Preparation and catalytic performance of porous magnetically recyclable Fe3O4@ZIF-8@Cux/Pdy catalyst

Magnetic catalysts are increasingly recognized for their potential in promoting efficient recycling processes. In this study, a series of Fe 3 O 4 @ZIF-8@Cu x /Pd y magnetic catalysts were fabricated through an environmentally - friendly synthetic route. The inclusion of Fe 3 O 4 imparts robust magnetic properties to the catalysts, thereby facilitating their facile separation and recycling. Meanwhile, the ZIF-8 structure on the surface remarkably enlarges the specific surface area , providing more available reaction sites. The catalytic activity is predominantly ascribed to the Cu/Pd component, which functions as the active center. To investigate the microstructure and crystal structure of the catalysts, we employed various analytical techniques, including TEM , XRD , and XPS et al. The model reaction 4-nitrophenol (4-NP) reduction to 4-aminophenol (4-AP) was employed to assess the catalyst's performance. The results revealed that the optimal catalytic activity was achieved when the catalyst contained 0.1 mmol of Cu and 0.07 mmol of Pd , which the reaction was completed within merely 80 s, with a rate constant (k) of 0.0513 s −1 . This formulation not only demonstrated excellent catalytic performance but also held a distinct advantage in terms of convenient recyclability, which is of great significance for practical applications. • The Fe 3 O 4 @ZIF-8@Pd perform good catalytic activity, and the addition of Cu further optimized the activity. • Fe 3 O 4 @ZIF-8@Cu/Pd hybrid materials were prepared by a simple aqueous process. • The Fe 3 O 4 component endows the catalyst with recyclability.