Preparation method of nitrogen-containing carbon nanotubes wrapped with metal nanoparticles inside

A technology of metal nanoparticles and nanotubes, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of increased 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: 2018-01-09
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 nitrogen-containing carbon nanotubes wrapped with metal nanoparticles inside
  • Preparation method of nitrogen-containing carbon nanotubes wrapped with metal nanoparticles inside
  • Preparation method of nitrogen-containing carbon nanotubes wrapped with metal nanoparticles inside

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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PUM

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Abstract

The invention relates to the preparation of a nitrogen-containing carbon nanotube wrapped with metal nanoparticles inside. The specific steps are as follows: at room temperature, mix an appropriate amount of melamine and formaldehyde solution, add a certain amount of water, and adjust the pH value to 8 to 10 with alkali. The suspension was heated at a specific temperature range for a period of time and then cooled, and acetic acid was added dropwise thereto and stirred for a long time. The obtained white solid was separated and used for later use. On the other hand, a certain amount of metal iron salt is dissolved in ethanol, and an inert solid oxide carrier is added in proportion. After removing ethanol, a catalyst loaded with metal iron salt was obtained. Mix the previously obtained white solid with the iron salt catalyst, grind it, and treat it at 900-1000 degrees Celsius for a specified time under an inert gas atmosphere to obtain the product. The method has the advantages of simple process, low equipment requirements, low energy consumption, simple and easy-to-control reaction process; the obtained material has uniform morphology and high specific surface area, and can be used as a good catalyst carrier and 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 Patents(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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