Understanding Reaction Kinetics by Tailoring Metal Co-catalysts of the BiVO₄ Photocatalyst

Abstract

In this study, the reaction mechanisms of metal–semiconductor composites used as photocatalysts were demonstrated by first preparing bismuth vanadate (BiVO4) and then performing photodeposition of metal nanoparticles. The photocatalytic activity of metal–BiVO4 (M–BiVO4, where M = Pt, Au, Ag) composites were evaluated through dye decomposition under UV–vis irradiation. The photocatalytic efficiency was significantly enhanced after Pt deposition as compared to other M–BiVO4 composites. The size or shape of BiVO4 was not the main factor for the efficiency of Pt–BiVO4. However, a deposited Pt co-catalyst was essential for the photocatalytic decomposition of dye on the BiVO4 surface. Radical scavengers were employed to elucidate the reaction mechanism during the photocatalytic reaction with the Pt–BiVO4 composite. This study provides details on the reaction mechanism of the photocatalytic reaction on Pt at the BiVO4 surface under solar irradiation.

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

“…The monoclinic BiVO 4 microspheres [denoted as BiVO 4 (HT)] were prepared by hydrothermal reaction according to the reported process with some modification Figure a showed a scanning electron microscopy (SEM) image of the microspheres with an average width of 2.8 ± 0.47 μm.…”

“…To evaluate the photocatalytic activity of Pd–BiVO 4 (HT), a representative BiVO 4 catalyst was prepared by a reported solid-state synthesis method; the sample is denoted as BiVO 4 (SS). , The Pd-loaded BiVO 4 composite was also prepared by photodeposition of Pd nanoparticles on BiVO 4 [Pd–BiVO 4 (SS)] (Figure S7).…”

“…28−31 Although, there have been were prepared by hydrothermal reaction according to the reported process with some modification. 39 Figure 1a showed a scanning electron microscopy (SEM) image of the microspheres with an average width of 2.8 ± 0.47 μm. Transmission electron microscopy−energy-dispersive X-ray spectrometry (TEM−EDS) investigation of the obtained BiVO 4 (HT) yielded a Bi/V atomic ratio of 1:1 (Figure S1).…”

A Mitocentric View of the Main Bacterial and Parasitic Infectious Diseases in the Pediatric Population

“…S. aureus infection activates mitochondrial changes when, subsequently to phagocytosis of the bacterium, caspase-8 is activated followed by the progressive interruption of Δψm [ 107 ], ultimately leading to the production of ROS. Mitochondrial ROS generation has been shown to drive bactericidal macrophage activity against MRSA [ 108 ]. Of note, the reversible caspase-8 inhibitor, IETD-FMK, prevents disruption of Δψm and prevents CytC release from monocytes exposed to S. aureus [ 109 ].…”

“…Penetrates the bacteria and binds to the 30S and 50S ribosomal subunits, inhibiting protein synthesis [ 108 ]…”