Figure 7From: Spontaneous synthesis of gold nanoparticles on gum arabic-modified iron oxide nanoparticles as a magnetically recoverable nanocatalystPlots of ln( A t / A 0 ) versus time for NaBH 4 -reduction of 4-NP at different GAAu-MNP amounts. [4-NP] = 1.5 × 10−4 M, [NaBH4] = 1.5 × 10−2 M, 30°C.Back to article page