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Preparation of stable magnetic nanofluids containing Fe3O4@PPy nanoparticles by a novel one-pot route.

Zhao B, Nan Z - Nanoscale Res Lett (2011)

Bottom Line: Trisodium citrate (Na3cit) was used as the reducing reagent to form Fe3O4 NPs.The Fe3O4@PPy NPs can still keep dispersing well after the nanofluid has been standing for 1 month and no sedimentation is found.The as-prepared Fe3O4@PPy NPs exhibit superparamagnetic behavior.

View Article: PubMed Central - HTML - PubMed

Affiliation: College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002, People's Republic of China. zdnan@yzu.edu.cn.

ABSTRACT
Stable magnetic nanofluids containing Fe3O4@Polypyrrole (PPy) nanoparticles (NPs) were prepared by using a facile and novel method, in which one-pot route was used. FeCl3·6H2O was applied as the iron source, and the oxidizing agent to produce PPy. Trisodium citrate (Na3cit) was used as the reducing reagent to form Fe3O4 NPs. The as-prepared nanofluid can keep long-term stability. The Fe3O4@PPy NPs can still keep dispersing well after the nanofluid has been standing for 1 month and no sedimentation is found. The polymerization reaction of the pyrrole monomers took place with Fe3+ ions as the initiator, in which these Fe3+ ions remained in the solution adsorbed on the surface of the Fe3O4 NPs. Thus, the core-shell NPs of Fe3O4@PPy were obtained. The particle size of the as-prepared Fe3O4@PPy can be easily controlled from 7 to 30 nm by the polymerization reaction of the pyrrole monomers. The steric stabilization and weight of the NPs affect the stability of the nanofluids. The as-prepared Fe3O4@PPy NPs exhibit superparamagnetic behavior.

No MeSH data available.


TEM image of the solid sample prepared with 9 mL 0.06 M Na3cit aqueous solution.
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Figure 8: TEM image of the solid sample prepared with 9 mL 0.06 M Na3cit aqueous solution.

Mentions: The size and shape of the product prepared in 9 mL 0.06 M Na3cit aqueous solution were determined by TEM as shown in Figure 8, in which the mean diameter of the particles is about 30 nm. Compared with the product prepared in 9 mL 0.1 M Na3cit aqueous solution as shown in Figure 4b, the size of the sample increased from 7 to 30 nm with the decrease of the amount of Na3cit in the solution. These results were in agreement with references [20,21], in which Na3cit was used as a dispersant.


Preparation of stable magnetic nanofluids containing Fe3O4@PPy nanoparticles by a novel one-pot route.

Zhao B, Nan Z - Nanoscale Res Lett (2011)

TEM image of the solid sample prepared with 9 mL 0.06 M Na3cit aqueous solution.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211289&req=5

Figure 8: TEM image of the solid sample prepared with 9 mL 0.06 M Na3cit aqueous solution.
Mentions: The size and shape of the product prepared in 9 mL 0.06 M Na3cit aqueous solution were determined by TEM as shown in Figure 8, in which the mean diameter of the particles is about 30 nm. Compared with the product prepared in 9 mL 0.1 M Na3cit aqueous solution as shown in Figure 4b, the size of the sample increased from 7 to 30 nm with the decrease of the amount of Na3cit in the solution. These results were in agreement with references [20,21], in which Na3cit was used as a dispersant.

Bottom Line: Trisodium citrate (Na3cit) was used as the reducing reagent to form Fe3O4 NPs.The Fe3O4@PPy NPs can still keep dispersing well after the nanofluid has been standing for 1 month and no sedimentation is found.The as-prepared Fe3O4@PPy NPs exhibit superparamagnetic behavior.

View Article: PubMed Central - HTML - PubMed

Affiliation: College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002, People's Republic of China. zdnan@yzu.edu.cn.

ABSTRACT
Stable magnetic nanofluids containing Fe3O4@Polypyrrole (PPy) nanoparticles (NPs) were prepared by using a facile and novel method, in which one-pot route was used. FeCl3·6H2O was applied as the iron source, and the oxidizing agent to produce PPy. Trisodium citrate (Na3cit) was used as the reducing reagent to form Fe3O4 NPs. The as-prepared nanofluid can keep long-term stability. The Fe3O4@PPy NPs can still keep dispersing well after the nanofluid has been standing for 1 month and no sedimentation is found. The polymerization reaction of the pyrrole monomers took place with Fe3+ ions as the initiator, in which these Fe3+ ions remained in the solution adsorbed on the surface of the Fe3O4 NPs. Thus, the core-shell NPs of Fe3O4@PPy were obtained. The particle size of the as-prepared Fe3O4@PPy can be easily controlled from 7 to 30 nm by the polymerization reaction of the pyrrole monomers. The steric stabilization and weight of the NPs affect the stability of the nanofluids. The as-prepared Fe3O4@PPy NPs exhibit superparamagnetic behavior.

No MeSH data available.