Naofumi Uekawa
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View article: Preparation of porous titania particles via hot water or hydrothermal treatment of porous hydrous titania and their photocatalytic ability
Preparation of porous titania particles via hot water or hydrothermal treatment of porous hydrous titania and their photocatalytic ability Open
The synthesis of porous titania microparticles with high specific surface area and sufficient photocatalytic activity is an important but challenging task. To this aim, micron-sized porous titania particles exhibiting photocatalytic activi…
View article: Quenching effect of cerium oxide nanoparticles on singlet oxygen: validation of the potential for reaction with multiple reactive oxygen species
Quenching effect of cerium oxide nanoparticles on singlet oxygen: validation of the potential for reaction with multiple reactive oxygen species Open
Here we studied cerium oxide nanoparticles (nanoceria) as an agent for the future treatment of oxidative damage by validating and evaluating its scavenging activity towards reactive oxygen species (ROS) in vitro. Nanoceria has been …
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Atmospheric non-equilibrium planar plasma under magnetic field to form a porous-TiO 2 layer for dye-sensitized solar cells" Vol.130, No. 3, p. 249-256 Cover presents photographs of an electrode to induce a planar plasma; (a) a hand-made el…
View article: Preparation of flower-like titania particles from lithium titanate hydrate via acid treatment and hydrothermal crystallization
Preparation of flower-like titania particles from lithium titanate hydrate via acid treatment and hydrothermal crystallization Open
Micron-sized flower-like particles with plate-like titania petals were prepared by acid and posthydrothermal treatment of flower-like lithium titanate hydrate (LTH). Hydrolysis of titanium alkoxide and ethanol washing were used to create p…
View article: Photochromic property of cerium oxide nanoparticles prepared by dialysis of solution of cerium nitrate
Photochromic property of cerium oxide nanoparticles prepared by dialysis of solution of cerium nitrate Open
CeO2 nanoparticles were obtained by heating 50 mL of 0.1 M Ce(NO3) 3·6H2O solution mixed with 5 mL of 1 M NH3 aq. at 368 K for 24 h. When H2O and ethanol were used as solvents for cerium nitrate hydrate, obtained CeO2 nanoparticles were ag…
View article: Low-temperature synthesis of strontium titanate particles with high specific surface area
Low-temperature synthesis of strontium titanate particles with high specific surface area Open
Strontium titanate (SrTiO3) particles are expected to be applied to various catalysts, and many kinds of synthesis procedures of SrTiO3 particles with a high specific surface area have been proposed. This study investigates a synthesis pro…
View article: Preparation of porous titania particles by partial dissolution and heat treatment of hydrous titania
Preparation of porous titania particles by partial dissolution and heat treatment of hydrous titania Open
Porous titania particles were prepared by partial dissolution of hydrous titania and subsequent heat treatment. Uniform and spherical particles of hydrous titania were prepared by hydrolysis of titanium alkoxide at different hydrolysis con…
View article: Titanium oxide thin film preparation with sol coatings of plate and spindle-shaped nanoparticles for control of optical transmittance
Titanium oxide thin film preparation with sol coatings of plate and spindle-shaped nanoparticles for control of optical transmittance Open
A layered titanate sol was prepared at room temperature (298 K) using dialysis of a mixed solution of ethylene glycol solution of TiCl3, ammonium carbonate aqueous solution, and hydrogen peroxide. A sol with dispersion of plate-shaped laye…
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View article: Synthesis of Stable Sols of Layered Titanate Nanoparticles using Dialysis and Applications for Thin Film Preparation
Synthesis of Stable Sols of Layered Titanate Nanoparticles using Dialysis and Applications for Thin Film Preparation Open
Sols with stable dispersion of layered titanate nanoparticles were prepared at 298 K using dialysis of a mixed solution of ethylene glycol, TiCl3, ammonium carbonate, and H2O2. Raman spectra of the particles in the obtained sols showed Ram…
View article: Synthesis of copper ion doped ZnS phosphor sols by peptization process of sulfide-citrate complex precipitates
Synthesis of copper ion doped ZnS phosphor sols by peptization process of sulfide-citrate complex precipitates Open
Optically transparent and stable sols of copper ion doped zinc sulfide (ZnS:Cu) nanoparticles were obtained by heating a mixture of ethylene glycol aqueous solution and sulfide precipitate at 348 K for 24 h. The sulfide precipitates contai…