New method for synthesizing nanometal particle-loaded carbon nanofiber

A technology of nano metal particles and carbon nanofibers

Inactive Publication Date: 2013-03-13
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Jiao J et al. used the arc discharge method to prepare FeC core-shell structure composites, but this method has low yield and high temperature.
Song H H also prepared FeC composites by chemical vapor deposition, but this method requires an independent carbon source, catalyst, and the catalyst is difficult to separate from the product
In the FeC composites synthesized by these methods, the iron nanoparticles are all coated in the carbon material and have not been fully utilized.

Method used

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  • New method for synthesizing nanometal particle-loaded carbon nanofiber
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  • New method for synthesizing nanometal particle-loaded carbon nanofiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] In the first step, weigh 2.0g of polyvinylpyrrolidone and 0.9g of ferrocene and dissolve them in a beaker, add 11ml of absolute ethanol and 9ml of dimethylformamide solvent, and place them in the beaker with magnetic stirring to form a uniform orange solution.

[0028] The second step is to transfer the prepared solution into the syringe, connect the electrospinning device, and set the spinning conditions, the voltage is 13Kv, the injection rate is 1ml / h, and the receiving distance is 15cm. The high-pressure generator was started, and the spinning process lasted for 5 hours, and then the prepared composite nanofibers were dried at 60 °C. Use tweezers to peel off the early composite product from the aluminum foil, and use a field emission scanning electron microscope (Philips, XL-30E, SEM) with a scanning voltage of 3KV and a magnification of 60,000 times ( figure 1 ) conditions, it can be seen that the early composite product has a one-dimensional linear structure, but ...

Embodiment 2

[0035] In the first step, weigh 1.0 g of polyacrylonitrile and 0.5 g of ferrocene and dissolve them in a beaker, add 10 ml of dimethylformamide solvent, and stir magnetically to form a uniform orange solution.

[0036] The second step is to transfer the prepared solution into the syringe, connect the electrospinning device, and set the spinning conditions, the voltage is 10Kv, the injection rate is 0.5ml / h, and the receiving distance is 19cm. Start the high-voltage generator, and the spinning process lasts for 5 hours, and then the prepared composite nanofibers are dried at 61 ° C. The product and the aluminum foil are peeled off with tweezers.

[0037] In the third step, the product of the second step is transferred to a tube furnace, heated to 250°C at a rate of 2°C / min in an air atmosphere, and kept at this temperature for 0.5h. Then in an argon atmosphere Continue heating to 700°C, keep warm for 1h, then cool down to room temperature naturally. The product obtained at thi...

Embodiment 3

[0041] In the first step, weigh 1.5g of polyvinylpyrrolidone and 0.6g of ferrocene and dissolve them in a beaker, add 9ml of absolute ethanol and 6ml of dimethylformamide solvent, and place them in the beaker with magnetic stirring to form a uniform orange solution.

[0042] The second step is to transfer the prepared solution into the syringe, connect the electrospinning device, and set the spinning conditions, the voltage is 11Kv, the injection rate is 0.6ml / h, and the receiving distance is 17cm. Start the high-voltage generator, and the spinning process lasts for 10 hours, and then the prepared composite nanofibers are dried at 64°C. The product and the aluminum foil are peeled off with tweezers.

[0043] In the third step, the product of the second step is transferred to a tube furnace, directly heated to 600°C at a rate of 1°C / min in an argon atmosphere, kept at this temperature for 2h, and then naturally cooled to room temperature. The product obtained at this time is th...

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Abstract

The invention relates to a new method for synthesizing nanometal particle-loaded carbon nanofiber. According to the method, an iron-containing compound and a high molecular polymer are taken as reaction precursors and the method comprises the following steps of: mixing the reaction precursors, absolute ethyl alcohol and dimethylformamide (DMF) to obtain a uniform solution; preparing pre-composite nanofiber by an electrostatic spinning device, and drying; transferring the nanofiber into a tube furnace; heating to 500-700 DEG C in oxygen-free condition; and keeping the temperature for a certain period of time to obtain the nanometal particle-loaded carbon nanofiber. Compared with the prior art, the method provided by the invention takes short time and has simple steps.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and relates to a new method for synthesizing carbon nanofibers supported by nanometer metal particles. Background technique [0002] As a one-dimensional nanostructure material, carbon nanofiber (CNF) has similar surface chemical properties to carbon nanotubes, high mechanical strength, good electrical conductivity and large specific surface area, and it not only has the surface effect of usual nanomaterials , quantum size effect and small size effect, etc., and also has excellent thermal stability, mechanical properties, electron and photon transport properties, optical properties and photoconductive properties, etc., so that it can be used as the basic building block of materials in nanoelectronics and optical devices. , sensors, nano-biotechnology and other aspects have shown important application value. The methods for constructing one-dimensional nanomaterials mainly include tem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/21D01F9/22D01F1/10D01D5/00
Inventor 柴记红吴庆生
Owner TONGJI UNIV
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