PREPARATION AND MAGNETIC PROPERTIES OF COFE2O4@PANI-CHROMATE NANOCOMPOSITE WITH CORE/SHELL STRUCTURE

Q: How can I download an article?

To download an article from SID, first log in to the site, search for the article title, and click on the 'Download Article' option.

Q: How can I download an ISI article?

To download an ISI article on SID, enter the keyword or article title in the search bar, view the relevant results, click on the desired article, and select the 'Download Article' option.

Q: How can I access the SID database?

To access the SID database, visit SID.ir, create an account, and log in to access scientific resources.

Q: Is downloading articles from SID free?

Some articles on SID are available for free, while others require payment. Details are specified on the article's page.

KOOTI M.; KHARAZI P.

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Seminar Paper

Paper Information

Seminar: IRANIAN CHEMISTRY CONGRESS
Year:2013 | Issue:16

Download Full-Text

View:

133

Download:

Information Seminar Paper

Title

PREPARATION AND MAGNETIC PROPERTIES OF COFE2O4@PANI-CHROMATE NANOCOMPOSITE WITH CORE/SHELL STRUCTURE

Author(s)

KOOTI M. | KHARAZI P. | Issue Writer Certificate

Keywords

Not Registered.

Abstract

IN RECENT YEARS, CORE/SHELL STRUCTURED COMPOSITE MATERIALS HAVE DROWNED SIGNIFICANT ATTENTION BECAUSE OF THEIR POTENTIAL FOR COMBINING PROPERTIES THAT ARE DIFFICULT TO ATTAIN SEPARATELY WITH THE INDIVIDUAL COMPONENTS. CORE/SHELL MATERIALS COMPRISING OF A FERROMAGNETIC COMPONENT AND A CONDUCTING POLYMER HAVE RECENTLY BEEN INVESTIGATED IN SEVERAL STUDIES [1]. AMONG THE VARIOUS CONDUCTING POLYMERS, POLYANILINE HAS EMERGED AS THE MOST PROMISING CONDUCTING POLYMER DUE TO ITS UNIQUE PROPERTIES [2]. ON THE OTHER HAND, MAGNETIC NANOPARTICLES OF SPINEL FERRITES WERE FOCUSED BY MANY RESEARCHERS BECAUSE OF THEIR INTERESTING ELECTRICAL AND MAGNETIC PROPERTIES. CONSIDERING THESE PROPERTIES, SYNTHESIS OF VARIOUS CORE/SHELL STRUCTURED BASED ON FERRITES WHICH SHOWED HARD MAGNETIZATION ARE ONE OF THE INTERESTING RESEARCH SUBJECTS.IN THIS WORK, COBALT FERRITE (COFE2O4) NANOPARTICLES WERE PREPARED BY COMBUSTION METHOD USING GLYCINE AS A FUEL [3]. IN ORDER TOCOAT COBALT FERRITE WITH POLYANILINE AND THE SYNTHESIS OF COFE2O4@PANI WITH CHROMATE COUNTER ION, IN-SITU OXIDATIVE POLYMERIZATION OF ANILINE WITH CRO3, AS AN OXIDANT, WAS CARRIED OUT IN THE PRESENCE OF COFE2O4. THIS IS THE FIRST EXAMPLE OF PANI COATING WHICH CONTAINS CHROMATE COUNTER ION.THE AS-FABRICATED COFE2O4@PANI-CHROMATE NANOCOMPOSITE, WHICH CONTAINS CENTRAL MAGNETIC CORE WITH A STRONG RESPONSE TO EXTERNAL FIELD, WAS CHARACTERIZED BY FT-IR, XRD AND SEM TECHNIQUES. MAGNETIC CHARACTERIZATION OF THE COMPOSITE WAS CARRIED OUT USING A VIBRATING SAMPLE MAGNETOMETER. BY APPLYING THIS TECHNIQUE, MAGNETIC PARAMETERS, SUCH AS SATURATION MAGNETIZATION (MS), COERCIVITY (HC) AND REMNANT MAGNETIZATION (MR) CAN BE DEDUCED. THE MS AND MR VALUES OF THE NANOCOMPOSITE ARE LESS THAN THOSE OBTAINED FOR NAKED COFE2O4 WHILE THE HC VALUE IS HIGHER THAN THAT OF UNCOATED COFE2O4. THE INCREASED COERCIVITY (HC) VALUE OF THE NANOCOMPOSITE IS DUE TO THE SURFACE ANISOTROPY UPON COATING [4]. THE HIGH VALUE OF COERCIVITY (HC=1484.8OE) REVEALS THAT THE SYNTHESIZED COMPOSITE CAN BE CONSIDERED AS A HARD MAGNETIC MATERIAL. THIS COMPOSITE WHICH CONTAINS CHROMATE COUNTER ION WAS ALSO STUDIED FOR ITS CATALYTIC ACTIVITY FOR SOME ORGANIC AND INORGANIC REACTIONS.

Multimedia

No record.

Cites

No record.

References

No record.

Cite

Related Journal Papers

No record.

Related Seminar Papers

No record.

Related Plans