Aqueous sol–gel synthesis and thermoanalytical study of the alkaline earth molybdate precursors

Braziulis, Gediminas; Janulevičius, Gytautas; Stankeviciute, Ruta; Žalga, Artūras

doi:10.1007/s10973-013-3579-0

Cited by 16 publications

(3 citation statements)

References 20 publications

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“…As expected, no significant presence of elemental carbon was detected (the levels were below 0.02% for all ENMs). The organic carbon content of up to 0.5% correlates well with the XPS data, which also showed traces of surface carbon, and is lower than those reported ( ca .10%) using sol-gel synthesis (Braziulis et al, 2014). The carbon is at very low levels and in its majority, is organic carbon that comes from residual organics produced during FSP process.…”

Section: Resultssupporting

confidence: 84%

Development of reference metal and metal oxide engineered nanomaterials for nanotoxicology research using high throughput and precision flame spray synthesis approaches

et al. 2018

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There is a growing need to develop and characterize reference metal and metal oxide engineered nanomaterials (ENMs) of high purity and tunable intrinsic properties suitable for nanotoxicology research. Here a high throughput (volume) and precision flame spray pyrolysis (FSP) approach coupled with state-of-the-art characterization techniques are utilized to generate such reference ENMs. The lab-based and industrially relevant FSP system, termed as Versatile Engineered Nanomaterials Generation System (VENGES), synthesizes the metals and metal oxides, at high throughput manner with controlled properties, such as primary particle size, aggregate diameter, shape, crystallinity, stoichiometry and surface chemistry. A nanopanel of nine reference ENMs (silica, silver, silver supported on silica, alumina, ceria and iron oxide) was synthesized and characterized using combined electron microscopy, advanced spectroscopic techniques and physical analyses (, BET, XRD, TEM, pycnometry, XPS, ICP-MS and FTIR). ENMs show a high degree of chemical purity and stoichiometry, and low content of carbon residuals, and are sterile and free of bacteria and endotoxins. Further, their colloidal properties and their implication in dosimetry have been also investigated in both environmental and test biological media. The suitability of reference ENMs and protocols developed in this study brings forth new arenas to generate reliable and reproducible toxicological data in an effort to reduce conflicting and contradicting inter-laboratory data on relative toxic effects of ENMs.

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Section: Resultssupporting

confidence: 84%

Development of reference metal and metal oxide engineered nanomaterials for nanotoxicology research using high throughput and precision flame spray synthesis approaches

et al. 2018

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“…All samples were indexed in a unit cell with a wolframite-type monoclinic structure (β-MgMoO 4 polymorph) with space group C 2 /m (number 12), in agreement with JCPDS 72-2153 and the literature. , The temperature increase of the heat treatment promoted an increased crystallinity and peak intensity, which is expected due to more energy and time being supplied to organize the MgMoO 4 crystals when compared with MgMoO 4 powder synthesized from spray pyrolysis. Braziulis et al showed similar features to MgMoO 4 powder synthesized by the sol–gel method, in which an increase in the crystallinity from the increase in the temperature was noted.…”

Section: Resultsmentioning

confidence: 68%

Atomistic Perspective on the Intrinsic White-Light Photoluminescence of Rare-Earth Free MgMoO₄ Nanoparticles

Santiago

Oliveira

Ribeiro

et al. 2020

Crystal Growth & Design

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Intrinsic white-light photoluminescent rare-earth free materials are promising candidates in the field of environment-friendly optical devices. They are important because whitelight materials such as LED devices contribute to safe-energy from photoluminescent emission, which simulates daylight in brightness and comfort at home and/or within industrial environments. Thus, it is a natural path that experimental and theoretical efforts can be combined to understand the best way to reach superior photoluminescent properties in materials. The ultrasonic spray pyrolysis method was employed in this study to synthesize shapeoriented MgMoO 4 nanoparticles with different morphologies after heat treament, which exhibits singular photoluminescence emission spectra with intrinsic white-light emission. For a deep discussion on the electronic structure, quantum mechanical calculations at the DFT/B3LYP level were performed such as in monoclinic β-MgMoO 4 bulk in its surfaces combined with the Wulff construction. The wideband approach was considered for investigating fundamental and excited electronic states (singlet and triplet). The morphological analysis indicates a thermal-active morphological modulation that induces the stabilization of hexagonal planes such as (100) and (010). The DFT calculations enabled us to understand the charge-transfer process along [MgO 6 ] and [MoO 4 ] clusters from characterizing fundamental singlet (s) and the excited singlet (s*) and triplet (t*) electronic states.

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“…The search and synthesis of new compounds are associated with the study of multicomponent systems. In terms of the formation of promising compounds, molybdate and tungstate systems are of great interest [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. Complex oxide compounds containing REE and elements of the IV B subgroup (Ti, Zr, Hf) are the objects of intensive research in connection with the search of new materials used as solid-state electrolytes, phosphors and matrices for immobilizing radioactive waste.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and luminescent properties of new tungstates Ln₂Zr(WO₄)₅ (Ln = Tb, Dy)

Базаров¹,

Dorzhieva²,

Shendrik³

et al. 2022

Chim.Tech.Acta

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New polycrystalline powder samples of double Ln2Zr(WO4)5 (Ln = Dy, Tb) tungstates were synthesized using high-temperature solid-phase and sol-gel methods. The conditions of the sol-gel synthesis of tungstates were optimized. The obtained phases were characterized by the X-ray powder diffraction on the basis of the crystallographic data of similar Ln–Zr molybdates. It is found that Ln2Zr(WO4)5 (Ln = Dy, Tb) double tungstates crystallize in the orthorhombic crystal system, space group Cmc21 (Z = 4). The intensive luminescence in the green spectral region for Tb2Zr(WO4)5 and yellow spectral region for Dy2Zr(WO4)5 was shown.

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Aqueous sol–gel synthesis and thermoanalytical study of the alkaline earth molybdate precursors

Cited by 16 publications

References 20 publications

Development of reference metal and metal oxide engineered nanomaterials for nanotoxicology research using high throughput and precision flame spray synthesis approaches

Development of reference metal and metal oxide engineered nanomaterials for nanotoxicology research using high throughput and precision flame spray synthesis approaches

Atomistic Perspective on the Intrinsic White-Light Photoluminescence of Rare-Earth Free MgMoO₄ Nanoparticles

Synthesis and luminescent properties of new tungstates Ln₂Zr(WO₄)₅ (Ln = Tb, Dy)

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Aqueous sol–gel synthesis and thermoanalytical study of the alkaline earth molybdate precursors

Cited by 16 publications

References 20 publications

Development of reference metal and metal oxide engineered nanomaterials for nanotoxicology research using high throughput and precision flame spray synthesis approaches

Development of reference metal and metal oxide engineered nanomaterials for nanotoxicology research using high throughput and precision flame spray synthesis approaches

Atomistic Perspective on the Intrinsic White-Light Photoluminescence of Rare-Earth Free MgMoO4 Nanoparticles

Synthesis and luminescent properties of new tungstates Ln2Zr(WO4)5 (Ln = Tb, Dy)

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Product

Resources

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Atomistic Perspective on the Intrinsic White-Light Photoluminescence of Rare-Earth Free MgMoO₄ Nanoparticles

Synthesis and luminescent properties of new tungstates Ln₂Zr(WO₄)₅ (Ln = Tb, Dy)