A Comparison Study of the Catalytic Properties of Au-based Nanoflowers and Nanoparticles

To explore the catalytic activity of gold nanoparticles in this paper is demostrated. With sodium borohydride as the hydrogen donor, the catalytic reaction based on the reduction of p-nitrophenol by synthesized AuNFs or AuNPs was carried out at the different temperature. The results show that the reaction temperature was negatively correlated with the time. At 50℃, the reaction time of AuNFs was 7 min; at 37℃, AuNFs was 15 min; at 20℃, AuNFs was 45 min. The reaction was first order kinetics. And the E_a value of AuNFs was 37. 97 kJ/mol, smaller than AuNPs' 51. 51 kJ/mol. The catalytic activity of AuNFs is stronger than that of AuNPs.