Figure 8From: 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 initial concentrations of 4-NP. [Au]0 = 0.295 × 10−2 mg/mL, [NaBH4]/[4-NP] = 100, 30°C.Back to article page