Figure 7From: Catechin-capped gold nanoparticles: green synthesis, characterization, and catalytic activity toward 4-nitrophenol reduction4-NP reduction by NaBH 4 in the presence of catechin-AuNPs catalyst. (A) UV-visible spectra and (B) a plot of ln(C t /C0) as a function of time (min).Back to article page