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Figure 3 | Nanoscale Research Letters

Figure 3

From: Glucomannan-mediated facile synthesis of gold nanoparticles for catalytic reduction of 4-nitrophenol

Figure 3

UV-vis absorption spectra for AuNPs. (a) Under optimized conditions: 0.89 mM HAuCl4 and 0.22 wt% KGM in NaOH solution at 50°C for 3 h. (b) In the absence of NaOH, with other conditions the same as in (a). (c) With 0.89 mM HAuCl4 and 0.22 wt% KGM in NaOH solution at 25°C for 12 h. (d) AuNPs synthesized with 0.89 mM HAuCl4 and 0.1 wt% KGM in NaOH solution at 50°C for 3 h.

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