Browsing Exact and Earth Sciences by Subject "Nanotubos"
Now showing items 1-12 of 12
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Application of Taguchi method to study morphological evolution of TiO2 nanotubes obtained via anodization process
(2018) [Journal article]The growth of titanium dioxide nanotubes (TiO2) via anodization process depends on the controlling parameters such as applied potential, anodization time, and electrolyte composition. In the present work, the Taguchi method ... -
Diffusion enhancement in core-softened fluid confined in nanotubes
(2012) [Journal article]We study the effect of confinement in the dynamical behavior of a core-softened fluid. The fluid is modeled as a two length scales potential. This potential in the bulk reproduces the anomalous behavior observed in the ... -
Effect of thermal calcinations on the charge transfer resistance of tantalum nitride nanotubes
(2016) [Journal article]Nanotubes of Ta3N5 were synthesized by thermal Nitridation of Ta2O5 nanotubes under ammonia gas environment. The effect of Nitridation temperature and time was evaluated. Electrochemical impedance spectroscopy was applied ... -
Enhanced flow of core-softened fluids through narrow nanotubes
(2014) [Journal article]We investigate through non-equilibrium molecular dynamic simulations the flow of anomalous fluids inside rigid nanotubes. Our results reveal an anomalous increase of the overall mass flux for nanotubes with sufficiently ... -
Evolution of TiO2 nanotubular morphology obtained in ethylene glycol/glycerol mixture and its photoelectrochemical performance
(2017) [Journal article]The evolution of TiO2 nanotubular morphology, synthesized in a mixture of fluorinated ethylene glycol and glycerol electrolyte, was studied as a function of the anodization time. The samples were characterized by FEG-SEM, ... -
Growth of TiO2 nanotube arrays with simultaneous Au nanoparticles impregnation: photocatalysts for hydrogen production
(2010) [Journal article]Um novo método para a fabricação de nanotubos (NTs) de TiO2 organizados e impregnados com nanopartículas (NPs) de ouro foi desenvolvido, e as propriedades estruturais, morfológicas e ópticas dos NTs obtidos foram investigadas. ... -
Nanotubos de TiO2 dopados com nitrogênio : comparação das atividades fotocatalíticas de materiais obtidos através de diferentes técnicas
(2012) [Journal article]TiO2 nanotubes were synthesized by hydrothermal method and doped with three nitrogen compounds to enhance photocatalytic activity under visible light. Catalysts were characterized by X-ray diffraction (XRD), transmission ... -
Photoelectrochemical study of Ta3N5 nanotubes for water splitting
(2014) [Journal article]Nanotubes (NTs) of Ta3N5 were synthesized by nitridation of Ta2O5 NTs. The samples were studied by scanning electron microscopy, UV-VIS spectrophotometry, x-ray diffraction and photoelectrochemical (PEC) measurements carried ... -
Photosensitised degradation of organic dyes by visible light using riboflavin adsorbed on the surface of TiO2 nanotubes
(2014) [Journal article]A degradação de soluções aquosas de índigo carmim (IC), azul de metileno (MB) e laranja de metilo (MO) assistida pela luz visível foi conseguida sobre a superfície de nanotubos (NTs) de TiO2 impregnados com riboflavina ... -
Síntese, caracterização e atividade fotocatalítica de catalisadores nanoestruturados de TiO2 dopados com metais
(2013) [Journal article]Titanium dioxide nanostructured catalysts (nanotubes) doped with different metals (silver, gold, copper, palladium and zinc) were synthesized by the hydrothermal method in order to promote an increase in their photocatalytic ... -
Structure and mobility of water confined in AlPO4-54 nanotubes
(2017) [Journal article]We performed molecular dynamics simulations of water confined within AlPO4-54 nanotubes. AlPO4-54 is an artificial material made of AlO4 and of PO4 in tetrahedra arranged in a periodic structure forming pores of approximately ... -
The influence of aluminum grain size on alumina nanoporous structure
(2010) [Journal article]An approach to control the interpore distances and nanopore diameters of 150-nm-thick thin aluminum films is reported here. The Al thin films were grown by sputtering on p-type silicon substrate and anodized with a ...