| 초록 |
This paper describes a new and one-pot protocol for mass–producible synthesis of the poly(ethylene oxide propylphosphonamidate) (PEOPPA) hydrogel containing plenty of amine/amino groups in structures. Such hydrogel has been used as a template and reducer for the synthesis of a series of noble metal nanoparticles (Au, Ag, Pd, Pt and Ru NPs) in the absence of any other reducers. The metal nanoparticle–impregnated hydrogels used as catalysts are reusable in reducing various nitroaromatics by sodium borohydride in aqueous media, and the reaction rate constants at 10, 30 and 50 °C and the activation energies with other activation parameters were calculated. The activation energy for the reduction of 2,6–dinitrophenol, 2,4–dinitrophenol, 4–nitrophenol and 2,4,6-trinitrophenol catalyzed by PEOPPA hydrogel supported AuNPs (HS–AuNP) is 35.13, 29.08, 22.03 and 32.01 kJmol–1, respectively. |
