Search results for "P-ANISALDEHYDE"

showing 6 items of 6 documents

Tuning The Selectivity To Aldehyde Via Ph Regulation In The Photocatalytic Oxidation Of 4-Methoxybenzyl Alcohol And Vanillyl Alcohol By Tio2 Catalysts

2021

Abstract The influence of pH on the photocatalytic partial oxidation of 4-methoxybenzyl alcohol (MBA) and vanillyl alcohol (VA) to their corresponding aldehydes in aqueous suspension under UVA irradiation was investigated by using poorly crystalline home-prepared and crystalline commercial TiO2 (BDH, Merck and Degussa P25) photocatalysts. The results clearly show as tuning pH can strongly impart selectivity and activity to photocatalytic processes which are often quite unselective in aqueous suspensions. It was found that pH effect on reaction rate and product selectivity strongly depended on TiO2 crystallinity and substrate type. In the case of MBA oxidation, photoreactivity and selectivit…

Alcohol02 engineering and technology010501 environmental sciences01 natural sciencesAldehydeGreen synthesis p-Anisaldehyde pH effect Photocatalysis TiO2 VanillinCatalysisVanillyl alcoholchemistry.chemical_compoundChemical Engineering (miscellaneous)Partial oxidationWaste Management and Disposal0105 earth and related environmental scienceschemistry.chemical_classificationSettore ING-IND/24 - Principi Di Ingegneria ChimicaAqueous solutionProcess Chemistry and Technology021001 nanoscience & nanotechnologyPollutioneye diseaseschemistryPhotocatalysissense organsSettore CHIM/07 - Fondamenti Chimici Delle Tecnologie0210 nano-technologySelectivityNuclear chemistry
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Home-prepared anatase, rutile, and brookite TiO2 for selective photocatalytic oxidation of 4-methoxybenzyl alcohol in water: reactivity and ATR-FTIR …

2009

5th European Meeting on Solar Chemistry and Photocatalysis -- OCT 04-08, 2008 -- Palermo, ITALY

AnataseSettore ING-IND/24 - Principi Di Ingegneria ChimicaAldehydesCatalystsChemistryBrookiteInorganic chemistryAlcoholSelective photooxidation 4-methoxybenzylalcohol TiO2 ATR-FTIRP-anisaldehydeCatalysischemistry.chemical_compoundOrganic-chemistryGreen routeRutilevisual_artvisual_art.visual_art_mediumPhotocatalysisAqueous suspensionReactivity (chemistry)Partial oxidationSettore CHIM/07 - Fondamenti Chimici Delle TecnologiePhysical and Theoretical Chemistry
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Heterogeneous Photocatalysis and Photoelectrocatalysis: From Unselective Abatement of Noxious Species to Selective Production of High-Value Chemicals

2015

Heterogeneous photocatalysis and photoelectrocatalysis have been considered as oxidation technologies to abate unselectively noxious species. This article focuses instead on the utilization of these methods for selective syntheses of organic molecules. Some promising reactions have been reported in the presence of various TiO2 samples and the important role played by the amorphous phase has been discussed. The low solubility of most of the organic compounds in water limits the utilization of photocatalysis. Dimethyl carbonate has been proposed as an alternative green organic solvent. The recovery of the products by coupling photocatalysis with pervaporation membrane technology seems to be a…

Membrane reactorSettore ING-IND/25 - Impianti ChimiciQuantum yieldPhotochemistryRedoxchemistry.chemical_compoundPhotocatalysi4-METHOXYBENZYL ALCOHOLANATASEAROMATIC ALCOHOLSTIO2 PHOTOCATALYSISGeneral Materials SciencePhysical and Theoretical ChemistrySolubilityAQUEOUS SUSPENSIONSettore ING-IND/24 - Principi Di Ingegneria ChimicaTITANIUM-DIOXIDEChemistryLIGHT IRRADIATIONSubstrate (chemistry)P-ANISALDEHYDEAmorphous phaseWATER OXIDATIONPervaporation membranePARTIAL OXIDATIONChemical engineeringSettore CHIM/03 - Chimica Generale E InorganicaPhotocatalysisPhotoelectrocatalysisDimethyl carbonateWater detoxificationGREEN SYNTHESIS
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N-Doped Anatase/Rutile Photocatalysts for the Synthesis of Aromatic Aldehydes Under Ultraviolet and Solar Irradiation

2015

N-doped anatase/rutile photocatalysts were prepared by a sol-gel method, using TiCl4 as TiO2 precursor and urea as N-dopant source. The catalysts required a thermal treatment at temperature higher than 300 degrees C to achieve actual nitrogen doping; this treatment also allowed obtaining crystalline and hydrophobic samples. Moreover, nitrogen doping modified the surface of samples by increasing the anatase to rutile phase ratio and hydrophilicity. The catalysts were characterized by BET specific surface area, XRD, ESEM, TGA, FT-IR, DRS and XPS measurements, with particular attention to the assessment of the N-doping effect. It was found that XPS analysis should be used together with DRS and…

Settore ING-IND/24 - Principi Di Ingegneria ChimicaAnataseMaterials scienceN-Doped TiO2 Photocatalysis Solar Irradiation Green Synthesis p-Anisaldehyde X-ray Photoelectron SpectroscopyInorganic chemistryDopingPhotochemistrymedicine.disease_causeSettore CHIM/03 - Chimica Generale E InorganicaRutilemedicineGeneral Materials ScienceIrradiationUltravioletScience of Advanced Materials
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Photoelectrocatalytic Selective Synthesis of p-Anisaldehyde in Water by TiO2 Supported on Ti Anodes

2013

Settore ING-IND/24 - Principi Di Ingegneria ChimicaPhotoelectrocatalytic Selective Synthesis p-Anisaldehyde Supported TiO2
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Photocatalytic Selective Oxidation of 4-Methoxybenzyl Alcohol to Aldehyde in Aqueous Suspension of Home-Prepared Titanium Dioxide Catalyst

2007

WOS: 000246040000026

chemistry.chemical_classificationTitanium DioxideAqueous solutionInorganic chemistryAlcoholGeneral ChemistrySelective OxidationAldehydeCatalysischemistry.chemical_compoundchemistryAlcohol oxidationTitanium dioxideTitanium tetrachloridePhotocatalysisPhotocatalysisP-Anisaldehyde ProductionAdvanced Synthesis & Catalysis
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