Method of in-situ filling symbiotic iron nanometer wire on thin wall nanometer pipe

A technology of iron nanowires and carbon nanotubes, which is applied in the direction of nanotechnology, nanotechnology, nanostructure manufacturing, etc., can solve the problems of rough tube walls, low filling rate, and tube wall thickness, and achieve simple and controllable preparation processes. Strong controllability, simple process and controllable effect

Inactive Publication Date: 2006-11-29
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the tube wall of carbon nanotubes is not smooth, the tube diameter is different, and the tube wall is thicker; there are many impurities in the product, and some Fe is often filled in the carbon nanotubes. 3 C; the filling rate is low, and the iron nanowire length is below the micron level

Method used

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  • Method of in-situ filling symbiotic iron nanometer wire on thin wall nanometer pipe
  • Method of in-situ filling symbiotic iron nanometer wire on thin wall nanometer pipe
  • Method of in-situ filling symbiotic iron nanometer wire on thin wall nanometer pipe

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 1) Weigh 1.0 g of ferrocene powder, dissolve it in 20 mL of dichlorobenzene solution, and mix evenly to form a brown-yellow transparent solution;

[0040] 2) Mount the quartz substrate on the quartz boat, then slowly push the quartz boat into the middle of the quartz tube, seal the two ends of the quartz tube with sealant, and use the heating gas expansion method to ensure the airtightness of the quartz tube.

[0041] 3) Pour argon gas into the quartz tube with a flow rate of 200mL / min, and heat it to the temperature required for the test at 750°C;

[0042] 4) Use a temperature controller to keep the temperature of the capillary port inserted into the quartz tube at 250°C;

[0043] 5) Adjust argon to 3000mL / min, and pass in 200mL / min of hydrogen;

[0044] 6) Turn on the precision flow pump and suck the reaction solution into the quartz tube at a feed rate of 0.4 mL / min;

[0045] 7) After 30 minutes, stop the hydrogen flow, reduce the argon flow rate to 200 mL / min, until the...

Embodiment 2

[0047] 1) Weigh 1.2 g of ferrocene powder and dissolve in 20 mL of dichlorobenzene solution and mix it evenly to form a brown-yellow transparent solution.

[0048] 2) Mount the quartz substrate on the quartz boat, then slowly push the quartz boat into the middle of the quartz tube, seal the two ends of the quartz tube with sealant, and use the heating gas expansion method to ensure the airtightness of the quartz tube.

[0049] 3) Pour argon gas into the quartz tube at a flow rate of 300 mL / min, and heat it to the temperature required for the test at 900°C.

[0050] 4) Use a temperature controller to keep the temperature of the capillary port inserted into the quartz tube at 300°C.

[0051] 5) Adjust the argon gas to 3000 mL / min, and pass in 200 mL / min hydrogen gas.

[0052] 6) Turn on the precision flow pump, and suck the reaction solution into the quartz tube at a feed rate of 0.6 mL / min.

[0053] 7) After 30 minutes, stop the hydrogen flow, reduce the argon flow rate to 200 mL / m...

Embodiment 3

[0055] 1) Weigh 1.8 g of ferrocene powder and dissolve in 20 mL of dichlorobenzene solution, mix it evenly to form a brown-yellow transparent solution.

[0056] 2) Mount the quartz substrate on the quartz boat, then slowly push the quartz boat into the middle of the quartz tube, seal the two ends of the quartz tube with sealant, and use the heating gas expansion method to ensure the airtightness of the quartz tube.

[0057] 3) Pour argon gas into the quartz tube at a flow rate of 300 mL / min, and heat it to the temperature required for the test at 820°C.

[0058] 4) Use a temperature controller to keep the temperature of the capillary port inserted into the quartz tube at 300°C.

[0059] 5) Adjust the argon gas to 3000 mL / min, and pass in 200 mL / min hydrogen gas.

[0060] 6) Turn on the precision flow pump, and suck the reaction solution into the quartz tube at a feed rate of 0.8 mL / min.

[0061] 7) After 30 minutes, stop the hydrogen flow, reduce the argon flow rate to 200 mL / min,...

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Abstract

A process for preparing the in-situ symbiotic thin-wall carbon nano-tubes and iron nanowires filled in said nanotube includes such steps as dissolving ferrocene in Cl contained organic solvent, filling Ar gas in air-tight quartz tube, heating, controlling the temp at the end of capillary tube inserted in said quartz tube to be 250-300 deg.C, filling H2, pumping said solution in reactor, reaction, stopping to fill H2, and cooling.

Description

Technical field [0001] The invention relates to a method for filling thin-walled carbon nanotubes with in-situ symbiotic iron nanowires, and belongs to the technical field of carbon nanomaterial synthesis and application. Background technique [0002] Carbon nanotubes are one-dimensional nanomaterials made of one or several layers of graphite sheets curled at a certain helix angle. Carbon nanotubes are classified into single-wall, double-wall and multi-wall carbon nanotubes. Carbon nanotubes have triggered a global research boom in carbon nanotubes due to their unique structure and excellent performance. The energy gap width of carbon nanotubes varies with the helix angle, and its conductivity is between conductors and semiconductors; for example, the current-carrying capacity of carbon nanotubes is as high as 10 9 A / cm 2 It is 1000 times higher than that of copper; theoretical calculations show that the elastic modulus of carbon nanotubes can reach 1 TPa, and the macroscopic ten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02B82B3/00
Inventor 王文祥韦进全王昆林吕瑞涛康飞宇张先锋吴德海
Owner TSINGHUA UNIV
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