Search results for "Photocatalytic"

showing 10 items of 91 documents

Photocatalytic ozonation for a sustainable aquaculture: A long-term test in a seawater aquarium

2019

Abstract A long-term test at a laboratory scale with a closed system (a coral reef aquarium) has been carried out to study the potentialities of photocatalytic ozonation and photocatalysis for the removal of noxious organic compounds in recirculating systems (aquaria and recirculating aquaculture systems) working with a minimum make up of new water. Attention has been focused not only on the depuration capabilities but also on possible negative phenomena, some of which could become apparent only at long times. After having tuned the system by setting appropriate operating conditions and procedures, positive results were obtained. In particular, it was observed that the alternation of photoc…

AquariumPortable water purificationLaboratory scaleCatalysisCatalysiRecirculating aquaculture systemschemistry.chemical_compoundPhotocatalysiAquacultureOzonationRecirculating aquaculture systemPhotocatalysisGeneral Environmental SciencePhotocatalytic ozonationSettore ING-IND/24 - Principi Di Ingegneria Chimica2300business.industryProcess Chemistry and TechnologyPulp and paper industryBromatechemistrySustainable aquaculturePhotocatalysisEnvironmental scienceSeawaterWater qualitybusinessDepurationAquarium; Depuration; Ozonation; Photocatalysis; Photocatalytic ozonation; Recirculating aquaculture systemsApplied Catalysis B: Environmental
researchProduct

Development of Eco-Friendly and Self-Cleaning Lime-Pozzolan Plasters for Bio-Construction and Cultural Heritage

2020

Summarization: Nowadays, the design and use of multi-functional mortars has increased significantly, with interesting applications in the green building and cultural heritage conservation sectors. A key point for a correct adoption of these innovative materials is their behavior along time and their resistance to the weathering. The objective of this project was to define the performance and durability of innovative mortars, in order to use them correctly and to avoid irreparable damage over time. For the development of this project, lime–metakaolin and hydraulic lime–metakaolin based mortars (hereinafter called A, B), as well as A and B with the addition of nano-TiO2 and perlite (hereinaft…

Artificial ageingAbsorption of waterenergy efficient mortars; photocatalytic; cultural heritage; bio architecture; nano-titanium dioxide; artificial ageing; self-cleaning0211 other engineering and technologiesPhotocatalytic02 engineering and technologyengineering.materialnano-titanium dioxidelcsh:TH1-9745Nano-titanium dioxideenergy efficient mortarenergy efficient mortarsBio architectureFlexural strength021105 building & constructionArchitectureartificial ageingCivil and Structural EngineeringLimeEnvironmental engineeringBuilding and ConstructionPozzolancultural heritage021001 nanoscience & nanotechnologyphotocatalyticEnvironmentally friendlyDurabilitySettore ICAR/12 - Tecnologia Dell'ArchitetturaCultural heritageengineeringPerlitebio architectureEnvironmental scienceMortar0210 nano-technologySelf-cleaningself-cleaningEnergy efficient mortarslcsh:Building constructionBuildings
researchProduct

Comparison between catalytic and catalytic photo-assisted propene hydration by using supported heteropolyacid

2012

Abstract Hybrid materials have been prepared by impregnation of the heteropolyacid H 3 PW 12 O 40 on commercial TiO 2 . The polyoxometalates (POM) amount deposited was 15, 30, 50 and 70% with respect to the weight of the TiO 2 support. Moreover two samples containing a POM amount of 15, and 50% with respect to the weight of SiO 2 were also prepared for the sake of comparison. All prepared samples were efficient catalysts for the hydration of propene to 2-propanol in gas–solid regime at atmospheric pressure and at temperatures ranging between 50 and 85 °C. The study carried out on the hybrid TiO 2 based materials evidenced that, as far as the catalytic activity is concerned, exists an optimu…

Atmospheric pressureProcess Chemistry and TechnologyPhoto assistedInorganic chemistryCATALYTI REACTION PHOTOCATALYTIC REACTION PROPENE HYDRATION POMCatalysisCatalysisPropenechemistry.chemical_compoundchemistrySettore CHIM/07 - Fondamenti Chimici Delle TecnologieIrradiationHybrid materialConduction bandApplied Catalysis A: General
researchProduct

Combination of ozonation and photocatalysis for purification of aqueous effluents containing formic acid as probe pollutant and bromide ion

2014

The treatment by advanced oxidation processes (AOPs) of waters contaminated by organic pollutants and containing also innocuous bromide ions may generate bromate ions as a co-product. In the present work heterogeneous photocatalysis and ozonation have individually been applied and in combination (integrated process) to degrade the organic compounds in water containing also bromide anions. The results show that: i) the sole photocatalysis does not produce bromate ions and in the case of its presence, it is able to reduce bromate to innocuous bromide ions; ii) the integration of photocatalysis and ozonation synergistically enhances the oxidation capabilities; and iii) in the integrated proces…

BromidesTime FactorsEnvironmental EngineeringFormatesTime FactorAdvanced oxidation processes; Bromate; Ozonation; Photocatalysis; Photocatalytic ozonation; Water purification; Bromates; Bromides; Catalysis; Formates; Ions; Kinetics; Oxidation-Reduction; Ozone; Time Factors; Water Pollutants Chemical; Ultraviolet Rays; Waste Disposal Fluid; Water Purification; Water Science and Technology; Waste Management and Disposal; Pollution; Ecological ModelingUltraviolet RaysFormic acidInorganic chemistryPortable water purificationWaste Disposal FluidCatalysisCatalysiCatalysischemistry.chemical_compoundOzonePhotocatalysiBromideOzonationIonWaste Management and DisposalBromateWater Science and TechnologyCivil and Structural EngineeringIonsKineticPhotocatalytic ozonationSettore ING-IND/24 - Principi Di Ingegneria ChimicaAqueous solutionWater purificationBromatesEcological ModelingFormateBromatePollutionKineticschemistryUltraviolet RayBromidePhotocatalysisOxidation-ReductionWater Pollutants ChemicalAdvanced oxidation processeWaste disposalWater Research
researchProduct

Graphitic C3N4 for CO2 reduction: a photoactivity and stability study

C3N4 CO2 reduction photocatalytic stabilitySettore CHIM/07 - Fondamenti Chimici Delle Tecnologie
researchProduct

Photocatalytic membrane reactor for CO2 conversion

2017

Photocatalytic membrane reactor for CO2 conversion

CO2 photoreductionSettore CHIM/07 - Fondamenti Chimici Delle Tecnologiecarbon nitridePhotocatalytic membrane reactor CO2 photoreduction carbon nitridePhotocatalytic membrane reactor
researchProduct

CO2 conversion in continuous photocatalytic membrane reactor

2017

CO2 conversion in continuous photocatalytic membrane reactor

CO2 photoreductioncontinuous photocatalytic membrane reactorSettore CHIM/07 - Fondamenti Chimici Delle Tecnologiecarbon nitrideCO2 photoreduction carbon nitride continuous photocatalytic membrane reactor
researchProduct

CO2 Reduction in Photocatalytic Membrane Reactor: Products Selectivity Study

2018

CO2 Reduction in Photocatalytic Membrane Reactor: Products Selectivity Study

CO2 reductionphotocatalytic membrane reactorCO2 reduction photocatalytic membrane reactor selectivity studySettore CHIM/07 - Fondamenti Chimici Delle Tecnologieselectivity study
researchProduct

Carbon nitride nanosheets for the selective photocatalytic oxidation of 5-hydroxymethyl-2-furfural to 2,5-furandicarboxyaldehyde in water suspension

2017

Carbon nitride nanosheets for the selective photocatalytic oxidation of 5-hydroxymethyl-2-furfural to 2,5-furandicarboxyaldehyde in water suspension

Carbon nitride photocatalytic oxidation of 5-hydroxymethyl-2-furfural 25-furandicarboxyaldehydeSettore CHIM/07 - Fondamenti Chimici Delle Tecnologie
researchProduct

Selective photocatalytic oxidation of 5-hydroxymethyl-2-furfural to 2,5-furandicarboxyaldehyde in aqueous suspension of g-C3N4

2017

Graphitic carbon nitride assisted partial photocatalytic oxidation of 5-hydroxymethyl-2-furfural (HMF) in aqueous medium was investigated. Different carbon nitride precursors were considered, being melamine the one yielding the most efficient photocatalyst. The obtained 30% selectivity of HMF oxidation to 2,5-furandicarboxaldehyde (FDC) is higher than those reported up to now. A further thermal exfoliation of the g-C3N4 samples showed under artificial light irradiation both an enhanced photocatalytic activity in conversion of HMF, and selectivity (ca. 42–45%) to FDC. The performance of the catalysts increased when the experiments were carried out under real outdoor illumination, reaching 50…

Carbon nitrideInorganic chemistry02 engineering and technology010402 general chemistry01 natural sciencesCatalysisCatalysisCatalysichemistry.chemical_compound5-hydroxymethyl-2-furfuralIrradiationExfoliationCarbon nitrideGeneral Environmental Science2300Process Chemistry and TechnologyGraphitic carbon nitridePartial photocatalytic oxidation021001 nanoscience & nanotechnologyCarbon nitridesExfoliation joint0104 chemical scienceschemistry25-FurandicarboxaldehydePhotocatalysisSettore CHIM/07 - Fondamenti Chimici Delle Tecnologie5-Hydroxymethyl-2-furfural0210 nano-technologyMelamineSelectivity
researchProduct