Search results for "OXIDATION"

showing 10 items of 1913 documents

Improvement of the photo-stability of nanocomposite based LDPE/EVA films

2008

Settore ING-IND/22 - Scienza E Tecnologia Dei MaterialiNanocomposites Photo-oxidation LDPE EVA
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Influence of the matrix on photo-oxidative degradation of polyolefin based nanocomposite films

2008

Settore ING-IND/22 - Scienza E Tecnologia Dei MaterialiNanocomposites Photo-oxidation Polyolefin
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Effect of graphene nanoplatelets on the photo-oxidative behavior of PP based nanocomposites

2018

The photo-oxidation behavior of polymer nanocomposites depends not only on the photo-oxidation behavior of the matrix, but also on the chemical composition and on the physical properties of the nanoparticles and on the possible interactions between the two phases. Graphene nanoplatelets (GnP) are short stacks of individual layers of graphite that, even at low contents, strongly affects many properties of the thermoplastic matrix. Indeed, by GnP adding, also at low filler concentration (< 5 wt.%), the mechanical, heat-resistance, thermal and electrical properties of the polymer matrix can be surprisingly modified. Of course, the effects of these nanoparticles on the properties of the poly…

Settore ING-IND/22 - Scienza E Tecnologia Dei MaterialinanocompositeGraphene nanoplatelets (GnP)PPphoto-oxidation
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FABBRICAZIONE DI SENSORI ELETTROCHIMICI NANOSTRUTTURATI PER APPLICAZIONI NELL’INDUSTRIA ALIMENTARE E BIOMEDICHE

2023

Settore ING-IND/23 - Chimica Fisica ApplicataAscorbic Acid Uric Acid Sensors Electrochemical Oxidation Reduced Graphene Oxide Gold Nanoparticles Electrochemical Sensors Body Fluids Electrodeposition Glucose Milk Fruit Juice Urine Sweat pH PANI Dopamine
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Photoelectrochemical Synthesis of Polypyrrole on Anodic Ta2O5 Films

2007

Polypyrrole film was photoelectrochemically grown on insulating Ta2O5 anodic film in acetonitrile solution. A characterization by photocurrent spectroscopy PCS of metal/oxide/polypyrrole interface was carried out. The PCS results suggest that a metallic-like PPy is formed under illumination at constant anodic potential. By polarizing the polypyrrole at cathodic potentials a photocurrent spectrum typical of p-type semiconducting film was recorded. A scanning electron microscopy study of PPy surfaces solution side and oxide side allowed us to obtain information on the morphology of the polymer as well as a rough estimate of the film thickness and of the diameter of PPy globules at the two int…

Settore ING-IND/23 - Chimica Fisica ApplicataCONDUCTING POLYMERSTHICKNESSMETALSFIELD-EFFECT TRANSISTORSFIELD-EFFECT TRANSISTORS; CONDUCTING POLYMERS; GENERATION; TANTALUM; METALS; THICKNESS; OXIDATIONOXIDATIONTANTALUMGENERATION
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Silicate and Hydroxide Concentration Influencing the Properties of Composite Al2O3-TiO2 PEO Coatings on AA7075 Alloy

2021

This work evaluates the effect of sodium meta-silicate pentahydrate (SMS) and potassium hydroxide concentrations on properties of Al2O3-TiO2 coatings produced through plasma electrolytic oxidation in a solution containing 3 g L−1 potassium titanyl oxalate, (PTO), using a unipolar waveform with constant current density. The surface and cross-section characteristics of PEO coatings including morphology, elemental distribution, and phase composition were evaluated using FESEM, EDS, and XRD techniques. Voltage-time response indicated the concentration of SMS and KOH had a significant effect on the duration of each stage of the PEO process. More cracks and pores were formed at the higher concent…

Settore ING-IND/23 - Chimica Fisica ApplicataPlasma electrolytic oxidationCorrosion resistanceSilicate-based electrolyteMaterials ChemistryAl<sub>2</sub>O<sub>3</sub>-TiO<sub>2</sub> coatingSurfaces and InterfacesTA1-2040Al2 O3-TiO2 coatingEngineering (General). Civil engineering (General)Al<sub>2</sub>O<sub>3</sub>-TiO<sub>2</sub> coating; plasma electrolytic oxidation; silicate-based electrolyte; corrosion resistanceSurfaces Coatings and FilmsCoatings; Volume 12; Issue 1; Pages: 33
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Photocatalysis in dimethyl carbonate green solvent: degradation and partial oxidation of phenanthrene on supported TiO2

2014

Dimethyl carbonate (DMC) is here proposed – for the first time – as a green organic solvent for photocatalytic synthesis. In this work, the photocatalytic partial oxidation of phenanthrene in dimethyl carbonate (DMC) by using anatase TiO2 as the photocatalyst is described as paradigmatic example of a green synthetic process starting from polycyclic aromatic hydrocarbons (PAHs). For comparison, the same reaction carried out also in ethanol, 1-propanol or 2-propanol is reported. The use of DMC as the solvent allowed us to achieve 19% and 23% selectivity towards 9-fluorenone and 6H-benzo[c]chromen- 6-one, respectively. The proposed approach may represent both a new green synthetic process and …

Settore ING-IND/24 - Principi Di Ingegneria ChimicaAnataseGeneral Chemical EngineeringGeneral ChemistryPhenanthreneaaSolventchemistry.chemical_compoundchemistryPhotocatalysisDegradation (geology)Organic chemistrySettore CHIM/07 - Fondamenti Chimici Delle TecnologiePartial oxidationDimethyl carbonatephenanthrene supported TiO2 partial oxidation green solventSelectivityRSC Adv.
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Graphite-supported TiO2 for 4-nitrophenol degradation in a photoelectrocatalytic reactor

2009

WOS: 000274769500044

Settore ING-IND/24 - Principi Di Ingegneria ChimicaAnataseMaterials scienceAqueous solutionScanning electron microscopePhotoelectrocatalytic degradation photoelectrocatalytic reactor graphite supported TiO2 4-nitropheol oxidationGeneral Chemical EngineeringContinuous reactorAnalytical chemistryGraphite-Supported Tio2General Chemistry4 Nitrophenol OxidationIndustrial and Manufacturing EngineeringAmorphous solidPhotoelectrocatalytic ReactorElectrodeEnvironmental ChemistrySettore CHIM/07 - Fondamenti Chimici Delle TecnologieGraphiteEnergy sourcePhotoeletrocatalytic DegradationChemical Engineering Journal
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Nanostructured anatase TiO2 densified at high pressure as advanced visible light photocatalysts

2015

This study reports on characterization and photoactivity of nanostructured TiO2 samples, which have been permanently densified under high pressures, up to 2.1 GPa. Commercial Mirkat 211 anatase has been used as a benchmark sample, in order to investigate the effect of unidirectional high pressure on structural, optical and photocatalytic properties of TiO2. Vibrational Raman spectroscopy shows that the treatment does not cause transitions among the different crystalline phases of titanium dioxide. UV-vis diffuse reflectance spectra reveal that increasing pressure gives rise to a shift of the absorption onset towards higher wavelength enhancing the photoactivity under visible radiation. Samp…

Settore ING-IND/24 - Principi Di Ingegneria ChimicaAnataseMaterials scienceMineralogysymbols.namesakechemistry.chemical_compoundchemistryChemical engineeringTitanium dioxidePhotocatalysissymbolsPhotocatalysis Anatase Densified TiO2IrradiationPartial oxidationPhotocatalysisPhysical and Theoretical ChemistryAbsorption (electromagnetic radiation)Raman spectroscopyVisible spectrumPhotochemical &amp; Photobiological Sciences
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Partial photocatalytic oxidation of glycerol in TiO2 water suspensions

2010

2nd European Conference on Environmental Applications of Advanced Oxidation Processes -- SEP 09-11, 2009 -- Nicosia, CYPRUS

Settore ING-IND/24 - Principi Di Ingegneria ChimicaAnataseTitanium DioxideAqueous solutionFormic acidElectrospray ionizationGlycerol partial oxidation Selective photocatalytic oxidation Titanium dioxide Reaction pathwaysInorganic chemistryAqueous two-phase systemGeneral ChemistryCatalysischemistry.chemical_compoundchemistryGlyceraldehydeTitanium dioxideGlycerolSettore CHIM/07 - Fondamenti Chimici Delle TecnologieSelective Photocatalytic OxidationGlycerol Partial OxidationReaction Pathways
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