Kinetics of p-nitrophenol reduction by copper - porous silicon catalyst in the presence of KBH4

Copper supported on porous silicon (Cu-PS) was prepared via deposition of Cu° on the surface of chemically etched PS powder. The particle size of Cu° varied with the Cu content in Cu-PS. The distribution of Cu° in or around the pores of PS resulted in a lower BET surface area and pore size of the Cu-PS as compared to pristine PS. Catalytic efficiency of Cu-PS was evaluated for the reduction of p-nitrophenol (p-NP). Optimum conditions were achieved when 0.77 wt% Cu-PS and 25.00 mg KBH₄ was used. Cu-PS also exhibit sustainable catalytic activity.