Facile fabrication of PS/Fe3O4@PANi nanocomposite particles and their application for the effective removal of Cu2+. (20th October 2017)

• Record Type: Journal Article
• Authors: Li, Yunxing; Qiu, Ji; Ye, Sunjie; Wang, Likui; Yang, Cheng; Sun, Peidong; Wang, Chuanxi
• Is Part Of: New journal of chemistry. Volume 41:Number 23(2017)
• Page Start: 14137
• Page End: 14144
• Publication Date: 2017-10-20
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/c7nj03139d
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : Herein we reported a facile approach to fabricating polystyrene/Fe3 O4 @polyaniline nanocomposite particles with high adsorption capacity and good recyclability for Cu 2+ . Abstract : This work presents a simple and straightforward approach to fabricating multifunctional nanocomposite particles which possess a core of a polystyrene (PS) particle, a transition layer of magnetic Fe3 O4 nanoparticles (NPs), and an outer shell of adsorbable polyaniline (PANi). In detail, the positively charged Fe3 O4 NPs synthesized via the chemical co-precipitation method are directly loaded onto the negatively charged surfaces of the PS particles obtained by emulsifier-free emulsion polymerization through electrostatic self-assembly; subsequently, the coating of the resultant PS/Fe3 O4 nanocomposite particles with PANi was successfully achieved by virtue of the "swelling–diffusion–interfacial-polymerization method" (SDIPM). Furthermore, the adsorption of Cu 2+ by PS/Fe3 O4 @PANi nanocomposite particles was investigated by changing the initial pH value, adsorption time, and initial concentration of the adsorbate. The adsorption data in our work follow a pseudo-second-order kinetics model and fit the Langmuir isotherm model. The PS/Fe3 O4 @PANi nanocomposite particles show that the maximum adsorption capacity is up to 181.5 mg g −1 at pH 5. More importantly, these nanocomposite particles can be easily recovered using an external magnetic field owing to the presence of Fe3 O4 NPs, and the regenerated nanocomposite particles can be repeatedly used for eight cycles without significant loss of their adsorption capacity.