Strong photoluminescence and sensing performance of nanosized Ca0.8Ln0.1Na0.1WO4(Ln = Sm,Eu) compounds obtained by the dry “top-down” grinding method

Gómez, Germán E.; López, Carlos A.; Ayscue, R. Lee; Knope, Karah E.; Deluigi, María del Rosario Torres; Narda, Griselda E.

doi:10.1039/c9dt02109d

Cited by 7 publications

(3 citation statements)

References 39 publications

(30 reference statements)

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“…For all samples investigated, the overall emission decay process can be fitted only with a minimum of two exponential functions. This indicates the large influence of the surface, and it is quite normal for NPs due to the high surface-to-volume ratio. , Full data on emission decay fit parameters for all investigations carried out at RT and 77 K are given in SI Section S2.16 (Tables S12 and S20). Measured average lifetimes are somewhat shorter than that for typical Eu 3+ -doped systems (3.8–8.8 ms), − but are in the range of other Eu 3+ containing scheelites (0.3–0.9 ms). , The Eu 3+ overall emission decay process time in ME samples depends on the Eu 3+ content and varies from 0.901 ± 0.009 ms for the 1 at.…”

Section: Resultsmentioning

confidence: 99%

“…This indicates the large influence of the surface, and it is quite normal for NPs due to the high surface-to-volume ratio. 59,60 Full data on emission decay fit parameters for all investigations carried out at RT and 77 K are given in SI Section S2.16 (Tables S12 and S20). Measured average lifetimes are somewhat shorter than that for typical Eu 3+ -doped systems (3.8−8.8 ms), 61−63 but are in the range of other Eu 3+ containing scheelites (0.3−0.9 ms).…”

Section: ■ Introductionmentioning

confidence: 99%

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Effective Space Confinement by Inverse Miniemulsion for the Controlled Synthesis of Undoped and Eu³⁺-Doped Calcium Molybdate Nanophosphors: A Systematic Comparison with Batch Synthesis

Mazzariol,

Tajoli,

Sedykh

et al. 2023

ACS Appl. Nano Mater.

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The possibility to precisely control reaction outcomes for pursuing materials with well-defined features is a main endeavor in the development of inorganic materials. Confining reactions within a confined space, such as nanoreactors, is an extremely promising methodology which allows to ensure control over the final properties of the material. An effective room temperature inverse miniemulsion approach for the controlled synthesis of undoped and Eu3+-doped calcium molybdate crystalline nanophosphors was developed. The advantages and the efficiency of confined space in terms of controlling nanoparticle features like size, shape, and functional properties are highlighted by systematically comparing miniemulsion products with calcium molybdate particles obtained without confinement from a typical batch synthesis. A relevant beneficial impact of space confinement by miniemulsion nanodroplets is observed on the control of size and shape of the final nanoparticles, resulting in 12 nm spherical nanoparticles with a narrow size distribution, as compared to the 58 nm irregularly shaped and aggregated particles from the batch approach (assessed by TEM analysis). Further considerable effects of the confined space for the miniemulsion samples are found on the doping effectiveness, leading to a more homogeneous distribution of the Eu3+ ions into the molybdate host matrix, without segregation (assessed by PXRD, XAS, and ICP-MS). These findings are finally related to the photoluminescence properties, which are evidenced to be closely dependent on the Eu3+ content for the miniemulsion samples, as an increase of the relative intensity of the direct f–f excitation and a shortening of the lifetime (from 0.901 ms for 1 at. % to 0.625 ms for 7 at. % samples) with increasing Eu3+ content are observed, whereas no relationship between these parameters and the Eu3+ content is evidenced for the batch samples. All these results are ascribed to the uniform and controlled crystallization occurring inside each miniemulsion nanodroplet, as opposed to the less controlled nucleation and growth for a classic nonconfined approach.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Effective Space Confinement by Inverse Miniemulsion for the Controlled Synthesis of Undoped and Eu³⁺-Doped Calcium Molybdate Nanophosphors: A Systematic Comparison with Batch Synthesis

Mazzariol,

Tajoli,

Sedykh

et al. 2023

ACS Appl. Nano Mater.

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“…In addition to above, some unique studies which can potentially contribute to meeting SDGs have been reported: e.g., analysis of grinding processes (Bu et al, 2019;2020;Krauze et al, 2021;Nava et al, 2020;Prziwara et al, 2020a;Toraman, 2013), characterization and utilization of ground products (Arsoy et al, 2017;Choi et al, 2016;Gomez et al, 2019;Guzzo et al, 2019;2020;Letelier et al, 2019;Liu et al, 2015;Makuza et al, 2021;Okazaki et al, 2022;Peltoniemi et al, 2020;Yang et al, 2021). However, the grinding mechanism considerably changes depending on the type of grinding machine, which makes it difficult to evaluate the energy efficiency using a unified standard.…”

Section: Possible Contribution Of Dry Grinding To Sdgsmentioning

confidence: 99%

Environmentally Friendly Green Synthesis of Fine Particles by Dry Mechanical Processes Toward SDGs: A Review

Iwasaki

2023

KONA

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The United Nations Sustainable Development Goals (SDGs) have attracted much attention due to increasing interest in global social, energy and environmental problems. The immediate contribution to the achievement of the SDGs is required in all individual and industrial activities. The industries dealing with fine particles are also no exception to the demand and have actively worked on the contribution. Conventionally, fine particles have been industrially synthesized in gas, liquid and solid phases using top-down and bottom-up approaches. Among them, dry synthesis processes are promising from a viewpoint of the SDGs due to the solvent-free and simplicity, which can lead to energy saving, efficient resource utilization, waste management, etc. This review describes dry mechanical processes for synthesis of fine particles, particularly focusing on grinding and mechanochemical treatment.

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Two Series of Substituent‐Group‐Directed Adipate‐Based Lanthanide Coordination Polymers: Syntheses, Structures, Photoluminescence, and Magnetism

Zhang

Liu

et al. 2020

Eur J Inorg Chem

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Two series of lanthanide‐organic coordination polymers (CPs) [Ln2(L1)3(H2O)4] [Ln = Nd (1), Sm (2), Eu (3), Gd (4), Tb (5), and Dy (6), H2L1 = 3‐methyl‐adipic acid] and [Ln4(L2)6(H2O)4] [Ln = Nd (7), Sm (8), Eu (9), Gd (10), Tb (11), and Dy (12), H2L2 = 3‐tert‐butyl‐adipic acid] have been synthesized by the solvothermal reactions of lanthanide salts with two types of flexible substituent adipates. All of these CPs were characterized by single‐crystal X‐ray diffraction, elemental analysis, IR spectroscopy, powder X‐ray diffraction, and thermal analysis. Structural analyses reveal that CPs 1–6 and 7–12 are isostructural, respectively. CPs 1–6 show a two‐dimensional (2D) layer constructed from the 3‐methyl‐adipate anions bridging two types of binuclear Ln2 units. The adjacent 2D layers are further extended into a three‐dimensional (3D) supramolecular framework through the hydrogen‐bonding interactions. CPs 7–12 also exhibit a 2D structure. The carboxyl groups of 3‐tert‐butyl‐adipate link four types of TbIII ions to form a one‐dimensional (1D) inorganic TbIII chain. The neighboring 1D inorganic TbIII chains are further connected by the 3‐tert‐butyl‐adipate anions to construct a 2D network. The effect of substituent groups on the formation of adipate‐based lanthanide CPs as well as the photoluminescence and magnetic properties of 1–12 were investigated in detail.

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Strong photoluminescence and sensing performance of nanosized Ca_0.8Ln_0.1Na_0.1WO₄(Ln = Sm,Eu) compounds obtained by the dry “top-down” grinding method

Abstract: Two new nanosized lanthanide-doped materials (Sm and Eu) obtained by high-energy milling provided a suitable platform with solid-state photoluminescence properties for sensing applications.

Cited by 7 publications

References 39 publications

Effective Space Confinement by Inverse Miniemulsion for the Controlled Synthesis of Undoped and Eu³⁺-Doped Calcium Molybdate Nanophosphors: A Systematic Comparison with Batch Synthesis

Effective Space Confinement by Inverse Miniemulsion for the Controlled Synthesis of Undoped and Eu³⁺-Doped Calcium Molybdate Nanophosphors: A Systematic Comparison with Batch Synthesis

Environmentally Friendly Green Synthesis of Fine Particles by Dry Mechanical Processes Toward SDGs: A Review

Two Series of Substituent‐Group‐Directed Adipate‐Based Lanthanide Coordination Polymers: Syntheses, Structures, Photoluminescence, and Magnetism

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Strong photoluminescence and sensing performance of nanosized Ca0.8Ln0.1Na0.1WO4(Ln = Sm,Eu) compounds obtained by the dry “top-down” grinding method

Abstract: Two new nanosized lanthanide-doped materials (Sm and Eu) obtained by high-energy milling provided a suitable platform with solid-state photoluminescence properties for sensing applications.

Cited by 7 publications

References 39 publications

Effective Space Confinement by Inverse Miniemulsion for the Controlled Synthesis of Undoped and Eu3+-Doped Calcium Molybdate Nanophosphors: A Systematic Comparison with Batch Synthesis

Effective Space Confinement by Inverse Miniemulsion for the Controlled Synthesis of Undoped and Eu3+-Doped Calcium Molybdate Nanophosphors: A Systematic Comparison with Batch Synthesis

Environmentally Friendly Green Synthesis of Fine Particles by Dry Mechanical Processes Toward SDGs: A Review

Two Series of Substituent‐Group‐Directed Adipate‐Based Lanthanide Coordination Polymers: Syntheses, Structures, Photoluminescence, and Magnetism

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Strong photoluminescence and sensing performance of nanosized Ca_0.8Ln_0.1Na_0.1WO₄(Ln = Sm,Eu) compounds obtained by the dry “top-down” grinding method

Effective Space Confinement by Inverse Miniemulsion for the Controlled Synthesis of Undoped and Eu³⁺-Doped Calcium Molybdate Nanophosphors: A Systematic Comparison with Batch Synthesis

Effective Space Confinement by Inverse Miniemulsion for the Controlled Synthesis of Undoped and Eu³⁺-Doped Calcium Molybdate Nanophosphors: A Systematic Comparison with Batch Synthesis