Palladium Supported on Graphitic Carbon Nitride: An Efficient and Recyclable Heterogeneous Catalyst for Reduction of Nitroarenes and Suzuki Coupling Reaction

摘要: In this study, a novel platelet-like nanocatalyst, Pd/g-C3N4 with easily approachable active sites, was developed. The mesoporous graphitic carbon nitride (g-C3N4) is layered structure connected by planar amino groups, which can work as stabilizer and support for noble metal nanoparticles. palladium nanoparticles an average particle size of 3.25 nm were evenly dispersed on the surface g-C3N4 without aggregation. Detailed charaterizations reveal that there no covalent-bond interaction between Pd NPs. catalyst showed excellent catalytic activity in reduction nitroarenes NaBH4, Suzuki coupling reaction aryl halides arylboronic acids under mild conditions. 4-nitrophenol has pseudo-first-order rate constant 7.29 × 10−3 s−1, parameter 1.37 s−1 mM−1, higher than those reported literature. Furthermore, reactions processed smoothly 97.0 % isolate yield less 30 min water PEG600 additive. could be recycled five times significant loss activity, confirmed good stability catalyst.