Figure 5From: Spontaneous synthesis of gold nanoparticles on gum arabic-modified iron oxide nanoparticles as a magnetically recoverable nanocatalystTime-dependent UV/VIS absorption spectra for NaBH 4 -reduction of 4-NP catalyzed by GAAu-MNP. [Au]0 = 0.295 × 10−2 mg/mL, [4-NP] = 1.5 × 10−4 M, [NaBH4] = 1.5 × 10−2 M, 30°C.Back to article page