Present study has been carried out to develop a facile synthetic methodology for preparing single phase monoclinic and triclinic forms of GdBO3, a potential phosphor material. This is achieved by varying annealing temperatures and annealing steps. Detailed structural studies, using X‐ray diffraction (XRD), Fourier transform infrared (FTIR) and Raman spectroscopic techniques confirmed that, Gd3+‐boric acid complexes formed initially at low temperatures (300 °C or less) get converted to monoclinic and triclinic forms of GdBO3 depending upon annealing temperatures, annealing steps and heating rates. Multiple steps with slow heating rates (∼3 °C/min) lead to the formation of single phase triclinic form of GdBO3. Two step heating with relatively faster heating rates (5 °C/min and above) results in single phase monoclinic GdBO3. FTIR and Raman studies also confirmed that boron exists only as BO4 structural units (in the form of B3O93− rings) in monoclinic GdBO3 and as BO3 structural units in triclinic GdBO3. Luminescence studies carried out with Eu3+ as a probe species confirmed more covalent nature around Eu3+/Gd3+ ions with improved red colour emission from triclinic form of GdBO3 compared to the monoclinic form.

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“…7(a) The room temperature excitation spectrum (Fig. 7(c [44]. Several peaks from 300 to 540 nm (Fig.…”

Section: Vibrational Analysismentioning

confidence: 99%

Synthesis of GdBO3:Eu3+ nanophosphors via acetylacetone assisted aqueous sol–gel route: Effect of some synthesis parameters

Seraiche¹,

Guerbous

Mahiou

et al. 2020

Optical Materials

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Nano-sized Eu 3+ -doped GdBO 3 vaterite type nanophosphors have been synthesized successfully via acetylacetone assisted aqueous sol-gel route. Systematic investigation of the influence of Eu 3+ ion content and pH value of the suspension of precursors on structural, morphological and luminescence spectroscopic properties has been performed. X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, field emission-scanning electron microscopy (FE-SEM), Thermogravimetric and differential thermal gravimetry (TG/DTA), room temperature steady and time resolved photoluminescence (PL) spectroscopy techniques were employed to characterize the obtained powder samples. It has been found that the Eu 3+ ion content and pH value precursors suspension have important effect on the structural, morphology and emission properties. The XRD analysis reveals that GdBO 3 : 10% mol Eu 3+ synthesized at pH = 2 and pH = 10 exhibit the quasi-purest P6 3 /mmc vaterite structure. The vibrational absorption of (BO 3 ) 3group is assigned to the GdBO 3 with calcite type or other vaterite structure namely triclinic and monoclinic. The morphologies of GdBO 3 particles size increases with increasing of pH value. All sample present only the orange-red colors emission from 5 D 0 levels to the 7 F J levels (J = 0-3) of Eu 3+ ion. Furthermore, it was found that 10% concentration of Eu 3+ presents the quenching of emission in GdBO 3 . Also, it was that the emission intensity was affected by the pH value and sample with pH = 10 exhibits the highest emission intensity. The asymmetry ratio parameter R between red M. Seraiche a, *

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Morphology evolution of Gd0.99Eu0.01BO3 phosphors synthesized by hydrothermal method with Gd0.99Eu0.01(OH)3 nanorods as sacrificial precursors

Cited by 6 publications

References 66 publications

Synthesis and luminescence properties of Ca₃(BO₃)₂:Eu³⁺ via two‐step method

Synthesis and luminescence properties of Ca₃(BO₃)₂:Eu³⁺ via two‐step method

Synthesis Conditions on the Nature of GdBO₃ Phase Formed

Synthesis of GdBO3:Eu3+ nanophosphors via acetylacetone assisted aqueous sol–gel route: Effect of some synthesis parameters

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Morphology evolution of Gd0.99Eu0.01BO3 phosphors synthesized by hydrothermal method with Gd0.99Eu0.01(OH)3 nanorods as sacrificial precursors

Cited by 6 publications

References 66 publications

Synthesis and luminescence properties of Ca3(BO3)2:Eu3+ via two‐step method

Synthesis and luminescence properties of Ca3(BO3)2:Eu3+ via two‐step method

Synthesis Conditions on the Nature of GdBO3 Phase Formed

Synthesis of GdBO3:Eu3+ nanophosphors via acetylacetone assisted aqueous sol–gel route: Effect of some synthesis parameters

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Product

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Synthesis and luminescence properties of Ca₃(BO₃)₂:Eu³⁺ via two‐step method

Synthesis and luminescence properties of Ca₃(BO₃)₂:Eu³⁺ via two‐step method

Synthesis Conditions on the Nature of GdBO₃ Phase Formed