Facile assembly of Ag nanoparticles on H2SrTa2O7 nanosheets with improved catalytic property

As a typical noble nanomaterial, silver (Ag) nanoparticles have been widely used as a catalyst, but their performance is somewhat limited by self-aggregation. In this study, H2SrTa2O7 nanosheet-supported ultrafine Ag nanoparticles (Ag/H2SrTa2O7) were successfully synthesized, and the aggregation of Ag nanoparticles was effectively prevented. The Ag/H2SrTa2O7 catalyst exhibited excellent activity in p-nitrophenol reduction and was successfully recycled 10 times without a substantial decrease in its catalytic activity. This superior catalytic activity could be ascribed to the large surface area of H2SrTa2O7 nanosheets and the effective dispersion of Ag nanoparticles on the perovskite nanosheets. This work is important for the simple and green preparation of Ag catalysts with excellent catalytic performance on nontoxic perovskite nanosheets.