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A kind of method that uses algae plant as carbon source to prepare multi-level structure carbon material

A technology for carbon materials and plants, applied in the field of preparing multi-level structure carbon materials, can solve the problems of long period, single pore structure, complicated preparation process of porous carbon materials, etc., and achieve short period, simple operation process and short preparation period. Effect

Active Publication Date: 2018-03-16
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The preparation process of the porous carbon material prepared above is complicated, the cycle is long, and the pore structure is relatively simple.

Method used

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  • A kind of method that uses algae plant as carbon source to prepare multi-level structure carbon material
  • A kind of method that uses algae plant as carbon source to prepare multi-level structure carbon material
  • A kind of method that uses algae plant as carbon source to prepare multi-level structure carbon material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A method for preparing a multi-level structure carbon material, comprising the following steps:

[0034] Step 1: Prepare a nickel nitrate solution with a concentration of 0.1 mol / L, weigh 10 g of algae, and soak it in the nickel salt solution for 20 hours.

[0035] Step 2: crush the soaked algae with a mixer for 6 minutes, centrifuge the algae slurry at a speed of 8000r / min for 5 minutes to obtain a precursor, and freeze-dry it at a temperature of -60°C and an air pressure of 10Pa for 30 hours to obtain an intermediate product.

[0036] Step 3: Put the obtained intermediate product into an argon atmosphere furnace, firstly raise the temperature from room temperature to 300°C at a rate of 10°C / min for carbonization for 90 minutes, and then increase the rate of temperature at 10°C / min to 800°C to catalyze graphitization 90min.

[0037] Step 4: Put the product after catalytic graphitization into an argon atmosphere furnace, load water vapor into the reaction furnace throu...

Embodiment 2

[0039] A method for preparing a multi-level structure carbon material, comprising the following steps:

[0040] Step 1: Prepare a nickel nitrate solution with a concentration of 0.2 mol / L, weigh 20 g of algae, and soak it in the nickel salt solution for 22.5 hours.

[0041] Step 2: crush the soaked algae with a mixer for 7 minutes, centrifuge the algae slurry at a speed of 8250r / min for 5 minutes to obtain a precursor, and freeze-dry it at a temperature of -57.5°C and an air pressure of 20Pa for 32.5 hours to obtain an intermediate product.

[0042] Step 3: Put the obtained intermediate product into an argon atmosphere furnace, first raise the temperature to 350°C at a rate of 10°C / min and carbonize it for 105 minutes, then raise the temperature to 1000°C at a rate of 10°C / min and catalyze graphitization 105min.

[0043] Step 4: Put the product after catalytic graphitization into an argon atmosphere furnace, load water vapor into the reaction furnace through argon, and the to...

Embodiment 3

[0045] A method for preparing a multi-level structure carbon material, comprising the following steps:

[0046] Step 1: Prepare a nickel nitrate solution with a concentration of 0.3 mol / L, weigh 30 g of algae, and soak it in the nickel salt solution for 25 hours.

[0047] Step 2: Pulverize the soaked algae with a mixer for 8 minutes, centrifuge the algae slurry at a speed of 8500 r / min for 5 minutes to obtain a precursor, and freeze-dry it at a temperature of -55°C and an air pressure of 30 Pa for 35 hours to obtain an intermediate product.

[0048] Step 3: Put the obtained intermediate product into an argon atmosphere furnace, first raise the temperature to 400°C at a heating rate of 10°C / min and carbonize at this temperature for 120 minutes, then raise the heating rate to 1200°C at a heating rate of 10°C / min and Catalyzed graphitization at this temperature for 120 min.

[0049] Step 4: Put the product after catalytic graphitization into an argon atmosphere furnace, load water...

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Abstract

A method for preparing a hierarchical carbon material by using algal plant as a carbon source comprises the following steps: using algae as a carbon source and immersing the algae in a metallic nickel saline solution, freeze-drying, carrying out low-temperature carbonization, carrying out high-temperature graphitization, and carrying out activating treatment by introducing water vapor so as to obtain the hierarchical carbon material. By carbonization treatment, algae are converted into carbon so as to provide a carbon source for growth of a nano-carbon material, and simultaneously, metallic nickel salt is converted into nickel oxide to be uniformly dispersed on the surface of the carbon material. During the high-temperature treatment process, nickel oxide is converted into nickel nanoparticles, thus being beneficial to catalytic graphitization of the carbon material and raising orderness of the hierarchical carbon material. The activation treatment is helpful for regulating and controlling size and structure of pores on the surface of the carbon material. The preparation method of the hierarchical carbon material has advantages as follows: operation process is simple; preparation period is short; raw materials are easily available; cost is low; and relevant products have characteristics of high specific surface area and high graphitization degree, and can be applied to a lithium ion battery and a supercapacitor.

Description

technical field [0001] The invention belongs to the technical field of preparation of biomass carbon materials, and in particular relates to a method for preparing multi-level structure carbon materials by using algae plants as carbon sources. Background technique [0002] Carbon materials are important structural materials and functional materials. Due to their excellent heat resistance, high thermal conductivity, good chemical inertness, and high electrical conductivity, they are widely used in metallurgy, chemical industry, machinery, electronics, aviation and other fields. In recent years, due to the shortage of fossil resources, the development and application of carbon materials have been greatly restricted. Biomass renewable resources such as forestry biomass, agricultural waste and aquatic plants have become substitutes for fossil resources. And the vast majority of biomass resources are rich in carbon elements, which are rich raw materials for the preparation of va...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/205C01B32/05
CPCC01P2002/72C01P2004/03C01P2006/12
Inventor 李翠艳弓琴琴欧阳海波黄剑锋孔新刚曹丽云费杰
Owner SHAANXI UNIV OF SCI & TECH