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Method for preparation of nitrogen doped porous nano carbon material with biomass as carbon source by gel process

A nano-carbon material, nitrogen-doped technology, applied in nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problems of easy falling off of metal particles, poor energy storage performance, low specific surface, etc., to increase the storage charge. capacity, increased added value, and the effect of strong adsorption capacity

Active Publication Date: 2017-07-04
NANJING NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of low electrical conductivity, high cost, easy agglomeration, low specific surface area, less voids, poor energy storage performance, and easy falling off of metal particles in existing biomass-prepared porous nano-carbon materials. Provided is a method for preparing nitrogen-doped porous nano-carbon materials by using biomass as a carbon source gel method, the preparation method has simple process operation, low cost, and is easy to realize large-scale commercial production

Method used

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  • Method for preparation of nitrogen doped porous nano carbon material with biomass as carbon source by gel process
  • Method for preparation of nitrogen doped porous nano carbon material with biomass as carbon source by gel process
  • Method for preparation of nitrogen doped porous nano carbon material with biomass as carbon source by gel process

Examples

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Embodiment 1

[0044] (1) Weigh a certain amount of bean dregs, soak them in ethanol for 24 hours at room temperature, and then soak them in deionized water for 10 hours; grind the soaked bean dregs and water into soybean milk at a mass ratio of 1:10, and the temperature is at 80°C , adding nickel nitrate to form tofu gel;

[0045] (2) Freeze-dry the tofu gel obtained in step (1), wherein the conditions of the freeze-dryer are: the temperature of the freeze-dryer is -55°C, and the air pressure is 0-150Pa;

[0046](3) Put the freeze-dried tofu gel in step (2) into a high-temperature furnace for heat treatment for pre-carbonization, and continuously feed nitrogen; wherein, the heat treatment conditions of the high-temperature furnace are: in the high-temperature furnace, at 5°C / min The heating rate was raised to 750°C, the nitrogen flow rate was 30mL / min, and the temperature was kept for 3h;

[0047] (4) Disperse the pre-carbonized material obtained in step (3) in water, add an activator KOH,...

Embodiment 2

[0051] Similar to Example 1, the difference is that the coagulant selected in this example is cobalt nitrate.

[0052] The nitrogen-doped porous nano-carbon material prepared in the above examples was characterized by XRD, as Figure 5 As shown, the diffraction peaks appearing at the 2θ angle of 22.44° on the map are the diffraction peaks of the graphite (002) crystal plane; On the Co[1 1 1], Co[2 0 0], Co[2 2 0] crystal planes, it shows that Co exists in a face-centered cubic structure, and it also proves that the product contains both carbon and cobalt.

Embodiment 3

[0054] Similar to Example 1, the difference is that the coagulant selected in this example is copper nitrate.

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Abstract

The invention discloses a method for preparation of a nitrogen doped porous nano carbon material with biomass as the carbon source by gel process and application thereof. The method includes: selecting soybean residue or soybean as the carbon source, using a transition metal salt as the coagulant, and making soaked, grinded and boiled soybean milk solidify to form tofu gel; and conducting vacuum freeze drying, and performing high temperature carbonization and activation under an inert atmosphere, thus obtaining the transition metal embedded nitrogen doped porous carbon nano material. The preparation method provided by the invention has the advantages of simple process operation, low cost and easy realization of large-scale commercial production. The nitrogen doped porous nano carbon material prepared by the method has a high degree of graphitization, large mechanical strength and high conductivity, is embedded with metal nanoparticles, and can be applied to supercapacitors, lithium-ion batteries, catalysis, adsorption and other fields.

Description

technical field [0001] The invention relates to a preparation method of a nanometer material, in particular to a method for preparing a multi-nitrogen-doped porous nanometer carbon material by using biomass as a carbon source gel method. Background technique [0002] With the shortage of non-renewable energy and the severe environmental pollution caused by fossil fuels, such as smog, acid rain, and the hole in the ozone layer are becoming more and more serious, it is urgent to develop renewable energy with biomass as an important component. Biomass energy refers to the storage of solar energy in the form of chemical energy in biomass by plants through photosynthesis. Biomass organisms are the most important carrier of solar energy. Biomass energy, like wind energy and solar energy, is a renewable energy source; its content of harmful substances is low, causing little environmental pollution; biomass energy is abundant and widely distributed, enabling industrialized producti...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J32/00B82Y30/00B82Y40/00H01G11/24H01G11/36H01G11/38H01G11/44B01J20/20B01J20/30
CPCB01J20/02B01J20/205H01G11/24H01G11/36H01G11/38H01G11/44B82Y30/00B82Y40/00B01J27/24B01J37/082B01J37/084B01J35/399B01J35/60Y02E60/13
Inventor 唐亚文刘刚徐林孙冬梅吴瑕邹修勇
Owner NANJING NORMAL UNIVERSITY
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