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Journal of Photocatalysis

Author(s): Elisa I. García-López*, Giuseppe Marcì, Marina Ilkaeva, Filippo Saiano and Leonardo Palmisano

DOI: 10.2174/2665976X01666191127152926

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Photocatalytic Partial Oxidation of 5-hydroxymethyl-2-furfural Under UV and Natural Solar Irradiation in Aqueous Suspension of K Containing C3N4

Page: [16 - 29] Pages: 14

  • * (Excluding Mailing and Handling)

Abstract

Background: The influence of the potassium metal cation on the graphitic carbon nitride (g-C3N4) photocatalyst has been studied in the partial oxidation of 5-hydroxymethyl-2-furfural (HMF) to 2,5-furandicarboxaldehyde (FDC).

Objective: The aim of this study was to understand if the presence of K in C3N4 could increase the oxidative conversion of HMF to high added value species.

Methods: Two sets of photocatalysts were prepared by following two different methodologies. In both series of the materials, the precursor of C3N4 was melamine with different types of the K containing species including KCl and KOH in one case and KNO3 alone in the other case. However, for both series of photocatalysts, materials were prepared with different amounts of potassium.

Results: The results obtained by using materials prepared by the two different methodologies indicate that in both cases the presence of K was almost irrelevant at least for the lower amounts of potassium content. On the contrary, its presence was beneficial for the activity versus the photocatalytic partial oxidation reaction of the alcohol for the highest K content.

Conclusion: Some of the prepared K containing g-C3N4 materials showed increased photocatalytic activity for the partial oxidation reaction of HMF in water, particularly by using natural solar light as the irradiation source.

Keywords: Photocatalysis, carbon nitride, partial photocatalytic oxidation, 5-hydroxymethyl-2-furfural, 2, 5-furandicarboxaldehyde (FDC), graphitic carbon.

Graphical Abstract

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