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Method for selectively filling ferric oxide particles in hollow cavity of carbon nanotube

A technology of iron oxide particles and carbon nanotubes, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, chemical/physical processes, etc. Filling etc.

Inactive Publication Date: 2010-06-23
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It solves the problem that it is impossible to selectively fill the catalyst particles into the hollow tube cavity, and the amount and size of the filled particles cannot be controlled

Method used

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  • Method for selectively filling ferric oxide particles in hollow cavity of carbon nanotube
  • Method for selectively filling ferric oxide particles in hollow cavity of carbon nanotube

Examples

Experimental program
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Effect test

Embodiment 1

[0021] In 3wt% oxalic acid aqueous solution, an aluminum sheet is used for the cathode, and an aluminum sheet is used for the anode, and anodic oxidation is performed at 20°C and 40V to prepare an anodic aluminum oxide film with one end open. After the anodic aluminum oxide film is dried, chemical vapor deposition of acetylene gas is carried out at 600°C for 0.5 hours, the carrier gas is argon, the flow rate is 300ml / min, the heating rate is 5°C / min, the volume concentration of acetylene gas is 1.5%, and the carbon layer is deposited The thickness is 2 nm. The anodic aluminum oxide film after carbon deposition was placed in a ferric nitrate solution with a concentration of 30wt%, and was taken out after ultrasonic vibration for 2 hours. After cleaning the surface, it was dried in the air at 140°C for 6 hours, and then dried at 5°C / min under an argon atmosphere. The rate was increased to 350 °C, and the temperature was maintained for 3 hours. After cooling to room temperature,...

Embodiment 2

[0023] The preparation method of the anodic aluminum oxide film is the same as in Example 1. After the anodic aluminum oxide film was dried, chemical vapor deposition of acetylene gas was carried out at 700°C for 5 hours, the carrier gas was nitrogen, the flow rate was 300ml / min, the heating rate was 5°C / min, the volume concentration of acetylene gas was 5%, and the carbon layer was deposited The thickness is 20 nm. The anodic aluminum oxide film after carbon deposition was placed in a ferric nitrate solution with a concentration of 25wt%, and was taken out after ultrasonic vibration for 0.5 hours. After cleaning the surface, it was dried in vacuum at 60°C for 2 hours, and then heated at 30°C / min under an argon atmosphere. The rate was increased to 350°C and the temperature was held for 1 hour. After cooling to room temperature, the anodic aluminum oxide film is removed to obtain carbon nanotubes with iron oxide particles completely filling the hollow lumen. like figure 2 ...

Embodiment 3

[0025] In 10wt% sulfuric acid aqueous solution, an aluminum sheet is used for the cathode and an aluminum sheet is used for the anode, and anodic oxidation is performed at 10°C and 20V to prepare an anodic aluminum oxide film with one end open. After the anodic aluminum oxide film is dried, carry out chemical vapor deposition of acetylene gas at 600°C for 0.5 hours, the carrier gas is argon, the flow rate is 200ml / min, the heating rate is 5°C / min, the volume concentration of acetylene gas is 5%, and the carbon layer is deposited The thickness is 5 nm. The anodic aluminum oxide film after carbon deposition was placed in a ferric nitrate solution with a concentration of 25wt%, and was taken out after ultrasonic vibration for 3 hours. After cleaning the surface, it was dried at 140°C for 3 hours in an air atmosphere, and then dried at 10°C / m in an argon atmosphere. The rate of min was increased to 350°C, and the temperature was kept constant for 3 hours. After cooling to room te...

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Abstract

The invention relates to the selectively filling of ferric oxide particles in the hollow cavity of a carbon nanotube, in particular to a method for selectively filling ferric oxide particles in the hollow cavity of a carbon nanotube, with accurate and controllable ferric oxide particle filling amount and size, and the application of a filling compound. An anodic alumina membrane with a regular pore structure is taken as a template, and a carbon layer is evenly deposited on the template by a chemical vaporous deposition method, and then an anodic alumina membrane / carbon compound is obtained; the compound is put in a ferric nitrate solution and then is ultrasonically shaken at room temperature; the anodic alumina membrane / carbon compound is taken out and then is treated under the protective atmosphere after being dried; ferric nitrate is decomposed into ferric oxide; then the anodic alumina template is removed; and finally, a carbon nanotube that the ferric oxide particles are selectively filled in the hollow cavity of the carbon nanotube is obtained. The ferric oxide particles are selectively filled in the hollow cavity of the carbon nanotube, the content by weight of the ferric oxide particles is between 5 percent and 70 percent and is accurate, even and controllable, and the sizes of the ferric oxide particles are between 1nm and 10nm and is controllable.

Description

technical field [0001] The invention relates to the selective filling of iron oxide particles in the hollow cavity of carbon nanotubes, specifically a method for selectively filling iron oxide particles in the hollow cavity of carbon nanotubes, and the filling amount and size of the iron oxide particles are precisely and controllable and filling compound use. Background technique [0002] Modern humans are facing problems such as energy and environmental pollution, and the solutions to these problems need to rely heavily on catalytic processes. The carrier plays an important role in the catalytic process. It serves as the skeleton of the catalyst. Its main functions are to increase the active surface and provide suitable pores, provide active centers, improve the thermal conductivity and thermal stability of the catalyst, and improve the mechanical strength of the catalyst. and performance (the chemical interaction between the carrier and the active component of the catalys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J37/00B01J37/08B01J23/745B01J21/18B01J35/00
Inventor 侯鹏翔喻万景李世胜刘畅成会明
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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