Facile assemble of 2D α-zirconium phosphate supported silver nanoparticles: superior and recyclable catalysis
A novel, efficient and durable ZrP@PDA/Ag nanocatalyst was prepared via facile reduction and deposition of silver nanoparticles (AgNPs) on two dimensional (2D) α-zirconium phosphate (ZrP) nanosheets using bio-inspired dopamine chemistry. The formation, adhesion and dispersion of AgNPs were confirmed by the full morphological and structural characterizations including SEM, TEM, FTIR, TGA, WXRD, and XPS. This ZrP@PDA/Ag nanocatalyst was evaluated by the reduction of 4-nitrophenol into 4-aminophenol, employing UV–vis absorption spectroscopy to monitor the reaction solution with trace silver content of 0.125 μg/mL. ZrP@PDA/Ag exhibits a superior catalytic activity compared with other noble metal nanocatalysts due to the high turnover frequency of 32.36 min-1 at room temperature without stirring, which is as high as almost 10 times of that for the reported nanocatalysts using 2D graphene and silica supports. Furthermore, the excellent catalytic recyclability of ZrP@PDA/Ag endows it a very promising prospect in the treatment of organic pollutants in water.