Facilitating a high‐performance photocatalyst for Suzuki reaction: Palladium nanoparticles immobilized on reduced graphene oxide‐doped graphitic carbon nitride

Abstract

We prepared a non-covalently coupled hybrid of reduced graphene oxide (rGO)-doped graphitic carbon nitride (g-C 3 N 4 ) by freezing-assisted assembly and calcination. Fourier transform infrared, Raman and X-ray photoelectron spectroscopies and transmission electron microscopy confirmed that rGO was incorporated into the bulk g-C 3 N 4 , which was an ideal support for loading Pd nanoparticles. The Pd nanoparticles with an average size of 4.57 nm were uniformly dispersed on the rGO-doped g-C 3 N 4 surface. The layered structure provided large contact area of g-C 3 N 4 with rGO, further accelerating the electron transfer rate and inhibiting electron-hole recombination. Consequently, compared with Pd/rGO/g-C 3 N 4 and Pd/g-C 3 N 4 , the Pd/rGO-doped g-C 3 N 4 showed a prominent catalytic activity for visible-light-driven photocatalytic Suzuki-Miyaura coupling at ambient temperature. The Pd/rGO-doped g-C 3 N 4 exhibited very high stability after six consecutive cycles with minimal loss of catalytic activity.

CuO@Ag/NH2-MIL-88B(Fe) Heterojunction Photocatalyst for the Photothermal Codriven Synthesis of Benzimidazoles and Biaryls

“…The Suzuki−Miyaura C−C coupling reaction has received much attention to be carried out via light-induced synthetic methods. 41 Palladium (Pd) as a catalyst has widely been explored by supporting on the surface of MOFs (e.g., UiO-66-NH 2 @cyanuric chloride@2-aminopyrimidine/Pd NPs) 42 and porous polymers (e.g., polycarbazole/Pd), 43 organic (e.g., Pd/ rGO-doped g-C 3 N 4 ), 44 and inorganic (e.g., NiFe 2 O 4 /MoS 2 -Pd) 45 two-dimensional materials, and nanoparticles (e.g., NiFe 2 O 4 @TiO 2 @PDA-Pd). 46 Since surface plasmon resonance can stimulate the photocatalytic activity, 41 Pd-based catalysts have been modified by alloying with gold (e.g., HUY@S-TOH@AuPd) 47 to generate bimetallic systems.…”