Biosynthesis of Silver and Gold Nanoparticles Using Aqueous Extract of Codonopsis pilosula Roots for Antibacterial and Catalytic Applications

Figure 11

UV-Vis spectra (a, b) and first-order kinetics (c, d) of 4-NP by NaBH₄ in the presence of CP-AuNPs (a, c) and CP-AgNPs (b, d).

(a)

(b)

(c)

(d)