Modified Boron Nitride Nanosheets-Loaded Palladium Nanoparticles: An Air-Stable, Highly Active, and Recyclable Multiphase Catalyst for the Suzuki Reaction

Herein, the multiphase catalyst was prepared for catalytic Suzuki–Miyaura cross-coupling reactions by anchoring palladium nanoparticles on tris(pentaethylene-pentamine)triazine modified boron nitride nanosheets (BNNSs-TPEPTA-Pd). The synthesized catalysts were characterized using various spectroscopic and microscopic techniques such as Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and transmission electron microscopy (TEM), inductively coupled plasma-optical emission spectroscopy (ICP-OES). Subsequent experiments showed that BNNSs-TPEPTA-Pd is an excellent two-dimensional heterogeneous catalyst with a wide range of substrate tolerance, achieving an excellent yield of 95% within 45 min. On average, the catalyst improved the biaryl yield by about 12% and reduzced the reaction time by 4.6 h. In addition, the catalytic effect remained high after eight catalytic cycles. Graphical Abstract An efficient, stable, and recyclable heterogeneous catalyst was prepared by anchoring palladium nanoparticles on tris(pentaethylene-pentamine)triazine modified boron nitride nanosheets (BNNSs-TPEPTA-Pd). The catalyst was used in the Suzuki–Miyaura cross-coupling reaction to verify its activity.