Preparation and Catalytic Performance of Porous Magnetically Recyclable Fe3o4@Zif-8@Cux/Pdy Catalyst

Abstract

Magnetic catalysts are increasingly recognized for their potential in promoting efficient recycling processes. In our research, we developed a series of Fe3O4@ZIF-8@Cux/Pdy magnetic catalysts through an environmentally friendly synthesis approach. By incorporating Fe3O4, we achieved strong magnetic properties that facilitate straightforward recycling of the catalysts. Additionally, the ZIF structure on the surface substantially increases the specific surface area, thereby improving the available reaction space. The catalytic activity is largely attributed to the Cu/Pd component, which serves as the active site. 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. Our findings indicate that optimal catalytic activity occurs with 0.1 mmol of Cu and 0.07 mmol of Pd, which the reaction time was just 80 seconds, yielding a rate constant (k) of 0.0513 s-1. This formulation demonstrated superior catalytic performance, and more importantly, it has the absolute advantage of convenient recycling.

Keywords: MOF, Magnetic catalyst, Nano material