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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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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  • 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

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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 con...

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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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.

Description

technical field [0001] The invention relates to a method for preparing a porous nano-carbon material by using biomass as a carbon source. Background technique [0002] Energy is the material basis of human activities. In a sense, the development of human society is inseparable from the use of high-quality energy. However, with the depletion of primary energy such as coal, crude oil, and natural gas, how to efficiently utilize existing energy and store it reasonably has become a research hotspot, so people urgently need to find a high-performance new energy storage material. [0003] Due to its excellent chemical stability, electrical conductivity, and low-temperature oxidation resistance, nano-carbon materials have important applications in energy storage fields such as lithium-ion batteries, supercapacitors, and fuel cells. In the past few years, the traditional nano-carbon materials that have been studied more include activated carbon, carbon nanotubes, graphene and thei...

Claims

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Application Information

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IPC IPC(8): C01B31/02
Inventor 付宏刚栾玉婷蒋保江郭世恩郝蓉王蕾
Owner HEILONGJIANG UNIV
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