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Utilice este identificador para citar o enlazar este documento: https://ria.asturias.es/RIA/handle/123456789/10872


Título: Selective photocatalytic oxidation of 5-hydroxymethylfurfural to 2,5-furandicarboxaldehyde by polymeric carbon nitride-hydrogen peroxide adduct
Autores: Ilkaeva, Marina
Krivtsov, Igor
García-López, Elisa
Marcì, Giuseppe
Khainakova, Olena
García Menéndez, José Rubén
Palmisano, Leonardo
Díaz Fernández, Eva
Ordóñez García, Salvador
Fecha Edición: 3-Feb-2018
Editor: Elsevier
Cita Bibliográfica: M. Ilkaeva, I. Krivtsov, E.I. García-López, G. Marcì, O. Khainakova, J.R. García, L. Palmisano, E. Díaz, S. Ordóñez, "Selective photocatalytic oxidation of 5-hydroxymethylfurfural to 2,5-furandicarboxaldehyde by polymeric carbon nitride-hydrogen peroxide adduct", Journal of Catalysis, 359 (2018) 212–222.
Resumen: Polymeric carbon nitride-hydrogen peroxide adduct (PCN-H2O2) has been prepared, thoroughly characterised and its application for selective photocatalytic conversion of 5-hydroxymethylfurfural (HMF) to 2,5-furandicarboxaldehyde (FDC) in aqueous suspension has been studied. The PCN-H2O2 adduct is stable in aqueous suspension under UV and solar irradiation up to 100 °C. It is also stable up to 200 °C if heated in air, while at temperatures close to 300 °C its decomposition takes place. Based on the obtained characterisation data it has been proposed that H2O2 attaches to the non-polymerised carbon nitride species and to the heptazine nitrogen atoms, thus producing strong hydrogen bonding within the PCN-H2O2 adduct. The blockage of the surface amino-groups in PCN-H2O2 by H2O2 hinders the interaction of HMF with these sites, which are responsible for unselective substrate conversion. PCN-H2O2, although being less active, possesses a superior selectivity in natural solar light assisted oxidation of HMF to FDC reaching 80% with respect to its thermally etched PCN counterpart, which gives rise to a 40–50% selectivity. We believe that the exceptional performance of the applied photocatalyst in the selective photocatalytic conversion of HMF to a high added value FDC in a green solvent under natural illumination makes a significant contribution to the development of environmentally friendly technologies for biomass valorisation.
URI: https://ria.asturias.es/RIA/handle/123456789/10872
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