Figure 8
From: Glucomannan-mediated facile synthesis of gold nanoparticles for catalytic reduction of 4-nitrophenol
Absorption spectra and plots of ln A t / A 0 and A t / A 0 versus time. (a) Time-dependent UV-vis absorption spectra for catalytic reduction of 4-NP by NaBH4 in the presence of AuNPs. (b) Plots of ln (At/A0) and At/A0 versus reaction time for the reduction of 4-NP; A0 and A t were the absorption peak at 400 nm initially and at time t. Condition used throughout: [4-NP] = 0.5 × 10-4 M, [NaBH4] = 1.0 × 10-2 M, and T = 25°C.