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RESEARCH PRODUCT

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

Leonardo PalmisanoElisa I. García-lópezSalvador OrdóñezEva DíazGiuseppe MarcìIgor KrivtsovIgor KrivtsovJosé R. GarcíaZakariae Amghouz

subject

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

description

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% of selectivity versus FDC formation at 40% of HMF conversion. The utilization of radical scavengers revealed that O2− was the main reactive species responsible for HMF oxidation to FDC. The photocatalytic test carried out under natural solar irradiation resulted in higher yields of FDC compared to that observed in the laboratory UV irradiated set-up, thus demonstrating the applicability of the exfoliated carbon nitride material in real-life conditions.

yearjournalcountryeditionlanguage
2017-05-01
10.1016/j.apcatb.2016.11.049http://hdl.handle.net/10447/278122