Limits...
Magnesium Ferrite (MgFe2O4) Nanostructures Fabricated by Electrospinning

Maensiri S, Sangmanee M, Wiengmoon A - (2008)

Bottom Line: Magnesium ferrite (MgFe(2)O(4)) nanostructures were successfully fabricated by electrospinning method.Room temperature magnetization results showed a ferromagnetic behavior of the calcined MgFe(2)O(4)/PVP composite nanofibers, having their specific saturation magnetization (M(s)) values of 17.0, 20.7, 25.7, and 31.1 emu/g at 10 Oe for the samples calcined at 500, 600, 700, and 800 degrees C, respectively.It is found that the increase in the tendency of M(s) is consistent with the enhancement of crystallinity, and the values of M(s) for the MgFe(2)O(4) samples were observed to increase with increasing crystallite size.

View Article: PubMed Central - HTML - PubMed

ABSTRACT

Magnesium ferrite (MgFe(2)O(4)) nanostructures were successfully fabricated by electrospinning method. X-ray diffraction, FT-IR, scanning electron microscopy, and transmission electron microscopy revealed that calcination of the as-spun MgFe(2)O(4)/poly(vinyl pyrrolidone) (PVP) composite nanofibers at 500-800 degrees C in air for 2 h resulted in well-developed spinel MgFe(2)O(4) nanostuctures. The crystal structure and morphology of the nanofibers were influenced by the calcination temperature. Crystallite size of the nanoparticles contained in nanofibers increased from 15 +/- 4 to 24 +/- 3 nm when calcination temperature was increased from 500 to 800 degrees C. Room temperature magnetization results showed a ferromagnetic behavior of the calcined MgFe(2)O(4)/PVP composite nanofibers, having their specific saturation magnetization (M(s)) values of 17.0, 20.7, 25.7, and 31.1 emu/g at 10 Oe for the samples calcined at 500, 600, 700, and 800 degrees C, respectively. It is found that the increase in the tendency of M(s) is consistent with the enhancement of crystallinity, and the values of M(s) for the MgFe(2)O(4) samples were observed to increase with increasing crystallite size.

Show MeSH
An electrospinning system (left) and schematic diagram of electrospinning set up (right)
© Copyright Policy
Related In: Results  -  Collection


getmorefigures.php?pmc=2893898&rFormat=json&query=null&req=5

Figure 1: An electrospinning system (left) and schematic diagram of electrospinning set up (right)

Mentions: The prepared polymer solution was loaded into a plastic syringe equipped with a 22-gauge needle made of stainless steel. The electrospinning process was carried out using our home-made electrospinning system. The electrospinning system and schematic diagram of electrospinning process are shown in Fig. 1. The needle was connected to a high-voltage supply and for each solution the voltage of 15 kV was applied. The solution was fed at a rate of 0.5 mL/h using a motor syringe pump. A piece of flat aluminum foil was placed 15 cm below the tip of the needle, and used to collect the nanofibers. All electrospinning processes were carried out at room temperature.

Magnesium Ferrite (MgFe2O4) Nanostructures Fabricated by Electrospinning

Maensiri S, Sangmanee M, Wiengmoon A - (2008)

An electrospinning system (left) and schematic diagram of electrospinning set up (right)
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?pmc=2893898&rFormat=json&query=null&req=5

Figure 1: An electrospinning system (left) and schematic diagram of electrospinning set up (right)
Mentions: The prepared polymer solution was loaded into a plastic syringe equipped with a 22-gauge needle made of stainless steel. The electrospinning process was carried out using our home-made electrospinning system. The electrospinning system and schematic diagram of electrospinning process are shown in Fig. 1. The needle was connected to a high-voltage supply and for each solution the voltage of 15 kV was applied. The solution was fed at a rate of 0.5 mL/h using a motor syringe pump. A piece of flat aluminum foil was placed 15 cm below the tip of the needle, and used to collect the nanofibers. All electrospinning processes were carried out at room temperature.

Bottom Line: Magnesium ferrite (MgFe(2)O(4)) nanostructures were successfully fabricated by electrospinning method.Room temperature magnetization results showed a ferromagnetic behavior of the calcined MgFe(2)O(4)/PVP composite nanofibers, having their specific saturation magnetization (M(s)) values of 17.0, 20.7, 25.7, and 31.1 emu/g at 10 Oe for the samples calcined at 500, 600, 700, and 800 degrees C, respectively.It is found that the increase in the tendency of M(s) is consistent with the enhancement of crystallinity, and the values of M(s) for the MgFe(2)O(4) samples were observed to increase with increasing crystallite size.

View Article: PubMed Central - HTML - PubMed

ABSTRACT

Magnesium ferrite (MgFe(2)O(4)) nanostructures were successfully fabricated by electrospinning method. X-ray diffraction, FT-IR, scanning electron microscopy, and transmission electron microscopy revealed that calcination of the as-spun MgFe(2)O(4)/poly(vinyl pyrrolidone) (PVP) composite nanofibers at 500-800 degrees C in air for 2 h resulted in well-developed spinel MgFe(2)O(4) nanostuctures. The crystal structure and morphology of the nanofibers were influenced by the calcination temperature. Crystallite size of the nanoparticles contained in nanofibers increased from 15 +/- 4 to 24 +/- 3 nm when calcination temperature was increased from 500 to 800 degrees C. Room temperature magnetization results showed a ferromagnetic behavior of the calcined MgFe(2)O(4)/PVP composite nanofibers, having their specific saturation magnetization (M(s)) values of 17.0, 20.7, 25.7, and 31.1 emu/g at 10 Oe for the samples calcined at 500, 600, 700, and 800 degrees C, respectively. It is found that the increase in the tendency of M(s) is consistent with the enhancement of crystallinity, and the values of M(s) for the MgFe(2)O(4) samples were observed to increase with increasing crystallite size.

Show MeSH