Fabrication of Polypyrrole/Graphene Oxide Composite Nanosheets and Their Applications for Cr(VI) Removal in Aqueous Solution

Shangkun Li,Xiaofeng Lu,Ce Wang,Yanpeng Xue,Junyu Lei,Tian Zheng,Aristides Docoslis

doi:10.1371/journal.pone.0043328

Shangkun Li, Xiaofeng Lu + Show 5 more

Open Access

https://doi.org/10.1371/journal.pone.0043328

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Journal: PLoS ONE	Publication Date: Aug 22, 2012
Citations: 143	License type: CC BY 4.0

Affiliation: Jilin University

Abstract

In this paper, we report on the simple, reliable synthesis of polypyrrole (PPy)/graphene oxide (GO) composite nanosheets by using sacrificial-template polymerization method. Herein, MnO2 nanoslices were chosen as a sacrificial-template to deposit PPy, which served as the oxidant as well. During the polymerization of pyrrole on surface of GO nanosheets, MnO2 component was consumed incessantly. As a result, the PPy growing on the surface of GO nanosheets has the morphology just like the MnO2 nanoslices. This method can provide the fabrication of PPy nanostructures more easily than conventional route due to its independence of removing template, which usually is a complex and tedious experimental process. The as-prepared PPy/GO composite nanosheets exhibited an enhanced properties for Cr(VI) ions removal in aqueous solution based on the synergy effect. The adsorption capacity of the PPy/GO composite nanosheets is about two times as large as that of conventional PPy nanoparticles. We believe that our findings can open a new and effective avenue to improve the adsorption performance in removing heavy metal ions from waste water.

Highlights

The increased concern about global environment pollution problem has resulted in continuous expansion in finding available approaches to deal with heavy metal ions
The asprepared PPy/graphene oxide (GO) composite nanosheets exhibited an enhanced properties for Cr(VI) ions removal in aqueous solution based on the synergy effect
PPy nanoflowers were decorated on the surface of GO nanosheets by using MnO2 as a sacrificial template and the oxidant

Summary

Introduction

The increased concern about global environment pollution problem has resulted in continuous expansion in finding available approaches to deal with heavy metal ions. The adsorption capacity of the PPy/GO composite nanosheets is about two times as large as that of conventional PPy nanoparticles. This result proved that the formation of PPy/GO composite nanosheets was using MnO2/GO nanocomposites as templates.

Results

Conclusion