Sandwich-like MIL-100(Fe)@Pt@MIL-100(Fe) nanoparticles for catalytic hydrogenation of 4-nitrophenol

Separation and recycling of noble metal nanoparticles after catalytic reaction is critical to promote its application efficiency and cut down the cost. This work presents a facile synthesis strategy for the fabrication of sandwich-like MIL-100(Fe)@Pt@MIL-100(Fe) (denoted as S-Pt) nanoparticles with high stability and improved catalytic activity for hydrogenation of nitrophenol. MIL-100(Fe) acts as both carrier to make the catalyst easily separated and shield to protect the tiny Pt nanoparticles from leaching or aggregation during reaction. Moreover, mass transfer effect of the porous MIL-100(Fe) with its pore structure serving as nano-reactor is also benefit for promoting the catalytic efficiency.