Search results for " TiO2 nanotubes"

showing 5 items of 5 documents

Redshift of absorption threshold of TiO2 Nanotubes due to Cu2O electrodeposition

2013

Settore ING-IND/23 - Chimica Fisica ApplicataRedshift of absorption threshold TiO2 Nanotubes Cu2O electrodeposition
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Electronic Properties of Thermal Oxides on Ti and Their Influence on Impedance and Photoelectrochemical Behavior of TiO2 Nanotubes

2017

Thermal oxidation of titaniumwas carried out at 350◦C, 450◦C, and 550◦C for 2 h or 12 h.X-rayDiffraction and Raman Spectroscopy suggest that the thermal oxides are scarcely crystallinewhen the annealing temperature is low, while both anatase and rutile are present for high annealing temperature and time. Photoelectrochemical measurements allowed estimation of a bandgap decreasing from 3.35 eV to 3.15 eV with increasing annealing temperature. The impedance spectra confirmed the formation of n-type semiconductors, with an impedance strongly decreasing on going from a reverse bias toward a forward bias regime. TiO2 nanotubes grown by anodizing Ti in NH4F and water containing ethylene glycol so…

Materials scienceRenewable Energy Sustainability and the EnvironmentAnnealing anodizing Impedance photoelectrochemistry Thermal oxidation Ti TiO2 Nanotubes020209 energyNanotechnology02 engineering and technology021001 nanoscience & nanotechnologyCondensed Matter PhysicsSurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsSettore ING-IND/23 - Chimica Fisica ApplicataThermal0202 electrical engineering electronic engineering information engineeringMaterials ChemistryElectrochemistry0210 nano-technologyElectrical impedanceElectronic properties
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The effect of Annealing Conditions on the Impedance and on the Photoelectrochemical behavior of TiO2 Nanotubes

2015

Titanium oxide nanotubes (NTs) have attracted much attention during last decade due to their special characteristics such as one-dimensional highly ordered geometry with large surface area and good chemical and optical stability.

Settore ING-IND/23 - Chimica Fisica ApplicataAnnealing Conditions Impedance and Photoelectrochemical characterizations TiO2 Nanotubes
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Multiscale Approach in Studying the Influence of Annealing Conditions on Conductivity of TiO2 Nanotubes

2015

Titanium oxide nanotubes (NTs) have attracted much attention during last decade due to their special characteristics such as one-dimensional highly ordered geometry with large surface area and good chemical and optical stability.

Settore ING-IND/23 - Chimica Fisica ApplicataMultiscale Approach Influence of Annealing Conditions Conductivity TiO2 NanotubesSettore ING-INF/01 - Elettronica
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Photoelectrocatalytic oxidation of 3-pyridinemethanol to 3-pyridinemethanal and vitamin B3 by TiO2 nanotubes

2020

In this paper, the first photoelectrocatalytic (PEC) 3-pyridinemethanol oxidation to 3-pyridinemethanal and vitamin B-3 was investigated. To meet this aim, efficient nanotube structured TiO2 on a Ti plate as a photoanode was prepared by an anodic oxidation method in ethylene glycol and characterized by XRD, SEM, and photocurrent techniques. The effect of nanotube morphology, applied potential, Na2SO4 concentration, stirring speed of solution, and pH on the reaction activity and product selectivities were investigated. The TiO2 phase of all of the anodes was mainly the anatase one. The PEC activity, the intensity of the XRD peak and the photocurrent increased by increasing the nanotube lengt…

PhotocurrentAnatasechemistry.chemical_compoundNanotubeSelective oxidation TiO2 nanotubes PEC reactionschemistryPhase (matter)Inorganic chemistryPhotocatalysisSelectivityEthylene glycolCatalysisCatalysis
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