Micro/nano-structured polyaniline/silver catalyzed borohydride reduction of 4-nitrophenol

Abstract

Micro/nano-structured polyaniline/Ag composites with different morphologies were prepared. The composites were applied as a catalyst in the borohydride reduction reaction of 4-nitrophenol and showed comparable catalytic performance.

Synthesis of novel poly(1‐naphthylamine)‐silver nanocomposites and its catalytic studies on reduction of 4‐nitrophenol and methylene blue

“…The rate constant calculated for PNA‐20Ag catalyzed reduction of 4‐NP with sodium borohydride is 0.2987 min −1 . Considerable enhancement in catalytic activity is observed, which is comparable or better than the catalytic activity reported recently by different groups with metal or metal oxide heterogeneous catalysts …”

“…Noble metal nanoparticles are excellent candidates as nanofillers for the fabrication of CP based functional composites due to their unique optoelectronic properties, special surface characteristics, and outstanding catalytic and sensing performance . The improved catalytic and sensing performance of CP‐silver nanocomposite is attributed to the increased effective contact area and active sites resulted from the synergistic interfacial and electrochemical interactions between the matrix components . Among the noble metal particles, silver nanoparticles (AgNPs) are superior because of their low cost, high conductivity, high activity, and nontoxicity …”

“…Incorporating AgNPs into highly porous CP matrix inhibited nanoparticle clustering ensuring even dispersion and better stabilization of nano metal particles. Additionally, the distribution of colloidal AgNPs on CPs provides a green and cost‐effective route of heterogeneous catalysis and prevents silver leaching thus, improving stability, activity, and reproducibility …”

“…Even if, different physical and chemical methods have been adopted for the removal of toxic contaminants like methylene blue (MB) and 4‐nitrophenol (4‐NP), transforming them into chemically less stable and less toxic reduced forms enable an alternative way for effective management of such contaminants . Recent studies report that such reductive degradation of organic pollutants can be successfully carried out in the presence of noble metal nanoparticles supported conducting polymers composites …”

Synthesis of silver-anchored polyaniline–chitosan magnetic nanocomposite: a smart system for catalysis

“…Generally, reducing agents such as hydrazine and sodium citrate were used for anchoring silver nanoparticles over some surfaces. 43 These reductants may cause many problems such as toxicity of a product. 44 In the present study, silver ions were reduced via PANI to silver nanoparticles onto the nanocomposite surface.…”