Understanding and Improving Photocatalytic Activity of Pd-Loaded BiVO₄ Microspheres: Application to Visible Light-Induced Suzuki–Miyaura Coupling Reaction

Abstract

The effective utilization of visible light is required for exploiting photocatalytic reactions in indoor and outdoor environments. In this study, Pd-supported BiVO4 microspheres (Pd–BiVO4) were prepared for visible light-induced photocatalytic reactions. Under irradiation with a white light-emitting diode, the obtained Pd–BiVO4 composite exhibited considerably improved catalytic activity for the decomposition of an organic dye compared with other BiVO4 catalysts. The Pd–BiVO4 composite was also effective for catalytic organic transformation via the visible light-induced Suzuki–Miyaura coupling reaction. The photogenerated electrons in the conduction band of BiVO4 flowed to the Pd nanoparticles and amplified cross-coupling reaction. The influence of the crystal structure and grain size of BiVO4 and the role of the deposited Pd nanoparticles were fully investigated to elucidate the visible light activity of the catalyst. This system highlights the possibility of an indoor light source with low energy density for sustainable organic transformations.

Photodeposition of Pt Nanoparticles on Co3O4 Nanocubes for Detection of Acetone at Part-Per-Billion Levels

“…However, the optimal dispersion of the metal particles on a semiconductor is still challenging for most sensing materials. Light illumination of semiconductors in the presence of metal precursors results in the reductive deposition of metal particles on the semiconductor surface, known as photodeposition . In contrast to general methods that require additional reducing agents, high temperature, or multistep processes, , the photodeposition method requires only the light irradiation.…”

“…Light illumination of semiconductors in the presence of metal precursors results in the reductive deposition of metal particles on the semiconductor surface, known as photodeposition. 39 In contrast to general methods that require additional reducing agents, high temperature, or multistep processes, 7,40 the photodeposition method requires only the light irradiation. In addition, the amount of metal nanoparticles can be easily controlled by manipulating the concentration of the metal salt, irradiation time, and irradiation intensity.…”

Phenazine‐based supramolecular photosensitizing assemblies: A “smart” selectivity control on catalytic activity of Pd(II) nanoparticles

“…The powder X‐ray diffraction (XRD) studies of the precipitates obtained after the evaporation of a solution of PPA and Pd 2+ ions in H 2 O/THF (7/3, v/v) show the peaks around 40°, 46°, 67°, and 81° corresponding to (111), (200), (220), and (311) planes of crystal face‐centered cubic ( fcc ) lattice of Pd, respectively (Supporting Information, Figure S9). [ 10b,28,29 ] The dynamic light scattering (DLS) studies confirm the average size of nanomaterial in the range of 65–78 nm (Figure S10). Furthermore, energy‐dispersive spectroscopy (EDS) mapping of PPA@Pd NPs also shows the presence of Pd (Figure S11).…”

“…[ 6 ] Homogeneous systems are easy to prepare and highly efficient; however, due to their poor recyclability, Pd 0 ‐based heterogeneous systems are preferred for economic and benign Suzuki cross‐coupled reactions. [ 7–10 ] The advantage of using Pd 0 ‐based catalytic heterogeneous system over Pd 2+ ion centered catalysts is to prevent the hydroxylation/homocoupling of arylboronic acid under aerial conditions. Nevertheless, the disadvantage of high material instability, poor selectivity, irregular structuring of Pd NPs and weak interactions between Pd 0 NPs, and the organic/inorganic support leads to poor catalytic productivity in the ambient reaction conditions.…”

Suitably Band‐aligned MOF‐Derived Ni2P/MnO2 Heterostructure with Ni(I) Coordination Surface Sites for Self‐Coupling of Aryl Halides to Biaryls

“…The photo‐redox provides an alternate, greener, and effective route for the C−C bond formation through coupling, by concentrating the suitable oxidation and reduction sites and the catalytic surface within a single entity. The light‐mediated electron excitations in the semiconductors render the reduction and oxidation centers within a heterogenous catalyst itself and hence offer services as coupling catalysts [26,27] . Previously the photo‐redox route has employed the hybrid strategies of coupling the photoredox system with a transition metal‐based catalyst to achieve the coupling effectively [28–30] .…”