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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.


FT-IR spectra of the Fe3O4@PPy deposits prepared under different amounts of pyrrole monomer at 160°C: (a) 0.1 mL, (b) 0.3 mL, (c) 0.5 mL.
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Figure 3: FT-IR spectra of the Fe3O4@PPy deposits prepared under different amounts of pyrrole monomer at 160°C: (a) 0.1 mL, (b) 0.3 mL, (c) 0.5 mL.

Mentions: Figure 3 shows the FT-IR spectra of the as-prepared Fe3O4@PPy samples with different amounts of pyrrole monomer. The absorption band at 583 cm-1 is attributed to Fe-O bond, the N-H stretching band of a pyrrole appears at about 3379 cm-1, a weak band at 2928 cm-1 in Figure 3b,c is due to the C-H stretching vibration absorption. Other spectra at 1650-1029 cm-1 also show the characteristic polypyrrole absorption [17]. A weak absorption at about 1620 cm-1 is assigned to the C = C ring stretching of pyrrole. The C-N ring stretching band of pyrrole occurs at 1044 cm-1. These results demonstrated that polypyrrole was synthesized.


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

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

FT-IR spectra of the Fe3O4@PPy deposits prepared under different amounts of pyrrole monomer at 160°C: (a) 0.1 mL, (b) 0.3 mL, (c) 0.5 mL.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

Figure 3: FT-IR spectra of the Fe3O4@PPy deposits prepared under different amounts of pyrrole monomer at 160°C: (a) 0.1 mL, (b) 0.3 mL, (c) 0.5 mL.
Mentions: Figure 3 shows the FT-IR spectra of the as-prepared Fe3O4@PPy samples with different amounts of pyrrole monomer. The absorption band at 583 cm-1 is attributed to Fe-O bond, the N-H stretching band of a pyrrole appears at about 3379 cm-1, a weak band at 2928 cm-1 in Figure 3b,c is due to the C-H stretching vibration absorption. Other spectra at 1650-1029 cm-1 also show the characteristic polypyrrole absorption [17]. A weak absorption at about 1620 cm-1 is assigned to the C = C ring stretching of pyrrole. The C-N ring stretching band of pyrrole occurs at 1044 cm-1. These results demonstrated that polypyrrole was synthesized.

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.