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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  • Summary
  • 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 po

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

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0043] Example 1

[0044] (1) Weigh a certain amount of bean dregs, soak it in ethanol for 24 hours at room temperature, and then soak 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 80°C. , Add nickel nitrate to form tofu gel;

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

[0046] (3) Put the tofu gel that has been freeze-dried in step (2) into a high-temperature furnace for heat treatment for pre-carbonization, and continue to introduce nitrogen; the heat treatment conditions of the high-temperature furnace are: in a high-temperature furnace at 5°C / min The heating rate is increased to 750℃, the nitrogen flow rate is 30mL / min, and the temperature is kept for 3h;

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

Example Embodiment

[0050] Example 2

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

[0052] XRD was used to characterize the nitrogen-doped porous nano-carbon materials prepared in the above examples, such as Figure 5 As shown, the diffraction peaks appearing at the 2θ angle of 22.44° are the diffraction peaks of graphite (002) crystal plane; the diffraction peaks appearing at the 2θ angles of 44.21°, 51.95°, and 76.07° are the diffraction peaks of elemental Co, respectively The crystal planes of Co[1 1 1], Co[2 0 0] and Co[2 2 0] indicate that Co exists in a face-centered cubic structure, and it also proves that the product contains both carbon and cobalt.

Example Embodiment

[0053] Example 3

[0054] Similar to Example 1, except 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
CPCB01J20/02B01J20/205B01J27/24B01J35/0093B01J35/10B01J37/082B01J37/084B82Y30/00B82Y40/00H01G11/24H01G11/36H01G11/38H01G11/44Y02E60/13
Inventor 唐亚文刘刚徐林孙冬梅吴瑕邹修勇
Owner NANJING NORMAL UNIVERSITY
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