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

Novel Pd/rGO ‐doped g‐C3N4 was prepared and used as an outstanding visible ‐light‐driven photocatalyst for Suzuki–Miyaura coupling reactions. The hybrid catalyst could be recycled using simple filtration and reused, while keeping similar catalytic activity for six successive reactions. We prepared a non ‐covalently coupled hybrid of reduced graphene oxide (rGO)‐doped graphitic carbon nitride (g‐C3N4) 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‐C3N4, 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‐C3N4 surface. The layered structure provided large contact area of g ‐C3N4 with rGO, further accelerating the electron transfer rate and inhibiting electron –hole recombination. Consequently, compared with Pd/rGO/g‐C3N4 and Pd/g ‐C3N4, the Pd/rGO ‐doped g‐C3N4 showed a prominent catalytic activity for visible ‐light‐driven photocatalytic Suzuki–Miyaura coupling at ambient temperature. The Pd/rGO‐doped g‐C3N4 exhibited very high stability after six consecutive cycles with minimal loss of catalytic activity.

Source: Applied Organometallic Chemistry - October 30, 2018 Category: Chemistry Authors: Xiaohua Zhao, Jiateng Xie, Xin Liu, Xiang Liu Tags: FULL PAPER Source Type: research