Exploration of the Antimicrobial and Catalytic Properties of Gold Nanoparticles Greenly Synthesized by Cryptolepis buchanani Roem. and Schult Extract

Figure 7

UV-visible spectra of reduction of MB by sodium borohydride in (a) the presence of AuNPs as the catalyst, (b) only NaBH₄, and (c) linear plot of MB over the time.

(a)

(b)

(c)