The Combination of Graphitic Carbon Nitride (gC₃N₄) and Supercritical Carbon Dioxide for Green Photooxidation of Benzylic Alcohols

Abstract The research focuses on the innovative use of graphite‐like carbon nitride (gC 3 N 4 ) catalysts along with supercritical carbon dioxide (scCO 2 ) for the green synthesis of valuable organic compounds. Having explored different synthetic routes for gC 3 N 4 and the obtained samples efficiency in the photocatalytic oxidation of benzyl alcohol with molecular oxygen in scCO 2 , we identified the most effective catalyst bearing ether linkers between layers of a graphite‐like structure. This catalyst facilitates the production of benzaldehyde and benzoic acid derivatives, highlighting the potential for sustainable industrial applications. The study's emphasis on a metal‐free catalyst and a zero‐waste process underlines its contribution to environmentally friendly chemical practices. The proposed approach offers a more sustainable and efficient alternative to traditional processes in small‐scale chemical production.