Self-assembly of L-cysteine–Ag–Au Nanoparticles for catalytic reductionof ۴-nitrophenols

Rapid industrialization in recent years is primarily one of the main causes of environmentalconcerns, especially water pollution. Various industries have caused many dangerous diseases forhumans and aquatic animals. Among organic pollutants, Nitrophenol compounds as commoncarcinogenic pollutants demonstrate adverse effects on human beings and aquatic life. Chemicalreduction of nitrophenols is known as the advanced removal methodology for such hazardous dyesfrom aqueous reservoirs. In recent years, researchers have used different nanocatalytic systems forthe chemical reduction of nitrophenols to a useful reduction product of aminophenol using sodiumborohydride (NaBH۴) as the reducing agent. The hierarchically organized particles (Hops) areinorganic or hybrid particles with hierarchically organized nanostructures such as spiky, sheets,and helices. In addition, Au and Ag Hops which are gold, and silver complexes with cysteine as aligand have been shown to have structurally ordered and porous structures and are beneficial forrecycling. In this study, hierarchical self-assembly of Au-Ag fractal patterns was achieved using ahydrothermal method using L-cysteine as an environmentally friendly reducing and stabilizingreagent. Here, free thiol groups of cysteine molecules electrostatically immobilized gold and silvernanoparticles (NPs). Polymeric material-supported bimetallic nanoparticles were used as catalystsfor the degradation of ۴-nitrophenol to ۴- ۴-aminophenol

کلیدواژه ها:

Gold ، Silver ، L-cysteine ، ۴-nitrophenol ، Sodium Borohydride