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123 results for “TiO2”
Enhancement of carbamazepine photodegradation using hybrid of phosphorescent carbon dots coupled with highly porous TiO2 photocatalyst
<p>Data used for creation of the Figures for publication</p>
Titanium dioxide (TiO2) thin films study, deposited by laser ablation on glass substrates in the form of prismatic figures type pyramidal
<p>Thin films are something that is very close to the atomic dimensions in thickness, therefore if it is possible to further reduce the width of these, in a controlled way and monitor the behavior of some physical law associated with the variation in thickness, the results can be as expected or maybe adjustments must be applied. For this reason in this work, thin films of titanium dioxide (TiO2) are studied, deposited by laser ablation, on glass substrates in the form of prismatic figures. The main objective was to confine the plasma plume to produce a continuous trail with varying thicknesses that could be analyzed. Growth times of the films were 5, 10, 15, 20 and 30 minutes at room temperature in a low vacuum. The deposited films presented a color pattern related to the expected thickness variation, thus the theory of optical interference was applied to the continuous trace to calculate thicknesses. Characterization process was carried out by: X-ray diffraction to know the crystalline structure of the films, ultraviolet-visible spectroscopy to verify the variation of thicknesses, X-ray photoelectron spectroscopy to know the composition and scanning electron microscopy, to measure the thicknesses of the films transversely.</p>
Data from: Effect of Hf-doping on electrochemical performance of anatase TiO2 as an anode material for lithium storage
Hafnium-doped titania (Hf/Ti = 0.01; 0.03; 0.05) had been facilely synthesized via a template sol-gel method on carbon fiber. Physicochemical properties of the as-synthesized materials were characterized by X-ray diffraction, Raman spectroscopy, scanning electron microscopy, energy-dispersive X-ray analysis, scanning transmission electron microscopy, X-ray photoelectron spectroscopy, thermogravimetry analysis, and Brunauer−Emmett−Teller measurements. It was confirmed that Hf4+ substitute in the Ti4+ sites, forming Ti1–xHfxO2 (x = 0.01; 0.03; 0.05) solid solutions with an anatase crystal structure. The Ti1–xHfxO2 materials are hollow microtubes (length of 10–100 μm, outer diameter of 1–5 μm) composed of nanoparticles (average size of 15–20 nm) with surface area of 80–90 m2 g–1 and pore volume of 0.294–0.372 cm3 g–1. The effect of hafnium ions incorporation on electrochemical behavior of anatase TiO2 as Li-ion battery anode was investigated by galvanostatic charge/discharge and electrochemical impedance spectroscopy. It was established that Ti0.95Hf0.05O2 shows significantly higher reversibility (154.2 mAh g–1) after 35-fold cycling at C/10 rate in comparison with undoped titania (55.9 mAh g–1). The better performance offered by Hf4+ substitution of the Ti4+ into anatase TiO2 mainly results from more open crystal structure, which has been achieved via the difference in ionic radius values of Ti4+ (0.604 Å) and Hf4+ (0.71 Å). The obtained results are in a strong accordance with ones for anatase TiO2 doped via Zr4+ (0.72 Å) published earlier. Furthermore, improved electrical conductivity of Hf-doped anatase TiO2 materials due to charge redistribution in the lattice and enhanced interfacial lithium storage due to increased surface area directly depending on Hf/Ti atomic ratio have beneficial effect on electrochemical properties.
Figure 2 from: Novak S, Drobne D, menard a (2012) Prolonged feeding of terrestrial isopod (Porcellio scaber, Isopoda, Crustacea) on TiO2 nanoparicles. Absence of toxic effect. ZooKeys 176: 261-273. https://doi.org/10.3897/zookeys.176.2463
Figure 2 - Daily feeding rate (mg of consumed leaves/animal weight) of animals fed on control (untreated) leaves and leaves dosed with 1000 or 2000 µg/g nano-TiO2 for 3, 7, 14 or 28 days. On x scale also number of animals in each group is represented (n). There are statistically significant differences between animals exposed to food dosed with 1000 µg/g nano-TiO2 for 3 and 14 days compare to control of the corresponding group and between control and 2000 µg/g nano-TiO2 in animals exposed for 14 days (* p < 0.05). Symbols on the box plot represent minimum and maximum data values (whiskers), mean value (□), 75th percentile (upper edge of box), 25th percentile (lower edge of box), median (line in box) and max and min value ( - ).
Figure 3 from: Novak S, Drobne D, menard a (2012) Prolonged feeding of terrestrial isopod (Porcellio scaber, Isopoda, Crustacea) on TiO2 nanoparicles. Absence of toxic effect. ZooKeys 176: 261-273. https://doi.org/10.3897/zookeys.176.2463
Figure 3 - Percentage of animals in fed on food dosed with 1000 or 2000 µg/g nano-TiO2 for 3, 7, 14 or 28 days with different degrees of destabilization of cell membranes, assessed visually and classified from 0 to 6 according to the scale defined in Materials and Methods, above. On x scale also number of animals in each group is represented (n). Digestive gland cell membrane stability values ≤ 2 represent animals which had no destabilized cell membrane and digestive gland cell membrane stability values 3 or 4 animals with destabilized cell membranes. Those with value 5 or 6 had the most destabilized cell membranes. Statistical differences between exposed and control animals (within one exposure duration) are marked with an asterisk (* p < 0.05 and ** p < 0.01).
Figure 1a- b from: Novak S, Drobne D, menard a (2012) Prolonged feeding of terrestrial isopod (Porcellio scaber, Isopoda, Crustacea) on TiO2 nanoparicles. Absence of toxic effect. ZooKeys 176: 261-273. https://doi.org/10.3897/zookeys.176.2463
Figure 1a- b - TiO2 nanoparticles dispersed over the abaxial leaf surface to give final concentration of 1000 µg/g dry wt of leaf a EDX spectrum of area encircled on Figure 1a, where presence of Ti is confirmed b.
For METADATA evaulation: SEM image of TiO2 particles from UNITO trials
InLens detector (surface sensitive, see 'Signal A= InLens') a
Data from: Photocatalytic Inactivation of E. coli under UV Light Irradiation using Large Surface Area Anatase TiO2 Quantum Dots
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Data from: TiO2 thin films by ultrasonic spray pyrolysis as photocatalytic material for air purification
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Data from: Preparation of pod-shaped TiO2 and Ag@TiO2 nano burst tubes and their photocatalytic activity
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Data from: Micro/nano-hierarchical structured TiO2 coating on titanium by micro-arc oxidation enhances osteoblast adhesion and differentiation
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Data from: Effect of Hf-doping on electrochemical performance of anatase TiO2 as an anode material for lithium storage
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Data from: Electrospinning preparation of oxygen-deficient nano TiO2-x/carbon fibre membrane as a self-standing high performance anode for Li-ion batteries
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Data from: Photocatalytic activity of graphene oxide–TiO2 thin films sensitized by natural dyes extracted from Bactris guineensis
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Titanium dioxide (TiO2) thin films study, deposited by laser ablation on glass substrates in the form of prismatic figures type pyramidal
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Data from: Irradiation-catalyzed degradation of methyl orange using BaF2-TiO2 nanocomposite catalysts prepared by a sol–gel method
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Mechanisms of (photo)toxicity of TiO2 nanomaterials (NM103, NM104, NM105): using high-throughput gene expression in Enchytraeus crypticus
GEO Series GSE81699. Enchytraeus crypticus. 30 samples. Type: Expression profiling by array.
Gene expression profiles in human keratinocytes exposure to ultrafine, fine, and submicron TiO2 particles
GEO Series GSE16425. Homo sapiens. 12 samples. Type: Expression profiling by array.
Combined effects of ZnO and TiO2 nanoparticles on functional gene expression of Nitrosomonas europaea
GEO Series GSE70121. Nitrosomonas europaea ATCC 19718; Nitrosomonas europaea. 12 samples. Type: Expression profiling by array.
Nanotoxicogenomic study of ZnO and TiO2 responses (Illumina)
GEO Series GSE39316. Homo sapiens. 90 samples. Type: Expression profiling by array.
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