Synthesis of Ni/Fe Nanoparticles Utilizing PVP–SDS Bound Micelles as a Template to Remove PCB77

Abstract

In the present study, Ni/Fe nanoparticles were synthesized using bound micelles as a template and 3, 3 0 , 4, 4 0 -tetrachlorobiphenyl (PCB77) as the target contaminant. The dual bound micelles, which are composed of polyvinylpyrrolidone (PVP) and sodium dodecyl sulfate (SDS), were found to be superior to single-component templates for the dispersion of metallic ions and thus directed the synthesis of Ni/Fe nanoparticles with improved properties. After characterization of the di®erent nanoparticles, it was found that the sustained e®ectiveness of PVP-SDS bound micelles a®orded specialized structures with two gradations of Ni/Fe nanoparticles, correlating to more active sites and higher activity. The improved activity of the Ni/Fe nanoparticles was nally exhibited by the higher ratio (99.3% in 72 h) and e±ciency (k obs of 0.0674 h À1 ) of PCB77 removal. Herein, the utilization of PVP-SDS bound micelles is proposed as a template for the improvement of iron-based nanoparticles and correlated research.

Synthesis of walnut‐like polyaniline by using polyvinyl alcohol micellar template with excellent film transmission

“…During the preparation of PANI walnuts, owing to the amphipathic nature of PVA molecule consisting of hydrophilic hydroxyl groups and hydrophobic alkyl chain, with the aid of sonication, spherical micelles of PVA molecules are easily fabricated in aqueous solution. [34][35][36][37][38] For reducing the interfacial tension between HCl solution and micelles while maintaining the stability of the latter, aniline molecules diffuse into the micellar inside. These micelles containing aniline molecules serve as the soft template to guide the polymerization of aniline.…”

“…Shaking or stirring can easily change the partial concentration and even break the well‐organized area of the newly polymerized PANI oligomers, which seriously deteriorate the nucleation and the growth of PANI molecules. During the preparation of PANI walnuts, owing to the amphipathic nature of PVA molecule consisting of hydrophilic hydroxyl groups and hydrophobic alkyl chain, with the aid of sonication, spherical micelles of PVA molecules are easily fabricated in aqueous solution 34–38 . For reducing the interfacial tension between HCl solution and micelles while maintaining the stability of the latter, aniline molecules diffuse into the micellar inside.…”