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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.


XRD diffraction patterns of the solid samples prepared under solutions: (a) 9 mL 0.06 M Na3cit aqueous solution, (b) 9 mL water.
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Figure 7: XRD diffraction patterns of the solid samples prepared under solutions: (a) 9 mL 0.06 M Na3cit aqueous solution, (b) 9 mL water.

Mentions: In order to study the effects of Na3cit on the structure of the product, different amounts of Na3cit were used and other experimental conditions kept the same in the reaction systems. Figure 7 shows XRD patterns of the as-prepared samples under 9 mL 0.06 M Na3cit aqueous solution and 9 mL water instead of the 9 mL 0.1 M Na3cit aqueous solution as described in the "Experimental" section, respectively. When the amount of the Na3cit was decreased from 9 mL 0.1 M to 9 mL 0.06 M Na3cit aqueous solution, pure Fe3O4 was also obtained as shown in Figure 7a. When no Na3cit was added into the solution, almost pure α-Fe2O3 was produced as shown in Figure 7b. These results demonstrated that the Na3cit was used as the reducing reagent to form Fe3O4.


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

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

XRD diffraction patterns of the solid samples prepared under solutions: (a) 9 mL 0.06 M Na3cit aqueous solution, (b) 9 mL water.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

Figure 7: XRD diffraction patterns of the solid samples prepared under solutions: (a) 9 mL 0.06 M Na3cit aqueous solution, (b) 9 mL water.
Mentions: In order to study the effects of Na3cit on the structure of the product, different amounts of Na3cit were used and other experimental conditions kept the same in the reaction systems. Figure 7 shows XRD patterns of the as-prepared samples under 9 mL 0.06 M Na3cit aqueous solution and 9 mL water instead of the 9 mL 0.1 M Na3cit aqueous solution as described in the "Experimental" section, respectively. When the amount of the Na3cit was decreased from 9 mL 0.1 M to 9 mL 0.06 M Na3cit aqueous solution, pure Fe3O4 was also obtained as shown in Figure 7a. When no Na3cit was added into the solution, almost pure α-Fe2O3 was produced as shown in Figure 7b. These results demonstrated that the Na3cit was used as the reducing reagent to form Fe3O4.

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.