Cerium-doped mesoporous BaTiO3/TiO2 nanocomposites: structural, optical and photocatalytic properties

Khalyavka, Т. A.; Shcherban, Nataliya D.; Shymanovska, V.; Manuilov, E. V.; Permyakov, V. V.; Щербаков, С. М.

doi:10.1007/s11164-019-03888-z

Cited by 14 publications

(6 citation statements)

References 33 publications

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“…Table 3 shows the values of the FTIR bands of the investigated samples. The Ti-O-Ti and Zr-O-Zr stretching vibrations appear in the 544-573 cm -1 range, depending on the Zr concentration, which can be attributed to the band's broadness [35][36][37]. The change that appeared to the Ti-O bond indicates that the Ti 4?…”

Section: Ftir Analysismentioning

confidence: 99%

Improvement of ferroelectric properties via Zr doping in barium titanate nanoparticles

Reda

El-Dek

Arman

2022

J Mater Sci: Mater Electron

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Barium titanate is still the prototype of a piezoelectric crystalline material that has attracted many researchers and industrial partners to use. A modified citrate method was used to create barium titanate nanoparticles BaTi1−xZrxO3. The samples were crystallized in a single-phase tetragonal structure, as revealed using X-ray powder diffraction. The crystallite size decreases with increasing Zr concentration. Fourier-transform infrared spectra showed the main absorption bands of the samples BaTi1−xZrxO3. Field emission scanning electron microscopy micrographs illustrate that the doped sample BaTi0.9Zr0.1O3 is more porous and finer than the parent. For low Zr doping concentrations (x = 0.1), the ferroelectric properties of barium titanate are improved. The conduction mechanisms in the samples are small polaron hopping and correlated barrier hopping. The Zr/Ti ratio is a crucial parameter for tailoring the ferroelectric–paraelectric phase transition.

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Section: Ftir Analysismentioning

confidence: 99%

Improvement of ferroelectric properties via Zr doping in barium titanate nanoparticles

Reda

El-Dek

Arman

2022

J Mater Sci: Mater Electron

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“…For the electronic interaction, nitrogen is good because of electrons can pass for the dopant of the orbitals 2p or 3p to the 3d orbital Ti, and the width of the forbidden band decreases. The photocatalytic activity decrease of doped TiO 2 powders in the visible region, especially in the polluted environment is an urgent problem to solve [10][11][12][13][14][15][16][17].…”

Section: Methods Of Preparation and Properties Of Composites With Tio...mentioning

confidence: 99%

Synthesis, Structure and Biomedical Application of Nanosize Composites Based on Oxide Semiconductor and Metal (Review)

2021

Nanosistemi, Nanomateriali, Nanotehnologii

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Today, nanocomposites based on magnetite (Fe 3 O 4 ), zinc oxide (ZnO), titanium oxide (TiO 2 ) doped with metal cations are widely used to create new kinds of biocompatible materials, which are characterized by unique complexes of physical-chemical properties. The semiconducting-nanoparticles' coating by metals leads to their stabilization in corrosive biological media and affects their electrical, magnetic, catalytic, and plasmonic properties too. The achievements during recent years in the field of producing composites based on nanosize particles of different nature are demonstrated in a given review article. The basic methods for materials' preparation, properties, and the possible fields of their application are summarized.Сьогодні нанокомпозити на основі магнетиту (Fe 3 O 4 ), оксиду Цинку (ZnO), оксиду Титану (TiO 2 ), леґованих катіонами металів, широко використовуються для створення нових видів біосумісних матеріялів, що характеризуються унікальними комплексами фізико-хемічних властивостей. Покриття напівпровідникових наночастинок металами приводить до стабілізації їх у корозійних біологічних середовищах і впливає також на їхні електричні, магнетні, каталітичні та плазмонні властивості. Досягнення останніх років у галузі виробництва композитів на основі нанорозмірних частинок різної природи продемонстровано в даній оглядовій статті. Підсумовано основні методи підготовки матеріялів, властивості та можливі сфери застосування їх.

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“…Overcoming the problems related to global warming, environmental pollution and energy crisis requires modern technologies based on the catalytic and photocatalytic processes, such as organic and inorganic pollutants degradation, photocatalytic and catalytic CO 2 and N 2 O decomposition, electrochemical-photoelectrochemical evolution of oxygen and hydrogen (Dolat et al 2013;Gaidai et al 2017;Goncharuk et al 2019;Khalyavka et al 2019;Ischenko et al 2008;Linnik et al 2009;Reli et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Photoelectrochemical, photocatalytic and electrocatalytic behavior of titania films modified by nitrogen and platinum species

et al. 2021

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Co-doping of titania by N and Pt species was employed to tune the electronic structure and enhance the electrocatalytic and photocatalytic activity of the films. Herein, the different approaches of synthesis procedure of Pt-and Pt,N-TiO 2 films were used to investigate their effect on the platinum oxidation states. The resulting different species of Pt led to the changes in the electronic structure of TiO 2 , with consequent bandgap narrowing, anodic shift of the flat band potential, and cathodic shift of the valence band The quantum yield efficiency was correlated with Pt 0 atomic content and the relative atomic content of Pt n+ -O-Ti fragments, whereas its decrease for some samples can be caused by the presence of N and Pt n+ . The highest response for N 2 O photocatalytic decomposition was observed over Pt,N-TiO 2 films. The presence of metal and non-metal species in TiO 2 structure resulted in synergistic effect including (1) inhibition of recombination of the electrons and holes and (2) narrowing of the bandgap. Electrocatalytic properties in hydrogen and oxygen evolution reactions were improved by Pt doping. The formed Pt 2+ -O-Ti bonds rather than Pt nanoparticles are suggested to be responsible for the highest electrocatalytic activity. The additional UV exposure of the electrodes led to Pt NPs aggregation as a result of photodeposition of Pt ions. The mechanism of the Pt 2+ photoreduction in TiO 2 structure is proposed.

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Cerium-doped mesoporous BaTiO3/TiO2 nanocomposites: structural, optical and photocatalytic properties

Cited by 14 publications

References 33 publications

Improvement of ferroelectric properties via Zr doping in barium titanate nanoparticles

Improvement of ferroelectric properties via Zr doping in barium titanate nanoparticles

Synthesis, Structure and Biomedical Application of Nanosize Composites Based on Oxide Semiconductor and Metal (Review)

Photoelectrochemical, photocatalytic and electrocatalytic behavior of titania films modified by nitrogen and platinum species

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