Search results for "electrogeneration of base"

showing 6 items of 6 documents

1D cerium oxy-hydroxide nanostructures deposition via electrogeneration of base into anodic alumina membrane

2008

cerium oxy-hydroxide nanostructures deposition via electrogeneration of base anodic alumina membrane
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Room temperature electrodeposition of photoactive Cd(OH)2 nanowires

2009

Cd(OH)2 nanowires (NWs) were successfully prepared by room temperature electrogeneration of base using Cd(NO3)2 aqueous electrolyte and Anodic Alumina Membrane (AAM) as template. Cd(OH)2 films have been also deposited on tin-doped indium oxide (ITO) for comparison. SEM analysis shows high quality deposits made of closely packed nanowires (NWs) into AAM and uniform flake-like surface on ITO. XRD analysis reveals that Cd(OH)2 films on ITO are polycrystalline, while the nanowires grow along the preferential directions [100] and [110]. Photoelectrochemical measurements show that Cd(OH)2 NWs are photoactive materials with indirect and direct band gap of 2.15 and 2.75 eV, respectively. Keywords: …

Materials scienceScanning electron microscopeBand gapNanowireOxidechemistry.chemical_elementNanotechnologylcsh:Chemistrychemistry.chemical_compoundTransition metalBand gapElectrochemistryNanowiresElectrogeneration of baseCd(OH)2Settore ING-IND/23 - Chimica Fisica ApplicataChemical engineeringchemistrylcsh:Industrial electrochemistrylcsh:QD1-999Direct and indirect band gapsCrystallitenanowire band gap electrodepositionIndiumlcsh:TP250-261
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From ceria nanotubes to nanowires through electrogeneration of base

2009

The preparation of Ce(OH)3/CeO2 nanostructures (NSs) through electrogeneration of base into anodic alumina membranes was studied. The effects of solvent (alcohol and/or water), Ce3? partner anion nature (chloride or nitrate) and concentration, applied potential or current density in driving the morphology toward nanowires (NWs) and/or nanotubes (NTs) was described. The structural analysis performed by X-Ray Diffraction and Raman Spectroscopy allowed to evidence that the presence of Ce(IV) into the nanostructures strongly depends on the oxygen content in the growing environment.

chemistry.chemical_classificationCeria Nanowires NanotubesTemplate Electrogeneration of baseMaterials scienceNanostructureBase (chemistry)General Chemical EngineeringInorganic chemistryNanowireElectrochemistryChlorideIonSolventsymbols.namesakeSettore ING-IND/23 - Chimica Fisica ApplicatachemistryCeria Electrogeneration of base Nanotubes Nanowires TemplateMaterials ChemistryElectrochemistrysymbolsmedicineRaman spectroscopymedicine.drugJournal of Applied Electrochemistry
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Comments on 'formation and characterization of nanotubes of La(OH) 3 obtained using porous alumina membranes'

2010

New experimental evidence concerning the formation of La(OH)3 nanowires on anodic alumina membranes by cathodic polarization in 0.05 M lanthanum nitrate solution is provided to further support the conclusions previously reached in our work (Bocchetta et al 2007 Electrochem. Commun. 9 683-8) and recently criticized by González-Rovira et al (Nanotechnology 2008 19 495305). Some unconvincing aspects of the paper of González-Rovira et al, according to which the same electrochemical process should lead to the formation of hydroxycarbonate nanotubes, are also discussed.

Lanthanum nitrateMaterials scienceMechanical EngineeringAlumina membranesNanowireBioengineeringNanotechnologyCathodic polarizationGeneral ChemistryElectrochemistryAnodeCharacterization (materials science)Settore ING-IND/23 - Chimica Fisica ApplicataChemical engineeringLa(OH)3 nanowireelectrogeneration of base anodic alumina membraneMechanics of MaterialsAnodic alumina membranes Electrochemical process Experimental evidence Hydroxy carbonates Lanthanum nitrates Porous alumina membranesGeneral Materials ScienceElectrical and Electronic EngineeringPorosity
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Cerium oxyhydroxide nanowire growth via electrogeneration of base in nonaqueous electrolytes

2008

The preparation of compact cerium oxyhydroxide nanowires into anodic alumina membranes from cerium chloride in ethanol solution via electrogeneration of base is reported. Scanning electron microscopy analyses indicate that dense, well-aligned, and highly ordered nanowires can be formed in a wide range of applied potentials and current densities in alcoholic solution. The employment of water brings to a hybrid nanotube/nanowire structure, suggesting a key role of the electrolyte nature in determining the morphology of the deposit. Electrochemical findings and X-ray diffraction analysis have shown that nanowires are constituted by a Ce(III)/Ce(IV) oxyhydroxide that can be completely oxidized …

NanotubeMaterials scienceNanostructureScanning electron microscopeNanowiresGeneral Chemical EngineeringCeO2 nanowire electrogeneration of baseInorganic chemistryNanowirechemistry.chemical_elementThermal treatmentElectrolyteCerium oxideElectrochemistryChlorideCeriumSettore ING-IND/23 - Chimica Fisica ApplicatachemistryElectrochemistrymedicineGeneral Materials ScienceElectrical and Electronic EngineeringPhysical and Theoretical Chemistrymedicine.drug
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From CeO2 Nanotubes to Nanowires through Electrogeneration of Base

2009

Abstract not Available.

ceria nanotubesnanowireselectrogeneration of baseECS Meeting Abstracts
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