Selective oxidation of aromatic alcohols in the presence of C3N4 photocatalysts derived from the polycondensation of melamine, cyanuric and barbituric acids

A set of C 3 N 4 samples has been prepared by using melamine, cyanuric acid and barbituric acid as the precursors. The materials were subjected both to physical and chemical characterization and were used as photocatalysts for the selective oxidation of aromatic alcohols in water suspension under UV...

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Bibliographic Details
Published in:Research on chemical intermediates 2021, Vol.47 (1), p.131-156
Main Authors: García-López, Elisa I., Abbasi, Zahra, Di Franco, Francesco, Santamaria, Monica, Marcì, Giuseppe, Palmisano, Leonardo
Format: Article
Language:English
Subjects:
Alcohol
Aldehydes
Benzyl alcohol
Carbon nitride
Catalysis
Chemistry
Chemistry and Materials Science
Cyanuric acid
Inorganic Chemistry
Irradiation
Melamine
Oxidation
Photocatalysis
Photocatalysts
Physical Chemistry
Selectivity
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Summary:A set of C 3 N 4 samples has been prepared by using melamine, cyanuric acid and barbituric acid as the precursors. The materials were subjected both to physical and chemical characterization and were used as photocatalysts for the selective oxidation of aromatic alcohols in water suspension under UV and visible irradiation. The photoactivity of the materials versus the partial oxidation of four substituted benzyl alcohols was investigated. The type and position of the substituents in the aromatic molecule influenced conversion and selectivity to the corresponding aldehyde. The presence of barbituric and cyanuric acids in the preparation method has changed the graphitic-C 3 N 4 structure, and therefore both the characteristics of the material and the ability of light to activate the surface of the photocatalyst. The most active material prepared in the presence of melamine and cyanuric acid showed a remarkable selectivity towards the aldehyde even under visible irradiation.
ISSN:0922-6168
1568-5675
DOI:10.1007/s11164-020-04330-5