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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.


Pictures of the nanofluids containing Fe3O4@PPy NPs standing for various times prepared under different amounts of pyrrole monomer at 160°C: (A) Commencement, (B) 1 h, (C) 4 h, (D) 1 week; (a) 0.1 mL, (b) 0.3 mL, (c) 0.5 mL.
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Figure 1: Pictures of the nanofluids containing Fe3O4@PPy NPs standing for various times prepared under different amounts of pyrrole monomer at 160°C: (A) Commencement, (B) 1 h, (C) 4 h, (D) 1 week; (a) 0.1 mL, (b) 0.3 mL, (c) 0.5 mL.

Mentions: Well-dispersed nanofluid can be prepared as shown in Figure 1A(b). The nanoparticles can still keep dispersing well after the nanofluid has been standing for 1 week and no sedimentation was observed as shown in Figure 1D(b), in which the nanoparticles were synthesized with 0.3 mL pyrrole monomer. This kind of nanofluid can be stable for more than 1 month. In order to investigate the effect of amount of pyrrole monomer on stability of the nanofluid, various amounts of pyrrole were added into the reaction system. Figure 1a,c shows the nanofluids with 0.1 and 0.5 mL pyrrole, respectively. Sedimentations can be clearly found after the nanofluids have been standing for 1 and 4 h as shown in Figure 1B(a, c) and 1C(a, c), respectively. When no pyrrole was added into the reaction solution, no stable was prepared (the figure is not shown here). These results proved that the most stable nanofluid was produced with 0.3 mL pyrrole.


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

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

Pictures of the nanofluids containing Fe3O4@PPy NPs standing for various times prepared under different amounts of pyrrole monomer at 160°C: (A) Commencement, (B) 1 h, (C) 4 h, (D) 1 week; (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 1: Pictures of the nanofluids containing Fe3O4@PPy NPs standing for various times prepared under different amounts of pyrrole monomer at 160°C: (A) Commencement, (B) 1 h, (C) 4 h, (D) 1 week; (a) 0.1 mL, (b) 0.3 mL, (c) 0.5 mL.
Mentions: Well-dispersed nanofluid can be prepared as shown in Figure 1A(b). The nanoparticles can still keep dispersing well after the nanofluid has been standing for 1 week and no sedimentation was observed as shown in Figure 1D(b), in which the nanoparticles were synthesized with 0.3 mL pyrrole monomer. This kind of nanofluid can be stable for more than 1 month. In order to investigate the effect of amount of pyrrole monomer on stability of the nanofluid, various amounts of pyrrole were added into the reaction system. Figure 1a,c shows the nanofluids with 0.1 and 0.5 mL pyrrole, respectively. Sedimentations can be clearly found after the nanofluids have been standing for 1 and 4 h as shown in Figure 1B(a, c) and 1C(a, c), respectively. When no pyrrole was added into the reaction solution, no stable was prepared (the figure is not shown here). These results proved that the most stable nanofluid was produced with 0.3 mL pyrrole.

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.