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Method of preparing single-wall carbon nanotube loaded with noble metal nanoparticle

A single-walled carbon nanotube and nanoparticle technology, applied in chemical instruments and methods, catalyst activation/preparation, metal/metal oxide/metal hydroxide catalysts, etc., can solve problems such as reducing the crystallinity of carbon nanotubes

Active Publication Date: 2011-03-30
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods separate the preparation of carbon nanotubes from the loading of metal nanoparticles, and chemically treat the surface of carbon nanotubes to introduce defects, thereby reducing the crystallinity of carbon nanotubes.

Method used

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  • Method of preparing single-wall carbon nanotube loaded with noble metal nanoparticle
  • Method of preparing single-wall carbon nanotube loaded with noble metal nanoparticle
  • Method of preparing single-wall carbon nanotube loaded with noble metal nanoparticle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: Preparation of single-walled carbon nanotubes containing rhodium nanoparticles

[0021] Drill a hole with a diameter of 4mm and a depth of 30mm at the center of the carbon electrode rod with a diameter of 6mm, and fill the hole with a mixture of iron powder, rhodium powder and carbon powder; the mass ratio of iron, rhodium and carbon powder is 2: 4:94; DC current 60A; distance between electrodes 2mm; discharge time 2 minutes; gas pressure 200Torr. Arc discharge in hydrogen / argon (volume ratio 2:3) mixed gas to obtain net-like and cloth-like products. Then heat treatment at 400°C in air for half an hour, soak in hydrochloric acid for 24 hours, and obtain the final sample.

[0022] figure 1 , figure 2 SEM and TEM photographs of single-walled carbon nanotubes containing rhodium nanoparticles.

experiment example 2

[0023] Experimental example 2: Preparation of single-walled carbon nanotubes containing iridium nanoparticles

[0024] Drill a hole with a diameter of 4mm and a depth of 30mm in the center of a carbon electrode rod with a diameter of 6mm, and fill the hole with a mixture of iron powder, iridium powder and carbon powder; the mass ratio of iron, iridium and carbon powder is 2: 4:94; DC current 60A; distance between electrodes 2mm; discharge time 2 minutes; gas pressure 200Torr. Arc discharge in hydrogen / argon (volume ratio 2:3) mixed gas to obtain net-like and cloth-like products. Then heat treatment at 400° C. in air for half an hour, soak in hydrochloric acid for 24 hours, and obtain single-walled carbon nanotubes loaded with iridium nanoparticles.

[0025] Figure 5 is a scanning electron micrograph of single-walled carbon nanotubes loaded with iridium nanoparticles.

experiment example 3

[0026] Experimental Example 3: Preparation of Single-walled Carbon Nanotubes Containing Platinum Nanoparticles

[0027] Drill a hole with a diameter of 4mm and a depth of 30mm at the center of the carbon electrode rod with a diameter of 6mm, and fill the hole with a mixture of iron powder, platinum powder and carbon powder (weight ratio, iron powder: platinum powder: carbon powder = 2: 4 : 94), DC current 60A, electrode distance 2mm, discharge time 2 minutes, gas pressure 200torr. Arc discharge in the mixed gas of hydrogen / argon (volume ratio 2:3) to obtain single-walled carbon nanotube network and cloth products loaded with iron and platinum nanoparticles. Figure 6 It is a scanning electron micrograph of single-walled carbon nanotubes loaded with iron and platinum nanoparticles. Then, heat treatment at 400° C. in air for half an hour, soak in hydrochloric acid for 24 hours, and then single-walled carbon nanotubes loaded with platinum nanoparticles can be obtained.

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Abstract

The invention relates to a method of preparing a single-wall carbon nanotube loaded with a noble metal nanoparticle, which belongs to the technical field of carbon nanotube material preparation process. The method comprises steps of taking iron powders as a main catalyst, and the noble metal as a secondary catalyst, evenly mixing the iron powders, the noble metal and the carbon powders, then filling the mixture into a pure carbon electrode rod with a hole in the middle to prepare a carbon electrode rod containing a noble metal; taking the carbon electrode rod as an anode, the pure carbon electrode rod as a cathode, subjecting the electrodes to DC or AC arc discharge in a hydrogen-containing atmosphere to obtain the single-wall carbon nanotube loaded with the noble metal nanoparticle, then treating the single-wall carbon nanotube by oxygen and hydrochloric acid to remove impurities to obtain the highly pure single-wall carbon nanotube loaded with the noble metal nanoparticle. The iron powder, the noble metal powder and the carbon powder have a weight percentage of 1:(0.2-4):(40-100). The air pressure of the discharge atmosphere is 100-1000 torr.

Description

technical field [0001] The invention relates to a preparation method of a single-walled carbon nanotube loaded with precious metal nanoparticles, belonging to the technical field of carbon nanotube material preparation technology. Background technique [0002] Since the discovery of single-walled carbon nanotubes (SWCNTs) in 1993, due to their unique one-dimensional structure and electrical, mechanical, mechanical and quantum properties, they have been used in nanoelectronic components, catalyst carriers, quantum wires, field emission device materials, and hydrogen storage. Materials and other aspects have great application prospects, and have become one of the most cutting-edge research fields in many disciplines such as physics, chemistry, materials, and biomedicine, and have attracted widespread attention and great interest from scholars all over the world. [0003] The nanotubular structure of carbon nanotubes makes it a new catalyst carrier. For example, metal particles...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J37/34
Inventor 赵新洛郁黎明盛雷梅安康张岩峰马晓辉郑欢
Owner SHANGHAI UNIV
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