Fig. 6. (Color online) UV-vis absorption spectra of (a) 4-NP, 4-NPI and 4-AP (b) hydrogenation of 4-NP in the presence of Na0.2WO3/Ag2O (c) hydrogenation of 4-NP in the presence of Na0.2WO3 and (d) hydrogenation of 4-NP in the presence of only NaBH4.
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