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Synthesis method of graded porous carbon nanometer material

A technology of carbon nanomaterials and synthesis methods, which is applied in the field of synthesis of hierarchical porous carbon nanomaterials, can solve the problems of complex preparation process, large organic solvent, unfavorable wide application and exploration of hierarchical porous carbon materials, etc. High adaptability and mild condition effect

Active Publication Date: 2019-10-22
安徽枡水新能源科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The current synthesis methods of hierarchical porous carbon materials usually require the use of a large amount of organic solvents, the cost of raw materials, and the complicated preparation process, which is not conducive to the wide application and exploration of hierarchical porous carbon materials

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  • Synthesis method of graded porous carbon nanometer material
  • Synthesis method of graded porous carbon nanometer material
  • Synthesis method of graded porous carbon nanometer material

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preparation example Construction

[0035] The invention provides a synthetic method of hierarchical porous carbon nanomaterials, comprising the following steps:

[0036] A) mixing and reacting small organic molecules containing multichelating groups or adjacent hydroxyl groups and inorganic zinc salts in an alkaline aqueous solution to obtain a precursor precipitated in the form of precipitation;

[0037] B) performing high temperature pyrolysis on the precursor to obtain hierarchical porous carbon nanomaterials.

[0038] In the invention, firstly, small organic molecules containing multi-chelating groups or adjacent hydroxyl groups and inorganic zinc salts are mixed and reacted in an alkaline aqueous solution to obtain a precursor precipitated in the form of precipitation.

[0039] Specifically, a small organic molecule containing a multichelating group or an ortho-diphenol is dissolved in an alkaline aqueous solution to obtain a mixed solution;

[0040] The small organic molecules containing multichelating g...

Embodiment 1

[0062] a. Disperse 0.8g of terephthalic acid into 80ml of water, then add 2.67ml of triethylamine, after stirring for half an hour, then add 5.73g of zinc nitrate hexahydrate, and continue stirring for 24 hours to obtain the precipitated precursor ;

[0063] b. Centrifuge the above-mentioned aqueous solution containing the precursor to remove water, then add clean water and repeat washing three times by centrifugation, and finally put it into an oven for drying;

[0064] c. Transfer the completely dried precursor to a quartz crucible, put it into a tube furnace, and then pass in nitrogen as a protective gas, raise the temperature of the tube furnace to 1000 °C at a rate of 5 °C / min, and keep it for 2 hours; Cool down to 500°C at a rate of 5°C / min, and finally cool down to room temperature naturally; maintain normal pressure in the tube furnace. Obtain hierarchical porous carbon nanomaterials;

[0065] figure 1 It is a scanning electron micrograph of the hierarchical porous ...

Embodiment 2

[0069] a. Disperse 0.8g of terephthalic acid and 0.209mg of suberic acid into 80ml of water, then add 3.34ml of triethylamine, after stirring for half an hour, add 7.16g of zinc nitrate hexahydrate, and continue stirring for 24 hours to obtain the following: Precursors precipitated in the form of precipitation;

[0070] b. Centrifuge the above-mentioned aqueous solution containing the precursor to remove water, then add clean water and repeat washing three times by centrifugation, and finally put it into an oven for drying;

[0071] c. Transfer the completely dried precursor to a quartz crucible, put it into a tube furnace, and then pass in nitrogen as a protective gas, raise the temperature of the tube furnace to 1000 °C at a rate of 5 °C / min, and keep it for 2 hours; Cool down to 500°C at a rate of 5°C / min, and finally cool down to room temperature naturally; maintain normal pressure in the tube furnace. Obtain hierarchical porous carbon nanomaterials;

[0072] image 3 I...

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Abstract

The invention provides a synthesis method of a graded porous carbon nanometer material. The synthesis method of the graded porous carbon nanometer material comprises the following steps: A) mixing small organic molecules containing polychelating grou or o-hydroxyl grou and inorganic zinc salt into an alkaline aqueous solution and performing reaction to obtain a precursor which is separated out inthe form of precipitate; and B) performing high-temperature pyrolysis on the precursor to obtain the graded porous carbon nanometer material. The small organic molecules containing the polychelating group or the o-hydroxyl group and zinc are stirred in the alkaline aqueous solution at a room temperature to form a coordinate polymer or a coordinate compound serving as the precursor, the precursor in the high-temperature pyrolysis process and the chelated zinc are agglomerated to form nanoscale dispersed zinc particles to realize a template pore-forming effect, and the zinc nanoparticles can realize evaporation through further high-temperature treatment, so that the graded porous carbon nanometer material can be obtained without subsequent etching. The synthesis method provided by the invention is simple, low in cost, high in controllability, high in universality and mild in condition.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, and in particular relates to a synthesis method of hierarchical porous carbon nanomaterials. Background technique [0002] Traditional porous carbon materials are obtained by high-temperature pyrolysis of biomass materials (such as pitch, coconut shell, lignocellulose, corn stalks, etc.) as precursors, combined with physical or chemical activation methods. Through this simple and low-cost synthesis method, a series of biomass-derived porous carbon materials have been developed in industry, and are widely used in the separation of gases or liquids, water treatment, air purification and other fields. However, due to the influence of the place of origin, growth environment and its own characteristics, the structure and composition of biomass materials are complex and the content of impurities is high, which leads to poor controllability of the microstructure and properties of the derived carbo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01B32/05
Inventor 梁海伟童磊张乐乐
Owner 安徽枡水新能源科技有限公司
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