Preparation method of metal nanoparticle wrapped nitrogen-containing carbon nanotubes

A technology of metal nanoparticles and nanotubes, which is applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of increasing production costs, high requirements for corrosion resistance of gas pipelines, and high cost of precursors and other problems, to achieve the effect of easy control, short high temperature treatment time and mild conditions

Inactive Publication Date: 2016-07-13
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the cost of the precursor of the former is high, and the latter has high requirements on the corrosion resistance of equipment, especially gas pipelines, which directly increases the production cost

Method used

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  • Preparation method of metal nanoparticle wrapped nitrogen-containing carbon nanotubes
  • Preparation method of metal nanoparticle wrapped nitrogen-containing carbon nanotubes
  • Preparation method of metal nanoparticle wrapped nitrogen-containing carbon nanotubes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Weigh 2 grams of melamine solid, add 4 milliliters of 36% (mass fraction) formaldehyde solution, and then add 10 milliliters of water to keep the ratio of melamine: formaldehyde: water (mass) 1:0.8:7. Add 10 mg of sodium hydroxide to adjust the pH of the above suspension to alkaline. The suspension was heated to 75°C for 30 minutes to obtain a clear and transparent solution. The solution was cooled to room temperature (20-25 degrees Celsius), and 2.5 ml of acetic acid solution was added dropwise with stirring and continued stirring until a white solid precipitated. The precipitate was separated and dried. Take by weighing 5 grams of ferric chloride hexahydrate and be dissolved in the middle of 100 milliliters of ethanol, add 10 grams of magnesium oxide powders in the solution obtained under stirring condition, keep magnesium oxide: the mass ratio of ferric chloride hexahydrate is 2:1, After vigorous stirring, it was filtered and dried to obtain a reddish-brown solid. ...

Embodiment 2

[0023] Adopting the preparation process of Example 1, the difference is that the mass ratio of ferric chloride hexahydrate to magnesium oxide in the catalyst used is 1:1, and the obtained carbon nanotube diameter becomes thicker, indicating that the morphology of the material is in the Controllable within a certain range. The specific shape of the material is as image 3 shown.

Embodiment 3

[0025] The preparation process of Example 2 is adopted, the difference is that metal ruthenium is loaded on it by impregnation reduction method. The ruthenium nanoparticles can be clearly distinguished under the electron microscope, indicating the operability of the material as a catalyst carrier. The shape of the catalyst is as Figure 4 shown.

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Abstract

The invention relates to a preparation method of metal nanoparticle wrapped nitrogen-containing carbon nanotubes. The method concretely comprises the following steps: mixing a proper amount of melamine with a formaldehyde solution at room temperature, adding a certain amount, and adjusting the pH value of the obtained solution to 8-10 by using an alkali; heating the above obtained suspension in a specific temperature range for a period of time, cooling the heated suspension, and adding acetic acid in a dropwise manner while stirring for a long time; separating the above obtained white solid for later use; taking a quantified amount of a metal iron salt, dissolving the metal iron salt in ethanol, and adding an inert solid oxide carrier in proportion; removing ethanol to obtain a metal iron salt supported catalyst; and mixing the obtained white solid with the iron salt catalyst, grinding the obtained mixture, and processing the ground mixture in inert gas atmosphere at 900-1000DEG C for a prescribed time to obtain the target product. The method has the advantages of simple process, low device requirements, less energy consumption, and simple and easily controlled reaction process; and the obtained product has uniform morphology and a high specific surface area, and can be used as a good catalyst carrier and a gas molecule adsorbent.

Description

technical field [0001] The invention relates to a preparation method of a nitrogen-containing carbon nanotube wrapped with metal nanoparticles inside, specifically a one-dimensional carbon nanomaterial containing nitrogen, carbon and iron elements, having a high specific surface area and a bamboo-shaped hollow shape Preparation. Background technique [0002] Since the discovery of carbon nanotube materials in the 1980s, it has attracted extensive attention from academic and industrial circles. This new type of carbon material can be regarded as a cylinder formed by curling a limited number of layers of graphite. Its unique one-dimensional structure, hollow shape and unique electronic conductivity make it widely used in functional materials, catalyst supports, analysis and detection, and electrochemistry. and other fields have been widely used. In recent years, with the progress of research on nitrogen-doped carbon materials, the synthesis and application of nitrogen-doped ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24
Inventor 杨启华姚毅
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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