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

Krivtsov, Igor; García‐López, Elisa I.; Marcı̀, Giuseppe; Palmisano, Leonardo; Amghouz, Zakariae; Garcı́a, José R.; Ordóñez, Salvador; Dı́az, Eva

doi:10.1016/j.apcatb.2016.11.049

Cited by 166 publications

(149 citation statements)

References 43 publications

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“…Recently, the enhanced selectivity of PCN for aqueous phase HMF to FDC photo-oxidation with respect to that previously achieved in the presence of TiO2 [25] has been reported [39][40]. A detrimental effect of the presence of nonpolymerised carbon nitride species on the selectivity of photo-oxidation has also been observed [39]. Thermal etching applied to bulk PCN, principally with the purpose of increasing its specific surface area (SSA), also eliminated excessive NH and NH2 moieties from the PCN surface resulting in the growth of selectivity toward the FDC production from 30% to 50% under solar irradiation [39].…”

Section: Introductionmentioning

confidence: 92%

“…Despite this attractive property, this material has mostly been used for conversion of aromatic alcohols [29][30][31][32] and hydrocarbons [33][34][35][36] in organic solvents, while reports on its performance in aqueous phase are scarce [37][38]. Recently, the enhanced selectivity of PCN for aqueous phase HMF to FDC photo-oxidation with respect to that previously achieved in the presence of TiO2 [25] has been reported [39][40]. A detrimental effect of the presence of nonpolymerised carbon nitride species on the selectivity of photo-oxidation has also been observed [39].…”

Section: Introductionmentioning

confidence: 99%

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Selective photocatalytic oxidation of 5-hydroxymethylfurfural to 2,5-furandicarboxaldehyde by polymeric carbon nitride-hydrogen peroxide adduct

Ilkaeva

Krivtsov

García‐López

et al. 2018

Journal of Catalysis

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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 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.

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Section: Introductionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Selective photocatalytic oxidation of 5-hydroxymethylfurfural to 2,5-furandicarboxaldehyde by polymeric carbon nitride-hydrogen peroxide adduct

Ilkaeva

Krivtsov

García‐López

et al. 2018

Journal of Catalysis

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“…The relatively low specific surface areas (SSA) of the g-C3N4 obtained by using thiourea or melamine as the precursors, have been reported in the range 4-7 m 2 ×g -1 , whilst values close to 70 m 2 ×g -1 have been obtained for samples prepared at high condensation temperatures, although the yields were very low [37]. There are two general ways to increase the SSA of g-C3N4, i.e.…”

Section: Figure 2 Ftir Spectramentioning

confidence: 99%

“…These facts indicate that the presence of P reduced the oxidant ability of the pristine g-C3N4. It is known that the formation of superoxide • O2radical species accounts for the oxidant ability of C3N4 in the partial oxidation photocatalytic process [37]. The formation of these species is due to trapping of the photoproduced electrons by O2.…”

Section: Tablementioning

confidence: 99%

Selective photocatalytic oxidation of aromatic alcohols in water by using P-doped g-C3N4

Bellardita

García‐López

Marcı̀

et al. 2018

Applied Catalysis B: Environmental

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247

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A set of bare and P-doped graphitic carbon nitride (g-C3N4) photocatalysts has been prepared by thermal condensation of melamine, urea or thiourea. For the sake of comparison, a g-C3N4 sample obtained in the presence of cyanuric acid and thermally exfoliated C3N4 powders were also studied. The materials were physicochemically characterized and their photocatalytic activity was studied for the selective oxidation of benzyl alcohol (BA), 4-methoxy benzyl alcohol (4-MBA) and piperonyl alcohol (PA) in water suspension both under UV and visible light irradiation. The influence of the type and position of the substituents on conversion and selectivity to aldehyde was remarkable. The presence of P in the C3N4 material improved the selectivity of the reaction towards the aldehyde.

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“…O 2 − is believed as the key active specie for this process. This result is in agreement with the reports by Krivtsov's group using the same catalyst . The group also tested the catalyst under the natural sunlight and in solar pilot plant, which yields high FDC selectivity, highlighting the plausibility to apply this technology in practical conditions .…”

Section: Photobiorefinery Routes For Chemical Productionmentioning

confidence: 99%

Beyond Artificial Photosynthesis: Prospects on Photobiorefinery

et al. 2020

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Artificial photosynthesis (AP) technology which integrates solar energy harvesting and chemical conversion process into one device is a promising solution to both global energy and environmental crises. Despite decades of research, AP for solar hydrogen production and CO2 reduction remains in the technological infancy. The low profit margins of the targeted products, the highly energy‐intensive process, and the engineering impracticality have kept AP technology in the laboratory demonstration stage. Photobiorefinery, a photocatalytic process for biomass valorization, has emerged as a new promising application for AP technology. This process offers high‐value products, requires less energy, and potentially could utilize AP process to enhance selectivity. In this Minireview, the recent progress in photocatalytic biomass depolymerization, partial oxidation, hydrogenolysis, and hydrogenation are featured. Challenges and prospects of the photocatalytic biomass valorization towards commercialization are also discussed.

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

Cited by 166 publications

References 43 publications

Selective photocatalytic oxidation of 5-hydroxymethylfurfural to 2,5-furandicarboxaldehyde by polymeric carbon nitride-hydrogen peroxide adduct

Selective photocatalytic oxidation of 5-hydroxymethylfurfural to 2,5-furandicarboxaldehyde by polymeric carbon nitride-hydrogen peroxide adduct

Selective photocatalytic oxidation of aromatic alcohols in water by using P-doped g-C3N4

Beyond Artificial Photosynthesis: Prospects on Photobiorefinery

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