Titanate
Mostrando 1-12 de 75 artigos, teses e dissertações.
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1. Study of structural, optical, and morphological characteristics of manganese titanate (MnTiO3) obtained by combustion reaction using microwave energy
Abstract MnTiO3 is a semiconductor that has relevant dielectric and optical properties. For the synthesis of manganese titanate (MnTiO3) powders, the combustion method via microwave and subsequent calcination at 500, 700, and 900 °C were used. The structural, morphological, and optical properties of the samples were investigated. X-ray diffraction analyzes
Cerâmica. Publicado em: 2021-03
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2. ANODES FOR SOFC: REVIEW OF MATERIAL SELECTION, INTERFACE AND ELECTROCHEMICAL PHENOMENA
This paper presents a comprehensive interface and electrochemical phenomena review of different anodes for SOFC. In this way, it was possible to select some mixed electronic and ionic conductor materials alternatives to the conventional anode, Ni-YSZ conductor. New materials must present a satisfactory electronic and ionic conductivity at intermediate temper
Quím. Nova. Publicado em: 2021-01
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3. Characterization of TiO2 Nanoparticle’s Morphology and its Influence on the Hydrogen Sorption Kinetics of MgH2
TiO2 nanorods present good performance as catalysts in the sorption behavior of magnesium hydride. In the present study, the morphology of TiO2 nanorods produced from titanate nanotubes heat-treated at 550 °C (NR550), 650 °C (NR650) and 750 °C (NR750) was characterized and their catalytic role on the sorption kinetics of MgH2 was evaluated. For this, ball
Mat. Res.. Publicado em: 20/12/2019
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4. Hydrogen production from aqueous glycerol using titanate nanotubes decorated with Au nanoparticles as photocatalysts
Abstract: Protonated titanate nanotubes (HTiNts) were synthesized using the hydrothermal method, followed by proton exchange with acid. Gold nanoparticles decorated titanate nanotubes (AuHTiNts) were obtained by the reduction of AuCl4- under vigorous stirring with an aqueous solution of HTiNts containing 1 wt% of ascorbic acid. To investigate the surface str
An. Acad. Bras. Ciênc.. Publicado em: 28/11/2019
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5. Utilização de casca de ovo como fonte alternativa de cálcio na obtenção de titanato de cálcio (CaTiO3)
RESUMO No presente trabalho, detalha-se o estudo do reaproveitamento da casca de ovo como fonte alternativa mineral de calcita na síntese de titanato de cálcio (CaTiO3). As matérias-primas foram caracterizadas por difração e fluorescência de raios X e as composições foram formuladas e sinterizadas em diferentes condições. Após a sinterização, as
Matéria (Rio J.). Publicado em: 25/11/2019
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6. Effect of stem cells combined with a polymer/ceramic membrane on osteoporotic bone repair
Abstract Cell therapy associated with guided bone regeneration (GBR) can be used to treat bone defects under challenging conditions such as osteoporosis. This study aimed to evaluate the effect of mesenchymal stem cells (MSCs) in combination with a poly(vinylidene-trifluoroethylene)/barium titanate (PVDF-TrFE/BT) membrane on bone repair in osteoporotic rats.
Braz. oral res.. Publicado em: 09/09/2019
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7. Biomimetic Coating of Mechanochemically Synthesized Zirconium Titanate
A biomimetic method was used to promote bioactivity of ZrTiO4. Zirconium titanate was obtained by using a combination of techniques such as mechanical milling and heat treatment of zirconia and titania powders. The effect of milling time on the evolution of the ZrTiO4 phase formation was studied. Powders were uniaxially pressed followed by heat treatment for
Mat. Res.. Publicado em: 10/07/2019
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8. Dielectric and Raman spectroscopy studies of (Na0.5Bi0.5)TiO3 lead-free ceramic
Resumo Neste estudo, amostras de titanato de bismuto e sódio (Na0,5Bi0,5)TiO3 (NBT) foram preparadas usando a técnica de estado sólido. A sinterização foi feita a 1200 ºC por 4 h ao ar. A análise de difração de raios X realizada à temperatura ambiente mostrou a formação de um composto de fase única com um sistema cristalino romboédrico. Caracte
Cerâmica. Publicado em: 06/06/2019
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9. Photoelectrodes with titanate nanotubes sensitized by mesoporphyrin derivative from cashew nut shell
ABSTRACT Titanate nanotubes (TiNTs) with the chemical composition Na2Ti3O7.nH2O (NaTiNT) were obtained through a hydrothermal method in highly alkaline medium. Protonated titanates nanotubes (H-TiNTs), with the composition H2Ti3O7.nH2O, were prepared by ion exchange reaction through a suspension of Na2Ti3OγnH2O nanotubes in HCl medium, promoting the exchang
Matéria (Rio J.). Publicado em: 20/05/2019
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10. Efectos de tratamientos térmicos post-alcalinos sobre las propiedades superficiales de titanio para implantes dentales con diferentes recubrimientos
ABSTRACT Titanium is widely used as dental implant since it is bio-inert and osseointegratable. However, provided that this material cannot induce bone growth from its surface, it is usual to carry out different surface treatments in order to develop bioactive coatings that increase both the initial rate of bone development and the biological anchorage of im
Matéria (Rio J.). Publicado em: 19/07/2018
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11. Performance Evaluation of Titanate Nanotubes and Nanoribbons Deposited by Electrophoresis in Photoelectrodes of Dye-Sensitized Solar Cells
Nanoparticles of TiO2 have been the main semiconductor applied in Dye-sensitized solar cells (DSSCs). In this work, titanate nanotubes (NaTiNT) and nanoribbons, were obtained by the hydrothermal method from TiO2 anatase. These materials were deposited on conductive substrate by electrophoresis, with and without thermal treatment, sensitized by ruthenium-base
Mat. Res.. Publicado em: 28/05/2018
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12. Titanate Nanotubes as New Nanostrutured Catalyst for Depolymerization of PET by Glycolysis Reaction
The final destination of PET packaging is creating economic and environmental concerns. One of the alternatives to minimize this problem would be making use of chemical recycling of this material through glycolysis with the aim to produce bis(hydroxiethyl) terephthalate, BHET monomer. This reaction is well known, but it still presents problems as BHET purity
Mat. Res.. Publicado em: 06/11/2017