Journal
RESEARCH ON CHEMICAL INTERMEDIATES
Volume 43, Issue 9, Pages 5153-5168Publisher
SPRINGER
DOI: 10.1007/s11164-017-3046-9
Keywords
Carbon nitride; Photocatalysis; 5-(Hydroxymethyl)-2-furaldehyde; Selective oxidation; Sonochemical treatment
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Carbon nitride photocatalysts have been prepared by different methodologies, such as chemical ultrasonic irradiation (sonochemical treatment), hydrothermal and ball milling and thermoexfoliation, and have been used for the selective oxidation of 5-hydroxymethyl-2-furaldehyde (HMF) to form 2,5-furandicarboxyaldehyde (FDC) in water suspension both under UV and natural solar irradiation. The physico-chemical features of the photocatalysts have been studied by X-ray diffraction, infrared spectroscopy, UV-Vis diffuse reflectance spectroscopy, photoluminescence spectroscopy, scanning electron microscopy, and specific surface area measurements. The results indicate that exfoliation of carbon nitrides can increase the conversion of HMF and the selectivity to FDC. In particular, samples exfoliated by both thermal and acidic ultrasonic irradiation treatments showed the best photocatalytic performance.
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