Effects of thermal treatment on the structure and luminescent properties of Eu 3+ doped SiO 2 –PMMA hybrid nanocomposites prepared by a sol–gel process

Jesus, Filipe Augusto de; Santos, Simei Tarse Sobrinho; Caiut, José Maurício A.; Sarmento, Víctor Hugo Vitorino

doi:10.1016/j.jlumin.2015.05.030

Cited by 15 publications

(6 citation statements)

References 48 publications

(58 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Judd-Ofelt intensity parameters (Ω 2 , Ω 4 ), the radiative emission rates (A rad ), the radiative and experimental lifetimes (τ rad , τ exp ), and the 5 D 0 quantum efficiency (η) were determined as described in a previous work [42,43]. The values of Ω 2 obtained for YVO 4 :Eu 3+ and YVO 4 :Eu 3+ /γ-Al 2 O 3 (7.8 and 8.4×10 −20 cm −2 , respectively) are close to reported values [44].…”

Section: Resultsmentioning

confidence: 99%

One-step synthesis of luminescent YVO₄:Eu³⁺/γ-Al₂O₃nanocomposites by spray pyrolysis

2017

View full text Add to dashboard Cite

Spray pyrolysis (SP) easily affords nano or sub-micro phosphor particles even on an industrial scale. However, control of the coordination environment around the emitting ion is inefficient, and the final solid matrix will dictate the symmetry of the emitter. Moreover, the fast heat treatment typical of SP usually results in heterogeneous symmetry sites. This paper aimed to obtain inorganic matrices incorporated with phosphors by SP while keeping the symmetry of the emitting ion unchanged along the pyrolysis process. Nanoparticles consisting of Eu-doped YVO phosphors with average diameter of 15 nm were prepared by the co-precipitation method and were subsequently incorporated into the alumina matrix by SP, to yield YVO:Eu/γ-AlO composite particles with mean size of 600 nm. X-ray powder diffraction confirmed that the vanadate particles were incorporated into the alumina matrix, and that the γ-AlO phase emerged. The band due to the [Formula: see text] → Eu transition intensified as a consequence of the incorporation of YVO:Eu into alumina-the suppression effects caused by the surface properties of the YVO:Eu phosphor nanoparticles diminished, while the structure of Eu remained unchanged in the matrix.

show abstract

Section: Resultsmentioning

confidence: 99%

One-step synthesis of luminescent YVO₄:Eu³⁺/γ-Al₂O₃nanocomposites by spray pyrolysis

2017

View full text Add to dashboard Cite

show abstract

“…Both reagents were put together and stirred for 5 more minutes. Then, the obtained sol was transferred to eppendorf tubes and dried on a stove at 60 °C for 24 h. After drying, the monolithic body was mortified and thermally treated at 200 °C for 3 h so as to enhance the luminescent properties of Eu 3+ ions in these samples …”

Section: Experimental Methodsmentioning

confidence: 99%

“…There have been only a few reports on the luminescent features of Europium compounds in SiO 2 –PMMA hybrid host. − Nevertheless, these papers are from different authors with distinct aims (behavior analysis of various Eu 3+ complexes in this hybrid material). As a result there had been no systematic structural studies concerning Eu 3+ -doped SiO 2 –PMMA (Eu 3+ :SiO 2 –PMMA) samples until the first paper published by our group . However, the works of Bian et.al .…”

Section: Introductionmentioning

confidence: 99%

Local Coordination, Influence on Synthesis and Luminescent Features of Eu³⁺ Ions in SiO₂–Poly(methyl methacrylate) Hybrid Materials

Jesus

Santana

Caiut

et al. 2018

Ind. Eng. Chem. Res.

Self Cite

View full text Add to dashboard Cite

Because of the tunability of properties demonstrated by organic−inorganic hybrid materials, they have attracted considerable attention in recent years. However, despite luminescence being one of the major research topics involving hybrids, SiO 2 −poly(methyl methacrylate) (PMMA) systems have been poorly explored. In this paper, Eu 3+ :SiO 2 −PMMA samples were prepared with different Eu 3+ /Si molar ratios in order to determine Eu 3+ local coordination, the potential interferences of these ions on synthesis reactions and the optimized lanthanide concentration for improved luminescence output. Careful analysis of FTIR spectra showed the presence of Eu 3+ ions coordinated to carbonyl groups in the hybrid matrix, while TG results, allied to FTIR, indicate dopant influence on the mechanisms of formation of polymeric chains. Photoluminescence results showed that, at higher lanthanide contents, the position of the 5 D 0 → 7 F 0 band and spectroscopic parameters are modified, a clear signal of the formation of lanthanide clusters, which results in concentration quenching of luminescence.

show abstract

“…These advantages will accelerate their applications greatly in enable expandable and foldable screens for smartphones, wearable or fashionable electronic clothing, rollable or collapsible wallpaper-like lamps and biocompatible light sources for in vivo or epidermal medical devices [4][5][6]. In the past few decades, polymer-rare earth complexes have achieved great progress, various luminescent polymer-rare earth complexes (polystyrene (PS), polymethyl methacrylate (PMMA) and polysulfone (PSF)) were prepared [2,7,8]. However, an increasing attention has been paid to the potential impact on the environmental systems because of their non-degradability.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterisation of luminescent composite materials based on polylactic acid

Zhu

Cheng

et al. 2019

Micro & Nano Letters

View full text Add to dashboard Cite

A ternary complex of Tb(SSA) 3 Phen was synthesised based on terbium(III) (Tb 3+) ion and the ligands including 1,10-phenanthroline (Phen) and 5-sulfosalicylic acid (SSA). Then a series of polylactic acid (PLA)/Tb(SSA) 3 Phen composites were prepared by the melt-mixing process. The luminescent properties of PLA/Tb(SSA) 3 Phen composite films were investigated by fluorescence spectrophotometry. The spectra of all composites indicated that PLA/Tb(SSA) 3 Phen composites shown the characteristic bright green fluorescence which originated from Tb(SSA) 3 Phen. Moreover, the energy absorption and transfers of Tb(SSA) 3 Phen were slightly affected by the PLA matrix. The optical transmittance of the composites was measured by the UV-vis spectrometer. The results demonstrated that Tb (SSA) 3 Phen can ameliorate the PLA film transparence, which well dispersed in the PLA matrix. Moreover, the thermal properties, crystal structure and the mechanical properties of PLA/Tb(SSA) 3 Phen composite were also investigated to determine the potential usage as a green fluorescent material.

show abstract

Effects of thermal treatment on the structure and luminescent properties of Eu 3+ doped SiO 2 –PMMA hybrid nanocomposites prepared by a sol–gel process

Cited by 15 publications

References 48 publications

One-step synthesis of luminescent YVO₄:Eu³⁺/γ-Al₂O₃nanocomposites by spray pyrolysis

One-step synthesis of luminescent YVO₄:Eu³⁺/γ-Al₂O₃nanocomposites by spray pyrolysis

Local Coordination, Influence on Synthesis and Luminescent Features of Eu³⁺ Ions in SiO₂–Poly(methyl methacrylate) Hybrid Materials

Preparation and characterisation of luminescent composite materials based on polylactic acid

Contact Info

Product

Resources

About

Effects of thermal treatment on the structure and luminescent properties of Eu 3+ doped SiO 2 –PMMA hybrid nanocomposites prepared by a sol–gel process

Cited by 15 publications

References 48 publications

One-step synthesis of luminescent YVO4:Eu3+/γ-Al2O3nanocomposites by spray pyrolysis

One-step synthesis of luminescent YVO4:Eu3+/γ-Al2O3nanocomposites by spray pyrolysis

Local Coordination, Influence on Synthesis and Luminescent Features of Eu3+ Ions in SiO2–Poly(methyl methacrylate) Hybrid Materials

Preparation and characterisation of luminescent composite materials based on polylactic acid

Contact Info

Product

Resources

About

One-step synthesis of luminescent YVO₄:Eu³⁺/γ-Al₂O₃nanocomposites by spray pyrolysis

One-step synthesis of luminescent YVO₄:Eu³⁺/γ-Al₂O₃nanocomposites by spray pyrolysis

Local Coordination, Influence on Synthesis and Luminescent Features of Eu³⁺ Ions in SiO₂–Poly(methyl methacrylate) Hybrid Materials