Method for preparing porous nano carbon materials with biomass serving as carbon source

A nano-carbon material and biomass technology, which is applied in the field of preparing porous nano-carbon materials, can solve the problems of complex process, high production cost, and high price, and achieve the effect of cheap and easy-to-obtain materials, low production cost, and less pollution

Inactive Publication Date: 2014-10-15
HEILONGJIANG UNIV
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AI-Extracted Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of high production cost, high price, complex process, low specific surface area of ​​the produced nano-carbon material and poo...
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Method used

The porous nano-carbon prepared by present embodiment, specific surface area can reach 1600m / g; The porous nano-carbon material prepared by this method is used for the electrode material of super capacitor, and specific capacitance can reach 300F/g under the current density of 1Ag-1 g. This embodiment synthesizes porous nano-carbon materials with high specific surface area through a simple heat treatment method. Compared with the industrial method above 2000 ° C, the reaction temperature is 600-1400 ° C, less energy is required...
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Abstract

The invention relates to a method for preparing porous nano carbon materials with biomass serving as a carbon source, particularly to a method for preparing nano carbon materials with biomass fasciculus vascularis luffae serving as the carbon source, and solves the problems that methods for preparing existing nano carbon materials are complex in technological process and higher in preparation cost and the prepared nano carbon materials are low in specific surface area and poorer in stored energy. The preparation method comprises the steps as follows: I, pretreatment of the fasciculus vascularis luffae; II, activation and drying of the fasciculus vascularis luffae; III, heat treatment under inert gases; IV, treatment with an acid leaching method. Compared with the existing nano carbon materials, the porous nano carbon materials prepared with the biomass fasciculus vascularis luffae serving as the carbon source have the advantages that the specific surface area is significantly increased, and the materials have good electrochemical performance; the method is simple in experimental process, and large-scale industrial production can be realized by the aid of biological resources.

Technology Topic

FasciculusBiomass +8

Image

  • Method for preparing porous nano carbon materials with biomass serving as carbon source
  • Method for preparing porous nano carbon materials with biomass serving as carbon source
  • Method for preparing porous nano carbon materials with biomass serving as carbon source

Examples

  • Experimental program(31)

Example Embodiment

[0023] Specific embodiment 1: The method for preparing porous nano-carbon material using biomass as a carbon source in this embodiment specifically operates as follows:
[0024] 1. Weigh the loofah first, and then calcinate it to a black fibrous shape under an inert gas atmosphere at a temperature of 200-600°C. The calcining time is 30-60 minutes for pre-carbonization;
[0025] 2. Add an activator to the pre-carbonized loofah in step 1, and stir for 4-10h at a temperature of 30-50℃ and a stirring speed of 50-300r/min to obtain a precursor; the precursor will then be generated Dry for 6-12h at 50-100℃ to obtain the intermediate product; among them, the mass ratio of loofah to activator is 1:1-5;
[0026] 3. The intermediate product obtained in step 2 is subjected to heat treatment to obtain the product. The heat treatment conditions are as follows: at a heating rate of 1 to 20°C/min, the temperature is raised to 600 to 1400°C, and the inert gas flow rate is 30 to 200 mL Under the condition of /min, heat treatment for 30min~6h;
[0027] 4. Treat the product obtained in step 3 with acid leaching method, then wash the product after acid leaching method to pH 7.0 with distilled water, and dry it at 60~150℃ for 6~10h, or vacuum dry at 40~80℃ After 6-10 hours, the final product is obtained, which is the preparation of porous nano-carbon materials using biomass as a carbon source.
[0028] The porous nano carbon prepared in this embodiment has a specific surface area of ​​up to 1600 m 2 /g; The porous nano-carbon material prepared by this method is used as the electrode material of supercapacitors. -1 The specific capacitance can reach 300F/g under the current density This embodiment synthesizes porous nano-carbon materials with a high specific surface area through a simple heat treatment method. Compared with industrial methods above 2000°C, the reaction temperature is 600-1400°C, less energy is required, and the required equipment is simple and easy to operate. , The production cost is low. The carbon source of this embodiment is loofah, which is a kind of biomass nano-carbon material. Loofah is a plant with network fibers that grows in large numbers and concentratedly in most provinces in southern my country. Pollution, low-cost and easy-to-obtain materials, low carbon and environmental protection, etc., make it show huge advantages compared with other types of new energy storage materials (polymers, metal oxides and hydroxides).

Example Embodiment

[0029] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the pre-carbonization temperature in step 1 is any temperature within the range of 200 to 600°C. Others are the same as the first embodiment.

Example Embodiment

[0030] Specific embodiment three: This embodiment is different from specific embodiment one or two in that the pre-carbonization temperature in step one is 300-500°C. Others are the same as the first or second embodiment.
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PUM

PropertyMeasurementUnit
Specific surface area1600.0m²/g
Specific capacitance300.0F/g
Capacitance300.0F/g
tensileMPa
Particle sizePa
strength10

Description & Claims & Application Information

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