Biosynthesis of eco‐friendly and recyclable Pd/LDHs catalyst using the withered leaves extract for Suzuki coupling reaction

Abstract

The hydrotalcite-supported palladium (Pd) catalyst is prepared with a green and environmentally friendly route, introducing the extract of withered leaves as a dispersant and reducing agent (Pd/LDHs-B). Compared with the as-prepared catalyst (Pd/LDHs-P with the average diameter of 4.3 nm) using a chemical synthesis method with polyvinylpyrrolidone as a dispersant and ascorbic acid (Vc) as a reductant, the results indicate that the size of Pd nanoparticles in Pd/LDHs-B is smaller (ca. 3.6 nm). The Pd-LHDs-B (0.5 mmol‰) exhibits higher activity (98.66%) than Pd/LDHs-P (98.19%) in the Suzuki reaction of 4-bromotoluene and phenylboronic acid at 60°C for 30 min. Also, the reusability of Pd/LDHs-B is confirmed by recycling tests without a significant decrease in activity.

Biologically‐synthesised ZnO/CuO/Ag nanocomposite using propolis extract and coated on the gauze for wound healing applications

“…Nowadays, scientists have concentrated on the expansion of nanotechnology‐based drug delivery systems, which offer promising prospects for delivering the desired quantity of the drugs into target sites, in addition to cell penetration efficiency. In this respect, metallic nanoparticles (NPs) have received a great deal of interest among researchers as they offer a number of attractive characteristics, such as lower toxicity, high surface‐to‐volume ratio and super‐durability [6, 7]. Recent developments have demonstrated that zinc oxide NPs (ZnONPs) are promising candidates due to their potential to produce reactive oxygen species (ROSs), which show a major role in biological systems.…”