0000000000068769

AUTHOR

Bilge Sina Tek

showing 4 related works from this author

Photocatalytic Selective Oxidation of 5-(Hydroxymethyl)-2-furaldehyde to 2,5-Furandicarbaldehyde in Water by Using Anatase, Rutile, and Brookite TiO2…

2013

5-(Hydroxymethyl)-2-furaldehyde (HMF) was selectively oxidized to 2,5-furandicarbaldehyde (FDC) in; aqueous medium by using home prepared (HP) anatase, rutile, and brookite TiO2 nanoparticles. HP samples were prepared via a sol-gel method by using TiCl4 as the TiO2 precursor. Commercial TiO2 catalysts were also used for, comparison. All samples were characterized by BET specific surface area, XRD, TGA, and SEM, and the reactivity results showed that HP catalysts are predominantly amorphous and give rise to selectivities toward FDC more than twice that of commercial and well crystallized catalysts.

AnataseRenewable Energy Sustainability and the EnvironmentChemistryBrookiteFuraldehydeGeneral Chemical EngineeringInorganic chemistry5-(Hydroxymethyl)-2-furaldehyde Selective oxidation Photocatalytic synthesis TiO2 25-FurandicarbaldehydeGeneral ChemistryCatalysischemistry.chemical_compoundRutilevisual_artSpecific surface areavisual_art.visual_art_mediumPhotocatalysisEnvironmental ChemistryHydroxymethylSettore CHIM/07 - Fondamenti Chimici Delle TecnologieNuclear chemistryACS Sustainable Chemistry & Engineering
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Selective photooxidation of ortho-substituted benzyl alcohols and the catalytic role of ortho-methoxybenzaldehyde

2016

It has been recently reported by Palmisano et al. (2015) [1] that the oxidation of 2-methoxybenzyl alcohol (2-MBA) to 2-methoxybenzaldehyde (2-MBAD) proceeds in water under near-UV light with an unexpected catalytic effect of 2-MBAD. In order to investigate the catalytic role of aldehyde in photolytic oxidation of ortho-substituted benzyl alcohols (OSBAs), reactivity runs were carried out with 2-methylbenzyl alcohol (2-MeBA), 2-nitrobenzyl alcohol (2-NBA), 2-hydroxybenzyl alcohol (2-HBA) and 2-chlorobenzyl alcohol (2-CIBA) in the absence and in the presence of their corresponding aldehyde. None of those alcohols showed a measurable oxidation rate even in the presence of their aldehydes but …

General Chemical EngineeringGeneral Physics and AstronomyAlcohol2-MethoxybenzaldehydeHomogeneous photocatalysi010402 general chemistry01 natural sciencesAldehydeCatalysisFerulic acidPhysics and Astronomy (all)chemistry.chemical_compoundBenzyl alcoholOrganic chemistryChemical Engineering (all)Reactivity (chemistry)chemistry.chemical_classificationSettore ING-IND/24 - Principi Di Ingegneria Chimica010405 organic chemistryChemistryChemistry (all)General Chemistry0104 chemical sciencesAutocatalytic photooxidationAlcohol oxidationPhotocatalysis2-Methoxybenzaldehyde; Autocatalytic photooxidation; Benzyl alcohols; Homogeneous photocatalysis; Chemistry (all); Chemical Engineering (all); Physics and Astronomy (all)Selectivity
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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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Unexpectedly ambivalent O-2 role in the autocatalytic photooxidation of 2-methoxybenzyl alcohol in water

2015

An unusual autocatalytic photooxidation of 2-methoxybenzyl alcohol has been observed under UV irradiation in aqueous medium. The homogeneous oxidation is catalyzed by the corresponding aldehyde that is also the main oxidation product. The trend of alcohol disappearance rate matches the typical shape of an autocatalytic process, where a crucial and ambivalent role is played by the presence of molecular oxygen. Low oxygen concentrations give rise to a zero-order reaction since the beginning of irradiation, while higher amounts of oxygen reduce the alcohol oxidation rate until the aldehyde reaches a concentration high enough to speed up the alcohol's conversion. Experiments performed by varyin…

chemistry.chemical_classificationSettore ING-IND/24 - Principi Di Ingegneria ChimicaAqueous solutionAutocatalytic photooxidation 2-Methoxybenzyl alcohol 2-Methoxybenzaldehyd O2 quenchingHomogeneous photocatalysisProcess Chemistry and Technologychemistry.chemical_elementAlcoholSettore CHIM/06 - Chimica OrganicaPhotochemistryOxygenAldehydeCatalysisCatalysisAutocatalysischemistry.chemical_compoundchemistrySettore CHIM/03 - Chimica Generale E InorganicaAlcohol oxidationPhysical and Theoretical ChemistryAbsorption (chemistry)
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