Search results for " Photocatalysis"

showing 6 items of 166 documents

Environmental Organic Photochemistry: Advances and Perspectives

2013

This review is a survey of recent advances in environment related aspects of organic photochemistry. Besides presenting gen- eral concepts, the manuscript is mainly focused on the photoreactivity of natural organic matter, and on the photochemistry of anthropo- genic substances under natural light irradiation.

photo- oxidationorganic photochemistryChemistryOrganic ChemistryMechanistic organic photochemistryLight irradiationSettore CHIM/06 - Chimica OrganicaEnvironmental photochemistry organic photochemistry natural organic matter photocatalysis photodegradation photo- oxidation.Natural organic matterSettore CHIM/12 - Chimica Dell'Ambiente E Dei Beni Culturaliphoto- oxidation.Organic chemistryEnvironmental photochemistrySettore CHIM/01 - Chimica Analiticanatural organic matterphotodegradationphotocatalysis
researchProduct

Role of the support and pseudo-liquid phase in the Phosphotungstic Heteropolyacid (photo)catalytic activity

2016

Catalytic and photocatalytic tests for propene hydration to 2-propanol were successfully carried out by using binary materials obtained by supporting a Keggin or Wells-Dawson heteropolyacids via impregnation method to commercial SiO2 or TiO2. (Photo)catalytic hydration was studied in gas-solid regime by using a continuous (photo)reactor working at atmospheric pressure and 80 °C. The alcohol was the main product. The acidity of the cluster accounts for the catalytic role, whereas both the acidity of the cluster and the oxidant ability were responsible for the increase of the reaction rate of the photo-assisted catalytic reaction. Moreover, the presence of a photoactive semiconductor support …

pseudo-liquid phase photocatalysis heteropolyacidSettore CHIM/07 - Fondamenti Chimici Delle Tecnologie
researchProduct

Photocatalytic activity in gas–solid regime of ZnO-ZnAl2O4 composites

2011

spinel photocatalysis ZnO-ZnAl2O4 composites hydrotalciteSettore CHIM/07 - Fondamenti Chimici Delle Tecnologie
researchProduct

Combination of Photocatalysis and Ozonation for the treatment of Contaminated Water Containing Bromide Ions

2013

titanium dioxide photocatalysisn ozonationSettore CHIM/07 - Fondamenti Chimici Delle Tecnologie
researchProduct

Carbon Nitride-Based Catalysts for High Pressure CO2 Photoreduction

2022

In the current research, the productivity of CO2 photoreduction has been boosted by performing the reaction in an innovative photocatalytic reactor, which allows for operation up to 20 bar. A set of photocatalysts were used, including three types of pristine TiO2, i.e., one commercially prepared (Evonik P25), one home-prepared by flame spray pyrolysis (FSP), and one obtained by the hydrolysis of TiCl4 (TiO2exCl), a bare thermo-exfoliated carbon nitride (C3N4-TE), and binary materials composed of TiO2 and C3N4-TE. The photoreduction was carried out in water at pH 14 and in the presence of Na2SO3 as a hole scavenger. Hydrogen and very small amounts of CO were detected in the head space of the…

titanium dioxidesolar fuelsSettore ING-IND/25 - Impianti ChimiciCatalysiscarbon capture and conversionCO<sub>2</sub> photoreduction; carbon capture and conversion; photocatalysis; pressurized photoreactor; titanium dioxide; carbon nitride; solar fuelsCO2 photoreductionCO2 photoreduction; carbon capture and conversion; photocatalysis; pressurized photoreactor; titanium dioxide; carbon nitride; solar fuelsSettore CHIM/07 - Fondamenti Chimici Delle TecnologiePhysical and Theoretical Chemistrypressurized photoreactorcarbon nitridephotocatalysisGeneral Environmental Science
researchProduct

Photocatalytic nano-composite architectural lime mortar for degradation of urban pollutants under solar and visible (interior) light

2017

Abstract Recent advances in nano-technology and nano-additives can give enhanced properties to natural hydraulic lime (NHL), creating a multifunctional material. We have prepared a novel nanocomposite, made of a commercial mortar with 1 wt% and 5 wt% added titania nanoparticles (NPs). These TiO 2 NPs are themselves doped with 1 mol% silver, to give the material enhanced photocatalytic and antimicrobial properties. The Ag-doped TiO 2 NPs were made from a simple, costs effective, aqueous green nanosynthesis process, and the end material only contains 0.01–0.05% Ag. As this mortar is intended to both combat atmospheric pollution, and create more durable/lower maintenance building facades (plas…

xTitaniaMaterials scienceSettore ING-IND/22 - Scienza e Tecnologia dei MaterialiSettore ICAR/10 - Architettura Tecnica02 engineering and technology010501 environmental sciencesengineering.material01 natural sciencesNOCoatingGeneral Materials SciencePhotocatalysisLime mortarComposite materialCuring (chemistry)0105 earth and related environmental sciencesCivil and Structural EngineeringSettore CHIM/03 - Chimica Generale e InorganicaNanocompositeNanocompositeSettore CHIM/07 - Fondamenti Chimici delle TecnologieHydraulic limeBuilding and Construction021001 nanoscience & nanotechnologyMortarengineeringPhotocatalysisMortar Natural hydraulic lime Photocatalysis NOx Titania NanocompositeNatural hydraulic limeMortar0210 nano-technologyMortar; Nanocomposite; Natural hydraulic lime; NO; x; Photocatalysis; TitaniaVisible spectrum
researchProduct