Method for preparing metal, metallic oxide or metallic hydroxide and carbon nano tube composite

A technology of carbon nanotubes and hydroxides, which is applied in the field of metal oxides, metal hydroxide/carbon nanotube composite materials, and metal preparation, and can solve the problems of large particle size, poor loading effect, and low loading capacity. To achieve the effect of mild reaction conditions, short reaction time and easy realization

Inactive Publication Date: 2010-07-28
INST OF CHEM CHINESE ACAD OF SCI
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Problems solved by technology

However, the disadvantage of this method is that the adsorbed molecules will hinder the application of the complex in some fields such as catalytic applications, etc.
(3) Supercritical fluid chemical deposition method, but higher reaction tem

Method used

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  • Method for preparing metal, metallic oxide or metallic hydroxide and carbon nano tube composite
  • Method for preparing metal, metallic oxide or metallic hydroxide and carbon nano tube composite
  • Method for preparing metal, metallic oxide or metallic hydroxide and carbon nano tube composite

Examples

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Example Embodiment

[0029] Example 1. Preparation of platinum / multi-walled carbon nanotube nanocomposites

[0030] Add 1 mg of multi-walled carbon tubes with a diameter of 40-60 nm into 20 mL of ethanol, ultrasonically disperse it in an ice-water bath for 2 minutes, and add 1 mL of chloroplatinic acid ethanol solution with a concentration of 1.0 mg / mL to the dispersion; Under the action of ultrasound, 1 ml of a 0.36 mg / ml sodium borohydride ethanol solution was slowly added dropwise to obtain a platinum / multi-walled carbon nanotube composite material with a platinum loading of 27.4 wt%. The ultrasonic energy used in this method is 500W, and the reaction temperature is 0°C. The TEM photographs of the obtained material are shown in figure 1 (Microscope model JEM-2011, accelerating voltage 200kV). It can be seen from the figure that the platinum particles are uniformly loaded on the surface of the carbon tube, and their size distribution is narrow, with an average diameter of 2.4 nm. Due to the a...

Example Embodiment

[0031] Example 2. Preparation of platinum / multi-walled carbon nanotube nanocomposites

[0032] Add 1 mg of multi-walled carbon tubes with a diameter of 40-60 nm to 20 mL of ethanol, ultrasonically disperse it in an ice-water bath for 2 minutes, and add 1 mL of 0.14 mg / mL chloroplatinic acid ethanol solution to the dispersion; Under the action of ultrasound, 1 ml of a 0.05 mg / ml sodium borohydride ethanol solution was slowly added dropwise to obtain a platinum / multi-walled carbon nanotube composite material with a platinum loading of 5 wt%. The ultrasonic energy used in this method is 500W, and the reaction temperature is 0°C. Transmission electron microscopy analysis showed that platinum particles were uniformly loaded on the surface of the carbon tube, and their size was 1.9 nm.

Example Embodiment

[0033] Example 3. Preparation of platinum / multi-walled carbon nanotube nanocomposites

[0034] Add 1 mg of a multi-walled carbon tube with a diameter of 40-60 nm to 20 mL of ethanol, ultrasonically disperse it in an ice-water bath for 2 minutes, and add 1 mL of a 0.29 mg / mL chloroplatinic acid ethanol solution to the dispersion; Under the action of ultrasound, 1 ml of a 0.1 mg / ml sodium borohydride ethanol solution was slowly added dropwise to obtain a platinum / multi-walled carbon nanotube composite material with a platinum loading of 10 wt%. The ultrasonic energy used in this method is 500W, and the reaction temperature is 0°C. Transmission electron microscopy analysis showed that platinum particles were uniformly loaded on the surface of the carbon tubes, and their size was 2.0 nm.

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Abstract

The invention discloses a method for preparing metal, metallic oxide or metallic hydroxide and carbon nano tube composite. In the method, a carbon tube is ultrasonic-dispersed in solvent, a metal precursor is ultrasonic-dispersed in the solvent, and the dispersion solution are mixed uniformly and ultrasonically; under the ultrasonic action, the solution can react with reducing agent or aqueous alkali or ethanol and water, so as to obtain the metal, the metallic oxide or the metallic hydroxide and the carbon nano tube composite respectively. In the invention, by utilizing the reduction, oxidization and hydrolysis reactions of the metal precursor in the carbon tube dispersion solution under the ultrasonic action, the generated metal, metallic oxide or metallic hydroxide are directly loaded on the surface of the carbon tube, so as to prepare the metal, the metallic oxide or the metallic hydroxide and the carbon nano tube composite. The method has simple operation, short reaction time and easy realization; the reaction condition is mild without high-temperature high-pressure equipment; pre-modification treatment for the carbon tube is avoided, so as not to damage the electronic structure of the carbon tube; in addition, the higher load concentration can be achieved.

Description

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Claims

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Application Information

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Owner INST OF CHEM CHINESE ACAD OF SCI
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