Preparation of bimetallic nanoparticles supported on graphitic carbon nitride and evaluation of their catalytic activity on benzylic C-H bond oxidation

Abstract

Benzylic C-H bond oxidation is a reaction of high importance and endless possibility of use for reasons such as the convenience of various synthesis. Heterogeneous catalysts for oxidation have been improved as importance of the reaction. Graphitic carbon nitride(g-C3N4) is a heterogeneous catalyst or its supporting material that is nowadays spotlighted in reactions involve radical for its semiconductive properties, stability, and environment-friendly properties. Several studies have been confirmed to add metal nanoparticle on it to increase the efficiency of the catalyst, and it is common to confirm that it is better when a bimetallic alloy is introduced than the case made of a single metal. In this research, bimetallic graphitic carbon nitride nanoparticles(M1M2/g-C3N4), which manganese, iron, cobalt, nickel, copper, zinc, palladium, silver, and gold were combined were synthesized and screened for benzylic C-H oxidation. CoCu/g-C3N4 was confirmed to the best catalyst for the reaction, and characterization occurred with XPS and XRD. Reaction conditions were fixed that using oxygen for oxidant and NHPI as radical mediator, and with the fixed conditions, 12 substrates were tested to show the applicability of the catalyst.