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Showing 1 to 20 of 277 for “"Titanium dioxide."”.
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Absorption of Dietary Titanium Dioxide
Food grade Titanium dioxide (fgTiO2) is used as a colouring additive in the food industry, and it is present in food, capsules, and toothpaste. We are exposed to a median of 2.5 mg fgTiO2 per day in the UK through such sources. These are persistent micro and nanoparticles that have been reported in …
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Intestinal Handling of Food Grade Titanium Dioxide
Food grade titanium dioxide (fgTiO2) is a biologically persistent microparticle with an average diameter of 130 nm. It is an additive in the human diet and an excipient in some capsules, tablets, and toothpastes with a median intake of ~2.5 mg per person per day in the UK. Its impact, if any, is …
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Synthesis and properties of nanoparticulate titanium dioxide compounds
… orientated relative to the plain of a pure titanium metal sheet. A non-aqueous solution of ethylene glycol containing small percentage of ammonium fluoride was used as the electrolyte with an applied voltage of 60 V. The morphology and dimensions of the nanotube arrays were studied by …
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Synthesis, Processing And Characterization Of Nanocrystalline Titanium Dioxide
Titanium dioxide (TiO2), one of the basic ceramic materials, has found a variety of applications in industry and in our daily life. It has been shown that particle size reduction in this system, especially to nano regime, has the great potential to offer remarkable improvement in physical, …
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The deposition of silica on titanium dioxide surfaces
… silicate solution to an aqueous dispersion of titanium dioxide, has been investigated by performing a series of controlled preparations and using the technique of microelectrophoresis. Prepared silica-coated rutile samples ranging from partial to full silica coatings have been characterized …
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Quantification of titanium dioxide nanoparticles in environmental matricies.
… (H₂SO₄) digestion and ICP-MS quantification for titanium dioxide (TiO₂) was validated for 4 environmentally relevant matrices. The method provided Ti recoveries of 97 ± 2.5%, 91 ± 4.0%, 94 ± 1.8%, and 73 ± 2.6% (mean ± standard deviation) from water, fish tissue, periphyton, and sediment, …
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Photoactivity of titanium dioxide films with controlled orientation
… commercially. The most common photocatalyst is titanium dioxide, and while the activity of titanium dioxide is high when compared to other photocatalysts, improvements need to be made before commercialization. Increasing the activity of TiO2 can be done in a variety of methods, but this …
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New mechanisms for defect engineering in titanium dioxide
… new mechanisms for defect engineering in titanium dioxide based on surface-bulk coupling, photo-stimulation, and interaction of charged defects at the surface. While titanium dioxide is utilized as a model, the principles observed for titanium dioxide will translate well into other metal …
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Quantum Yields And Mechanism In Titanium Dioxide Mediated Photocatalysis
The photocatalytic pathway in TiO{dollar}sb2{dollar} suspensions was examined using a spin trap/EPR technique within a competition kinetic scheme. Experimental results from competition reactions indicate that there is a marked difference in kinetic behaviours between the systems with …
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Development of titanium dioxide nanoparticles/nanosolution for photocatalytic activity
… ways to overcome this problem is by using titanium dioxide (TiO2). TiO2 is a well-known photocatalyst that widely used for environmental clean-up due to its ability to decompose organic pollutant and kill bacteria. Although it is proven TiO2 has an advantage to solve this concern, its …
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Investigations into leakage current variation in titanium dioxide dielectrics
<p>"Initial study of leakage currents in TiO₂ showed that the leakage current varies and can increase significantly with time. The increase is considered a degradation of the material if it is to be used as a dielectric. Because of this, a more complete study of single crystal and polycrystalline …
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Electronic band engineering: Titanium dioxide particulate layers for photocatalysis
Titanium dioxide (TiO2) is a wide bandgap semiconductor with many application advantages for photocatalysis. However, in the porous films that typify applications, photogenerated charge carriers typically drive reactions inefficiently due to fast recombination. To mitigate this problem, this work …
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Detailed Population Balance Modelling of Titanium Dioxide Nanoparticle Synthesis
… balance model to study the aerosol synthesis of titanium dioxide nanoparticles. It begins by exploring whether the morphological data captured by an existing detailed particle model can be used in a milling model to relate particle morphology and ultimately the particle synthesis conditions to …
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Thermal Analysis of Binding of Organic Pollutants to Titanium Dioxide
… organic compounds. Photocatalytic degradation on titanium dioxide is a possible alternative technique for many classes of these compounds. Several studies have been done by other researchers to study mechanisms of photocatalytic degradation, which occurs either through direct oxidation by holes or …
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Preparation of Copper-Based Oxygen Carrier Supported on Titanium Dioxide
… the supporting material is either directly from titanium(IV) oxide (anatase 99%) or that prepared from other titanium resources such as titanium tetrachloride and tetrabutyl titanate. Preliminary results showed the prepared oxygen carriers functioned properly in the multi-cycles of oxidization …
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Iron-Doped Titanium Dioxide Nanomaterials: Synthesis, Characterization and Photodegradation Catalytic Behavior
Titanium dioxide (TiO2) is a very good material for various photocatalytic industrial applications because of its non-toxicity, high chemical stability, low cost and relatively good photoactivity. However, one of the most serious challenges to its applicability is its wide band gap and because of …
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Titanium dioxide (TiO2) as buffer layer in organic solar cell device
… and ITO. By introducing thin buffer layer of titanium dioxide (TiO2) between ITO and PCBM may improve overall efficiency of the inverted structure OSC because the new suggested interlayer provide efficient pathway for electrons collections. The aim of this research is to fabricate an inverted …
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THE BIO-MOLECULAR ANALYSIS OF TITANIUM DIOXIDE NANOPARTICLES EXPOSURE ON CARDIOMYOCYTES
… H9c2 cardiomyocyte as an <i>in vitro</i> model, titanium dioxide (TiO₂) NPs was applied to understand how TiO₂ NPs can affect the heart. The study identified the localization of TiO₂ NPs in the endoplasmic reticulum (ER). ER stress and elevated oxidative stress was observed. The generation of ER …
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Aspects of the chemistry of titanium dioxide in fused salt solvents
… investigation into the chemistry of solutions of titanium dioxide in fused alkali metal borates has been made, with the emphasis on the ability of the alkali borate melts to dissolve TiO2 and subsequently crystallize TiO2 and/or complex alkali metal titanates. The preparation and properties of …
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