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Showing 1 to 20 of 41 for “"TiO2 nanoparticles"”.
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Morphology and polymorphism of TiO2 nanoparticles prepared in premixed stagnation flames
… the morphology and polymorphism of TiO$_2$ nanoparticles prepared in premixed stagnation flames in order to understand the factors controlling the formation of the particles. Computational models are developed and experimental measurements are performed to characterise the effect of varying …
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Magnetic seeding aggregation to enhance the removal efficiency of TiO2 nanoparticles from water
Engineered nanoparticles, such as titanium dioxide (TiO_2), are important building blocks for the evolution of nanotechnology in industries and commercial products. Ever so increasing use of the engineered nanoparticles is bound to result in a substantial fraction of these nanoparticles ending up …
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Observing the Sedimentation of TiO2 Nanoparticles in Aqueous Solution Using a Quartz Crystal Microbalance with Dissipation Monitoring
The development of a novel and less expensive approach to the quartz crystal microbalance with dissipation monitoring (QCM-D) is explored. Using a vector network analyzer (VNA) to measure harmonic ranges from the primary to the 89th harmonic of a 5 MHz crystal. The fast read and processing ability …
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Titania-silica composite materials for self-cleaning applications on monumental stones
… for the Doctoral Thesis presented, mesoporous TiO2-SiO2 composites that have photocatalytic activity have been synthesized by mixing ethoxysilane oligomers and TiO2 nanoparticles in the presence of a non-ionic surfactant (noctylamine). The products synthesized have a clear practical application …
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Fundamental Understanding of NOx Sequestration Capacity And Pathways in Nano-TiO2 Engineered Cementitious Materials
… interest in the incorporation of titania (TiO2) nanoparticles into cementitious materials. Air purification by TiO2-based cementitious materials occurs by photocatalysts that capture nitrogen oxide species (NOx) from the atmosphere, then oxidizing them into nitrite and nitrate species. …
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Decoration of graphene sheets with metal and metal oxide nanostructures by low-pressure plasma deposition
… interface between the graphene sheets and Nb2O5 nanoparticles were studied. It was established that the structural defects were pronounced with increasing amounts of the Nb2O5 concentration. XPS measurement on graphene/Nb2O5 suggests p-type doping of graphene due to charge transfer at the …
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Advanced oxidative water treatment process using an electrohydraulic discharge reactor and TiO2 immobilised on nanofibres
… in such a way that the synthetic immobilized TiO2 nanophotocatalytic components could be integrated, for the production of active species such as OH radicals, ozone and hydrogen peroxide, as a cocktail to clean drinking water without the addition of chemicals. The research objectives include: …
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Characterization of Hydrophobically Modified Titanium Dioxide Polylactic Acid Nanocomposite Films for Food Packaging Applications
Titanium dioxide (TiO2) polymer nanocomposites improve barrier properties to gas and moisture and mechanical strength as well as providing active packaging functions. However, low compatibility between hydrophilic TiO2 nanoparticles and hydrophobic polymers such as polylactic acid (PLA) causes …
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Investigation on nanostructured solar cells
… synthesized and their effects were investigated. TiO2 nanoparticles, which are commonly used in the nanostructured solar cells, were synthesized by a newly developed technique, combining the advantages of flame aerosol synthesis and flow-limited field-injection electrostatic spraying (FFESS). The …
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Effect of nanoparticles on human cells from healthy individuals and patients with respiratory diseases.
… effects. Zinc oxide (ZnO) and titanium dioxide (TiO2) are widely used in a number of commercial products. There are published studies indicating that some forms of these compounds may be photo-clastogenic in mammalian cells. What has not been investigated before is the effect of nanoparticles …
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Laccase-based Biocatalytic Systems for Recalcitrant Micro-Pollutants Degradation and Energy Generation
… hybrid membrane system where laccase-immobilized TiO2 nanoparticles were suspended in the feed solution, and the biocatalytic membrane reactor where laccase was immobilised on TiO2 coated membrane surface. Using p-coumaric acid as a mediator, efficient CBZ removal (up to 71%) was achieved with the …
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Photoinduced wetting kinetics of water on immersed nanoporous titania surfaces with application to oil-water separation
… nanoporous surfaces were prepared by depositing TiO2 nanoparticles onto flat substrates using Layer-by-Layer (LBL) assembly, and were then impregnated with oil to simulate typical fouling conditions experienced in oil-water separation applications. The resulting hydrophobic surfaces were …
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Synthesis and characterization of nanostructured catalysts for photovoltaic applications
… effect of the morphology of titanium dioxide (TiO2) nanoparticles on the electron transport properties and light harvesting potential in a dye sensitized solar cell (DSSC). Particular attention was given to develop synthetic methods to produce metal oxide photocatalysts with similar crystallite …
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The synthesis, characterization, and application of carborane-cluster based macrocycles and boron nitride nanosheets in photovoltaics
… a working photovoltaic device when attached to TiO2 nanoparticles as a semiconductor in a manner similar to a DSSC. This paper explores the characterizations of a new polythiophene-BNNS complex, as well as attempting to stabilize and functionalize BNNS with thiophene based monomers.</p>
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Charge Transfer Dynamics in Cadmium Chalcogenide Quantum Dots based Heterostructures
… band edge states. Mesoporous titanium oxide (TiO2) is often used as the electron extracting component in dyesensitized and QDs based solar cells. CdSe QDs were assembled on TiO2 nanoparticles (NPs) using linker assisted assembly (LAA) approach and electron transfer was studied from band edge …
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Study of Semiconducting Nanomaterials: Photoelectrochemistry and Dynamic Light Scattering
… studies of bare and sensitized titanium dioxide (TiO2) nanoparticles (NPs). A detailed study of NP colloidal behavior has been described with respect to dynamic light scattering (DLS) measurements. In our system, we studied electron transfer across the semiconductor (SC) electrode and electrolyte …
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Subwavelength nanostructures for optical biosensing and rapid photochemical reactions
… for localized surface plasmon resonance metallic nanoparticles. Nanostructured substrates made of Si and Si3N4 have been characterized and compared. Schemes of enhancing the optical signal extraction are also discussed. We show the potential of dielectric based nanostructure substrate for …
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Effect of Dispersion on Rheology and 3D Printing of Chitosan-Graphene-Titanium Dioxide Composites
… a chitosan-graphene-titanium dioxide (CS-G-TiO2) polymer composite ink composed of TiO2 nanoparticles (1 wt.% to 25 wt.%), graphene (1 wt.%), and chitosan (5 wt.% to 9 wt.%) to evaluate the effect of ultrasonication techniques (bath vs. probe) on aggregate size. Probe-sonicated dispersions …
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The adsorption of bidens pilosa dye molecules onto TiO2 nanoparicle surfaces for optimization of light harvesting efficiency in dye sensitized solor cell: an experimental and theory study
… current study describes the green synthesis of TiO2 nanoparticles as well as their characterization using ultraviolet-visible, Fourier transformed infrared spectroscopy and X-ray diffraction. Furthermore, the study used Density Functional Theory to describe the optical characteristics of …
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