Method for preparing carbon nanotube supported nanometer hydrated ruthenium oxide

A technology of carbon nanotubes and ruthenium dioxide, applied in chemical instruments and methods, catalyst activation/preparation, metal/metal oxide/metal hydroxide catalysts, etc., to avoid the influence of impurity ions, uniform size, and preparation conditions mild effect

Inactive Publication Date: 2006-07-26
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

[0007] The purpose of the present invention is to provide a method for preparing carbon nanotube-loaded hydrated nano-ruthenium dioxide, without the complex process of oxidation treatment to prepare ruthenium dioxide after the precipitation of ruthenium trichloride and alkali in the past, and to solve the proble...

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  • Method for preparing carbon nanotube supported nanometer hydrated ruthenium oxide
  • Method for preparing carbon nanotube supported nanometer hydrated ruthenium oxide
  • Method for preparing carbon nanotube supported nanometer hydrated ruthenium oxide

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preparation Embodiment 1

[0028] Add 500 mg of multi-walled carbon nanotubes to a 250 ml flask, add 10 ml of distilled water, and then add 25 mg of RuCl 3 ·nH 2 O, that is, the weight ratio of carbon nanotubes: ruthenium trichloride: water is 1:0.05:20, and ultrasonically oscillated for 0.5 h. At room temperature, hydrogen peroxide was slowly added dropwise, the weight ratio of hydrogen peroxide to ruthenium trichloride was 600:1, and the dropping time was 2 hours; after the hydrogen peroxide was completely added, the temperature was raised to 50° C., and refluxed for 6 hours. The suspension was filtered, the solid was washed with distilled water and acetone, and then dried in a drying oven at 100° C. for 24 hours to obtain a new composite material of nano-hydrated ruthenium dioxide supported by carbon tubes. According to the statistics of particle size distribution, the particle size of the hydrated ruthenium dioxide on the surface of the carbon nanotube is 1.15nm.

preparation Embodiment 2

[0030] Add 500mg of multi-walled carbon nanotubes to a 250ml flask, add 100ml of distilled water, and then add 500mg of RuCl 3 ·nH 2O, that is, the weight ratio of carbon nanotubes: ruthenium trichloride: water was 1:1:200 and ultrasonically oscillated for 4 hours. At room temperature, hydrogen peroxide was slowly added dropwise, the weight ratio of hydrogen peroxide to ruthenium trichloride was 100:1, and the dropping time was 10 h; after the hydrogen peroxide was completely added, the temperature was raised to 80° C., and refluxed for 3 h. The suspension was filtered, the solid was washed with distilled water and acetone, and then put into a drying oven at 120° C. for 8 hours to obtain a new nano-hydrated ruthenium dioxide composite material supported by carbon tubes. According to the statistics of the particle size distribution, the particle size of the hydrated ruthenium dioxide on the surface of the carbon nanotube is 1.85nm.

preparation Embodiment 3

[0032] Add 250mg of single-walled carbon nanotubes to a 250ml flask, add 25ml of distilled water, and then add 25mg of RuCl 3 ·nH 2 O, that is, the weight ratio of carbon nanotubes: ruthenium trichloride: water is 1:0.1:100 and ultrasonically oscillated for 3 hours. At room temperature, hydrogen peroxide was slowly added dropwise, the weight ratio of hydrogen peroxide to ruthenium trichloride was 300:1, and the dropping time was 4 hours; after the hydrogen peroxide was completely added, the temperature was raised to 100° C., and refluxed for 2 hours. The suspension was filtered, the solid was washed with distilled water and acetone, and then dried in a drying oven at 110° C. for 12 hours to obtain a new nano-hydrated ruthenium dioxide composite material supported by carbon tubes. According to the particle size distribution statistics, the particle size of the hydrated ruthenium dioxide on the surface of the carbon nanotube is 1.25nm.

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Abstract

The invention provides the method for preparation of hydrated nanometer ruthenium oxide loaded on carbon nanometer tube, comprising the following steps: putting the carbon nanometer tube into ruthenium chloride solution, vibrating with ultrasonic sound, at room temperature, adding hydrogen dioxide solution, carrying out heating-up reversed flow reaction, filtering, washing, drying and getting the product. The method is simple, and the hydrated ruthenium oxide has high dispersion degree on the carbon nanometer tube, small and homogeneous particles, good stability and high load capacity. The hydrated nanometer ruthenium oxide loaded on carbon nanometer tube has wide application in super capacitance and alcohol oxidative catalyst.

Description

technical field [0001] The invention relates to a preparation method of carbon nanotube-loaded hydrated nanometer ruthenium dioxide. Background technique [0002] Ruthenium dioxide (RuO 2 ) is an indispensable anode material in chemical industries such as chlor-alkali and chlorate, and has excellent electrocatalytic activity. Industrial ruthenium dioxide is prepared by thermal analysis method, and there are unavoidable defects such as uncertain degree of electrooxidation, which affects the development of high-performance ruthenium-containing oxide electrodes. Recently, scientists have prepared submicron and nanoscale RuO by organic ruthenium (ruthenium alcohol) sol-gel method, sodium hydroxide precipitation and reoxidation method, etc. 2 Powder powder has achieved good results, but there are still problems such as expensive organic ruthenium raw materials, particle agglomeration, and large scale for the preparation of hydrated nano-ruthenium dioxide. W...

Claims

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Application Information

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IPC IPC(8): B01J23/46B01J32/00B01J37/34B01J37/12
Inventor 彭峰傅小波余皓王红娟冯景贤
Owner SOUTH CHINA UNIV OF TECH
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