Fig. 1.

Catalytic reduction of p-NP to p-AP using NABH₄ and AgNPs. a Optimization of NABH₄ concentration for p-NP reduction, b reduction of p-NP in absence of AgNPs, c p-NP reduction in presence of AgNPs, d visual observation of color change from yellow (nitrophenolate) to colorless (p-AP) and e progress of reactions in the absence and presence of AgNPs