Study of surfaces and morphologies of proteic sol–gel derived barium aluminate nanopowders: An experimental and computational study

Rezende, Marcos V. dos S.; Arrouvel, Corinne; Parker, Stephen C.; Rey, J. F. Q.; Valério, Mário E.G.

doi:10.1016/j.matchemphys.2012.08.050

Cited by 22 publications

(7 citation statements)

References 36 publications

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“…In the next step the xerogel is calcined at 1100 °C for 2 hours. More details of the procedure can be found in a previous reference [28]. The existence of a single crystalline phase was confirmed by X-ray diffraction measurements.…”

Section: Methodsmentioning

confidence: 92%

A computational and spectroscopic study of Dy3+ doped BaAl2O4 phosphors

et al. 2018

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Computational and experimental methods are employed to study the optical properties of Dy-doped BaAl 2 O 4 matrix. Atomistic modelling is used to make predictions of Dy doping sites and charge compensation schemes. The symmetry predicts from atomistic modeling was used to calculate crystal field parameters and to obtain the energies of the electronic transitions of the Dy 3+ ion. Dy-doped BaAl 2 O 4 was prepared via a sol-gel proteic technique. The optical properties were studied using X-ray excited optical luminescence (XEOL) measurements. The X-ray absorption near-edge structure (XANES) at the Ba and Eu L III -edges exhibits typical absorption spectra. The area under the XEOL spectra increases as the photon energy increases in the region around the Ba and Dy L III -edges. The XEOL spectra showed typical Dy lines. Experimental and calculated values for the transition energies are compared.

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Section: Methodsmentioning

confidence: 92%

A computational and spectroscopic study of Dy3+ doped BaAl2O4 phosphors

et al. 2018

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“…[19]. XANES spectra also were collected continuously during all thermal treatments (heating, setting and cooling).…”

Section: Methodsmentioning

confidence: 99%

Study of Eu3+→Eu2+ reduction in BaAl2O4:Eu prepared in different gas atmospheres

Rezende¹,

Valério²,

Jackson³

2015

Materials Research Bulletin

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“…The main advantage of using powdered coconut water (PCW) instead of fresh or bottled coconut water for the sol-gel synthesis of ceramic materials is the control of the concentration of PCW in the process that ensures the reproducibility of the synthesis. This type of sol-gel route also shares the conveniences of the protein-type sol-gel [ 31 , 32 ] (coconut water, gelatin) or Pechini type [ 33 ] (citric acid with ethylene glycol) since these routes can increase the quality of the produced materials and reduce synthesis costs, temperature [ 34 ], and environmental contamination. These types of sol-gel routes are an alternative to the conventional sol-gel method in which metal alkoxide precursors are used.…”

Section: Introductionmentioning

confidence: 99%

Nanostructured LiFe5O8 by a Biogenic Method for Applications from Electronics to Medicine

et al. 2021

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The physical properties of the cubic and ferrimagnetic spinel ferrite LiFe5O8 has made it an attractive material for electronic and medical applications. In this work, LiFe5O8 nanosized crystallites were synthesized by a novel and eco-friendly sol-gel process, by using powder coconut water as a mediated reaction medium. The dried powders were heat-treated (HT) at temperatures between 400 and 1000 °C, and their structure, morphology, electrical and magnetic characteristics, cytotoxicity, and magnetic hyperthermia assays were performed. The heat treatment of the LiFe5O8 powder tunes the crystallite sizes between 50 nm and 200 nm. When increasing the temperature of the HT, secondary phases start to form. The dielectric analysis revealed, at 300 K and 10 kHz, an increase of ε′ (≈10 up to ≈14) with a tanδ almost constant (≈0.3) with the increase of the HT temperature. The cytotoxicity results reveal, for concentrations below 2.5 mg/mL, that all samples have a non-cytotoxicity property. The sample heat-treated at 1000 °C, which revealed hysteresis and magnetic saturation of 73 emu g−1 at 300 K, showed a heating profile adequate for magnetic hyperthermia applications, showing the potential for biomedical applications.

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Study of surfaces and morphologies of proteic sol–gel derived barium aluminate nanopowders: An experimental and computational study

Cited by 22 publications

References 36 publications

A computational and spectroscopic study of Dy3+ doped BaAl2O4 phosphors

A computational and spectroscopic study of Dy3+ doped BaAl2O4 phosphors

Study of Eu3+→Eu2+ reduction in BaAl2O4:Eu prepared in different gas atmospheres

Nanostructured LiFe5O8 by a Biogenic Method for Applications from Electronics to Medicine

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