Navegação Ciências Exatas e da Terra por Assunto "Nanotubos"

Resultados 1-12 de 12

    • Application of Taguchi method to study morphological evolution of TiO2 nanotubes obtained via anodization process 

      Bervian, Alexander; Coser, Eliane; Pianaro, Sidnei Antonio; Aguzzoli, Cesar; Pedott, Alexandre Homsi; Khan, Sherdil; Malfatti, Célia de Fraga (2018) [Artigo de periódico]
      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 

      Bordin, José Rafael; Oliveira, Alan Barros de; Diehl, Alexandre; Barbosa, Marcia Cristina Bernardes (2012) [Artigo de periódico]
      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 

      Khan, Sherdil; Severo, Tiago Cassol; Santos, Marcos José Leite; Teixeira, Sergio Ribeiro (2016) [Artigo de periódico]
      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 

      Bordin, José Rafael; Andrade Júnior, José Soares; Diehl, Alexandre; Barbosa, Marcia Cristina Bernardes (2014) [Artigo de periódico]
      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 

      Bervian, Alexander; Coser, Eliane; Khan, Sherdil; Pianaro, Sidnei Antonio; Aguzzoli, Cesar; Marcuzzo, Jossano Saldanha; Baldan, Mauricio Ribeiro; Malfatti, Célia de Fraga (2017) [Artigo de periódico]
      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 

      Feil, Adriano Friedrich; Migowski, Pedro; Scheffer, Francine Ramos; Pierozan, Matheus Daniel; Corsetti, Rodrigo Ruzicki; Rodrigues, Melissa Machado; Pezzi, Rafael Peretti; Machado, Giovanna; Amaral, Livio; Teixeira, Sergio Ribeiro; Weibel, Daniel Eduardo; Dupont, Jairton (2010) [Artigo de periódico]
      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 

      Moro, Celso Camilo; Lansarin, Marla Azario; Bagnara, Mônica (2012) [Artigo de periódico]
      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 

      Khan, Sherdil; Santos, Marcos José Leite; Dupont, Jairton; Teixeira, Sergio Ribeiro (2014) [Artigo de periódico]
      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 

      Backes, Cláudio Cesar Weber; Scheffer, Francine Ramos; Pereira, Marcelo Barbalho; Teixeira, Sergio Ribeiro; Weibel, Daniel Eduardo (2014) [Artigo de periódico]
      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 

      Silva, William Leonardo da; Lansarin, Marla Azario; Moro, Celso Camilo (2013) [Artigo de periódico]
      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 

      Gavazzoni, Cristina; Giovambattista, Nicolas; Netz, Paulo Augusto; Barbosa, Marcia Cristina Bernardes (2017) [Artigo de periódico]
      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 

      Feil, Adriano Friedrich; Costa, Marlla Vallerius da; Amaral, Livio; Teixeira, Sergio Ribeiro; Migowski, Pedro; Dupont, Jairton; Machado, Giovanna; Peripolli, Suzana Bottega (2010) [Artigo de periódico]
      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 ...