0000000000123037

AUTHOR

Danilo Virtù

showing 3 related works from this author

Photocatalytic and photoelectrocatalytic H2 evolution combined with valuable furfural production

2023

In this work the photocatalytic (PC) and photoelectrocatalytic (PEC) reforming of furfuryl alcohol (FA) under environmental friendly conditions was investigated. Both H2 evolution and partial oxidation to furfuraldehyde were followed. For the first time TiO2 based photocatalysts were studied and the photocatalytic activity of home prepared photocatalysts was compared with that of commercial ones under both UVA and simulated solar irradiation. PEC tests were performed by using home prepared TiO2 nanotubes (TiO2 NTs) as photoanode and Pt free Ni foam as cathode to improve the Hydrogen Evolution Reaction (HER). Both the partial FA oxidation reaction rate and H2 evolution rate were normalized f…

Settore ING-IND/24 - Principi Di Ingegneria ChimicaSettore ING-IND/23 - Chimica Fisica ApplicataFurfuryl alcohol partial oxidationProcess Chemistry and TechnologyTiO2PhotoelectrocatalysisSettore CHIM/07 - Fondamenti Chimici Delle TecnologieH2 productionPhotocatalysisbrookiteCatalysisPt free cathodeApplied Catalysis A: General
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Heterogeneous photocatalytic aqueous succinic acid formation from maleic acid reduction

2022

This study reports the anaerobic reduction of maleic acid to succinic acid in aqueous dispersion of different TiO2 based photocatalysts. Some home prepared and commercial solids containing different polymorphic phases of TiO2 and loaded with Pt and Ru were compared at different acidic pHs. The aim of the work was to verify the feasibility of the process and to determine the best samples and the optimal experimental conditions of the reaction. The best selectivity towards succinic acid was 23.2 % at 70 % of maleic acid conversion. Fumaric acid was also formed as another high added value compound, and its quantity was related to the experimental conditions and the photocatalyst used.

Maleic acid reductionSettore ING-IND/24 - Principi Di Ingegneria ChimicaSuccinic acid productionHigh added value chemicalsGeneral Chemical EngineeringEnvironmental ChemistryTiO2General ChemistryPhotocatalytic synthesisIndustrial and Manufacturing Engineering
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Tuning of the Mg Alloy AZ31 Anodizing Process for Biodegradable Implants

2021

Coatings were grown on the AZ31 Mg alloy by a hard anodizing process in the hot glycerol phosphate-containing electrolyte. Anodizing conditions were optimized, maximizing corrosion resistance estimated by impedance measurements carried out in Hank's solution at 37 °C. A post anodizing annealing treatment (350 °C for 24 h) allowed us to further enhance the corrosion resistance of the coatings mainly containing magnesium phosphate according to energy-dispersive X-ray spectroscopy and Raman analyses. Gravimetric measurements revealed a hydrogen evolution rate within the limits acceptable for application of AZ31 in biomedical devices. In vitro tests demonstrated that the coatings are biocompati…

Materials scienceAnnealing (metallurgy)Surface PropertiesAlloyMagnesium Compounds02 engineering and technologyElectrolyteengineering.material010402 general chemistry01 natural sciencesbiomedicalCorrosionCell LinePhosphatesMiceCoated Materials BiocompatibleAbsorbable ImplantsMaterials TestingAlloysAnimalsGeneral Materials ScienceMg alloyElectrodesMagnesium phosphatecorrosion resistanceAnodizing021001 nanoscience & nanotechnology0104 chemical sciencesDielectric spectroscopyCorrosionSettore ING-IND/23 - Chimica Fisica Applicataelectrochemical impedance spectroscopyChemical engineeringengineeringGravimetric analysishard anodizing0210 nano-technologyResearch ArticleACS Applied Materials & Interfaces
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