Structural, electrical properties and photoluminescence analyses of the terbium doped barium titanate

Cernea, Marin; Secu, M.; Radu, Roxana; Ganea, Paul; Surdu, Vasile Adrian; Trușcă, Roxana; Vasile, Eugenia; Secu, Elisabeta Corina

doi:10.1016/j.jallcom.2021.160380

Cited by 10 publications

(4 citation statements)

References 54 publications

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“…Glass-ceramics band-gaps are similar to those reported by Madheshiya et al for glass-ceramics containing Bi 2 Ti 2 O 7 as the principal crystalline phase [32]. Moreover, it can also appreciate that all samples presented values lower than TiO 2 anatase (3-3.38 eV), the BaTiO 3 (3.2 eV), and the Bismuth Barium titanates (2.94-2.99), which have been reported as photocatalyst [43][44][45][46][47]. The results show that glass-ceramics produced could be promissory as photocatalytic materials.…”

Section: Discussionsupporting

confidence: 87%

Crystallization of Glasses Containing K2O, PbO, BaO, Al2O3, B2O3, and TiO2

et al. 2022

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The objective of this work was to obtain glass-ceramics from stable glasses, with a composition of barium, lead, and potassium titanate phases, for use as semiconductors. For this purpose, the glass-ceramic technique was used to control crystal growth and obtain a fine-grained microstructure. Various glasses containing K2O, PbO, BaO, Al2O3, B2O3, and TiO2 were prepared using a melt-quenching method. X-ray diffraction (XRD) and scanning electron microscopy (SEM) showed a single amorphous phase of all samples. Infrared spectra confirmed the presence of B-O bonds stretching vibrations of (B3O6)3− boroxol rings and BO3 triangles, as well as Ti-O stretching vibrations of (TiO6/2) and (AlO6/2) octahedral units. Thermal analyses confirmed the presence of one or more crystallization peaks in the range of 700 to 744 °C. On this base, they were heat-treated to promote crystal growth. XRD and SEM detected Ba4Ti12O27, Ti7O13, and BaTiO3 phases, homogeneously distributed throughout the material with fine crystallite size. In addition, crystallized glasses’ (glass-ceramics) properties were determined; the density values were 2.8–3.55 g/cm3; the chemical resistance to acidic and basic media was low; and the band-gap values were in the range of 2.88 to 3.05 eV. These results suggest that crystallized glasses may have application in photocatalysis.

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Section: Discussionsupporting

confidence: 87%

Crystallization of Glasses Containing K2O, PbO, BaO, Al2O3, B2O3, and TiO2

et al. 2022

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“…When Cernea et al explored the hydrothermal preparation of terbium-doped barium titanate; they looked at its structural, electrical, and photoluminescence properties. They found that the powders had a cube-shaped grain microstructure with an average particle size of between 75nm and 150nm, (Cernea et al, 2021). Kadira et al used the sol-gel method to test the dielectric properties of calcium-doped BT, and they found that the powders are in a pure perovskite phase without any secondary phases, (Kadira et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…It is well known that doping and grain size affect the ferroelectric ceramics' electric and optical characteristics. (Cernea et al, 2021). Dielectrics are materials with increased electrical resistivity, such materials have uses in pulsed capacitor technology due to their high energy storage density, strong temperature stability, and para-electric, piezoelectric, and ferroelectric characteristics.…”

Section: Introductionmentioning

confidence: 99%

Advances in the synthesis, characterizations and applications of barium titanate. A review

Lariski,

Zangina,

Ndikilar

et al. 2023

dujopas

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Barium titanate (BaTiO3) is a compound that has a structure called perovskite. Synthesis of BaTiO3 can be done by employing separate methods. BaTiO3 has four polymorphs which are cubic, tetragonal, orthorhombic and rhombohedral, depending on the temperature, it has a tetragonal structure at ambient temperature. This paper aims to review different synthesis methods of BaTiO3, these techniques can be used in the process of making ceramics as a molding material and also as an intermediate between thin films of metal oxides in various applications. The characterization techniques mostly used in determining the lattice constant, crystal structure functional group, morphology, elemental compositions and electrical properties, of the nanomaterial, including the various applications of BaTiO3 which includes modern electronic appliances and electrical power systems, the Multilayer Ceramic Capacitors (MLCs), biological, and microwave absorption, due to their piezoelectric and dielectric properties are reviewed.

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“…However, due to the prohibition of the 4f-4f transition, the absorption and emission intensity of the rare earth ion itself is very weak [ 33 ]. When lanthanide ions are coordinated with small molecular organic ligands (such as 2-thienyl trifluoroacetone (TTA), acetylacetone (acac), and 1,10-phenanthroline (phen)), the fluorescent properties of lanthanide complexes can be significantly improved through the antenna effect [ 34 , 35 , 36 ]. Therefore, if the local environment of the coordination complex changes, such as via ligand exchange, these changes can be sensitively detected by the resulting change in fluorescence intensity.…”

Section: Introductionmentioning

confidence: 99%

Lanthanide (Eu3+/Tb3+)-Loaded γ-Cyclodextrin Nano-Aggregates for Smart Sensing of the Anticancer Drug Irinotecan

Guo

Liu

Tang

et al. 2022

IJMS

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The clinical use of anticancer drugs necessitates new technologies for their safe, sensitive, and selective detection. In this article, lanthanide (Eu3+ and Tb3+)-loaded γ-cyclodextrin nano-aggregates (ECA and TCA) are reported, which sensitively detects the anticancer drug irinotecan by fluorescence intensity changes. Fluorescent lanthanide (Eu3+ and Tb3+) complexes exhibit high fluorescence intensity, narrow and distinct emission bands, long fluorescence lifetime, and insensitivity to photobleaching. However, these lanthanide (Eu3+ and Tb3+) complexes are essentially hydrophobic, toxic, and non-biocompatible. Lanthanide (Eu3+ and Tb3+) complexes were loaded into naturally hydrophilic γ-cyclodextrin to form fluorescent nano-aggregates. The biological nontoxicity and cytocompatibility of ECA and TCA fluorescent nanoparticles were demonstrated by cytotoxicity experiments. The ECA and TCA fluorescence nanosensors can detect irinotecan selectively and sensitively through the change of fluorescence intensity, with detection limits of 6.80 μM and 2.89 μM, respectively. ECA can safely detect irinotecan in the cellular environment, while TCA can detect irinotecan intracellularly and is suitable for cell labeling.

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Structural, electrical properties and photoluminescence analyses of the terbium doped barium titanate

Cited by 10 publications

References 54 publications

Crystallization of Glasses Containing K2O, PbO, BaO, Al2O3, B2O3, and TiO2

Crystallization of Glasses Containing K2O, PbO, BaO, Al2O3, B2O3, and TiO2

Advances in the synthesis, characterizations and applications of barium titanate. A review

Lanthanide (Eu3+/Tb3+)-Loaded γ-Cyclodextrin Nano-Aggregates for Smart Sensing of the Anticancer Drug Irinotecan

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