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Showing 1 to 20 of 24 for “"anatase TiO2"”.
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Computational study of low index surface of an anatase TiO2 doped with ruthenium (Ru) and strontium (sr) for application in Dye sensitized solar cells
Titanium dioxide (TiO2) is considered to be an ideal semiconductor for photocatalysis because of its high stability, low cost and safety towards both humans and the environment. Doping TiO2 with different elements has attracted much attention as the most important way of enhancing the visible light …
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Structure-Sensitivity of CO Oxidation Over Supported Pt Catalysts in the Subnanometer Regime and Its Origin
… with the size of Pt particles supported on anatase TiO2 and CeO2 and its origin. We varied the Pt nuclearity from single-atoms to subnanometer clusters (0.8-0.9 nm) to small nanoparticles (1.5-1.8 nm). By coupling density functional theory calculations and microkinetic modeling with kinetic …
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On the phase transition and photo-reactivity on the micro-sized titanium dioxide single crystal.
Titanium Dioxide (TiO2) has been extensively studied across various fields including photocatalysis, electrochemistry, optics, etc. Studying the micro-sized TiO2 single crystals could bridge the gap between the nano-sized crystal TiO2 results and theoretical studies on their bulk crystals and …
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Nanoparticle and Sol -Gel Inks for Direct -Write Assembly of Functional Metallic and Metal Oxide Materials
The ability to pattern 1D arrays of TiO2 microwires offers precise control of filament diameter and spatial location, enabling a systematic study of microwire TiO2 gas sensors. A model gas sensor consisting of a single layer of parallel microwires is printed with the TiO2-based sol-gel ink in a …
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Integrated Tandem Dye Sensitized Solar Cell (DSSC)-Lithium Ion Battery
… uses a common anode (titanium foil coated with anatase TiO2 on both sides which serves as DSSC and lithium ion battery anode) which showed an open-circuit voltage of ~3 V, a short circuit current density of ~40mAhg-1 and a storage efficiency of ~0.80%. This new device can serve as power source …
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Design of band-engineered photocatalysts using TiO2
… of methylene blue photooxidation over thin-film anatase TiO2 grown by atomic layer deposition. The near-surface electric field was controlled by tuning the space charge layer width through varying the bulk carrier concentration and the surface potential. The carrier concentration in the …
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Density functional theory study of adsorption of cronconate dyes on TiO2 Anatase (010) and (100) surfaces
… of solar cells use the dye molecule adsorbed on TiO2 semiconductor in Nano architecture with the role of absorbing photons, in recent research attempts are being made to shifts the absorption spectral of TiO2 to visible and near infrared–region of solar spectrum to achieve maximum photo …
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Improved catalysts with properties controlled by semiconductor band engineering
… lab allows variation of thin polycrystalline anatase TiO2 film thickness that provides an unconventional means of varying carrier concentration. The film thickness has an inverse relationship with its carrier concentration, as an increase in film thickness reduces the concentration of …
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Correlation of Photocatalytic Activity with Band Structure of Low-dimensional Semiconductor Nanostructures
… the photocatalytic activity of one-dimensional anatase TiO2 nanobelts. Given that the oxygen vacancy plays a significant role in band structure and photocatalytic performance of semiconductors, oxygen vacancies were introduced into the anatase TiO2 nanobelts during reduction in H2 at high …
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TiO2-doped Ionic Polymer-Metal Composite Actuator
… and electromechanical properties of TiO2-doped ionic polymer membrane and IPMCs prepared by the sol-gel preparation. The structures of fabricated samples were investigated by Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD), and Differential Scanning Calorimetry (DSC). …
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Layer-by-layer assembled carbon nanotube nanostructures for high-power and high-energy lithium storage
… the LbL process, we next prepare titanium oxide (TiO2)-MWNT thin films using electrostatic interactions between positively charged anatase TiO2 nanoparticles and negatively charged functionalized MWNTs. MWNT-TiO2 film growth and quality are investigated in terms of film thickness and roughness as …
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Enhancing light-matter interactions in oxide semiconductors
… portion of visible light spectrum by combining anatase TiO2 with anomalously high light-absorbing metallic oxides. I show the evolution of photocurrent in such heterojunction devices that originates from hot carriers transported across TiO2 simply by diffusion and drift, and its practical …
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Exploiting polar interfaces for photocatalytic water splitting: application to the anatase-cuprous oxide heterojunction
… surface polarity compensation mechanisms in the anatase (TiO2) / cuprous oxide (Cu2O) heterojunction, a system which has recently been realized in experiment. Due to its low valence band edge, anatase has a good oxidation potential; by contrast cuprous oxide has a good reduction potential due to …
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Investigation of physical properties of mesoporous NANO-Ti02 for dye-solar
… on a wide band gap «3.0-3.2eV» semiconductor TiO2 in its nano-scaled form. These nano-sized TiO2 are sensitized by a dye monolayer so to increase its spectral response and are immersed in a redox electrolyte for charge transfer. At the present moment, the best overall sunlight to electrical …
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Hubbard-corrected density functional theory : sensitivity to projection-space and renormalization of Coulomb interaction.
… this projection-size dependence using rutile and anatase TiO2 as representative model systems. By varying the muffin-tin radius over a physically relevant range, we demonstrate that conventional DFT+U calculations with a fixed Hubbard parameter yield inconsistent structural, electronic, and …
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New strategies for application of defect engineering to TiO2 based photocatalytic materials
… related to defect engineering. Specifically, TiO2 has already demonstrated promise as a catalytic material for environmental remediation by photocatalysis in aqueous media as well as water splitting for hydrogen fuel production by photo/electrocatalysis. There remain a number of major hurdles …
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Raman, Infrared, X-ray, and EELS Studies of Nanophase Titania
… phases investigated were amorphous titania, anatase TiO2, and rutile TiO2. Annealing-induced phase transformations from amorphous TiO2 to anatase to rutile were studied by Raman scattering, infrared reflectivity, infrared absorption, x-ray diffraction, and electron energy-loss spectroscopy …
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Template-Directed Synthesis of One-Dimensional Hybrid Nanostructures from Cylindrical Polymer Brushes
… for the fabrication of titania dioxide (TiO2) semiconductor nanotubes. The cationic PDMAEMA shell was loaded with a negatively charged titania precursor, namely titanium(IV) bis(ammonium lactate) dihydroxide (TALH). TALH underwent hydrolysis within the CPB shell upon heating above 70 °C. …
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Atomic-level Insights Into Atomically Dispersed Metal Catalysts
… nature of the Ir single atoms supported on anatase TiO2 (Ir1/TiO2) for CO oxidation is studied systematically (Chapter 2). The local configuration of the Ir1/TiO2 catalysts during the reduction in CO(g) and the reaction in CO(g) and O2(g) is elucidated. Based on the elucidated structures, we …
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