Fig. 10

a Time dependent UV–Visible spectra of reduction of 4-NP in the absence of catalyst [conditions: [4-NP] = 80 μM, [NaBH4] = 8 mM and temperature = 22 °C]
a Time dependent UV–Visible spectra of reduction of 4-NP in the absence of catalyst [conditions: [4-NP] = 80 μM, [NaBH4] = 8 mM and temperature = 22 °C]