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A kind of preparation method of conductive carbon material with graphene-like structure

A technology of graphene and conductive carbon, which is applied in the direction of nano-carbon, carbon-silicon compound conductors, nanotechnology, etc., can solve the problems of sepiolite layered structure and pore performance, such as insufficient utilization and development, and achieve improved diffusion and transmission capabilities and rich resources , the effect of improving the electrical conductivity

Inactive Publication Date: 2015-09-30
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides a method for preparing a conductive carbon material with a graphene-like structure, which solves the problem of insufficient utilization and development of the layered structure and channel properties of sepiolite in the prior art

Method used

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  • A kind of preparation method of conductive carbon material with graphene-like structure

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preparation example Construction

[0017] The preparation method of the conductive carbon material of the graphene-like structure of the present invention is implemented according to the following steps:

[0018] Step 1: Weigh sepiolite powder, sucrose and deionized water according to the mass ratio of 1:2:4-10, mix the sepiolite powder, sucrose and deionized water evenly, and then ultrasonically disperse for 20-60min, Microwave heating for 3-9min, (the microwave frequency is 2450MHz±50MHz, the working voltage is 220V, and the power is 100W-300W), and placed in a concentrated sulfuric acid dryer with a mass fraction of 98.3% for 24-144h; in this step, sucrose Converted to caramel by microwave heating;

[0019] Step 2, carbonization is carried out in a protective gas atmosphere, the carbonization temperature is 500°C-900°C, and the carbonization time is 1-3h; the protective gas is at least one of nitrogen and an inert gas; the caramel is layered in the sepiolite. carbonization on the skeleton;

[0020] Step 3,...

Embodiment 1

[0022] A preparation method of a nano-conductive carbon material of a graphene-like structure, comprising the following steps:

[0023] Mix 6.6 grams of sucrose and 3.3 grams of sepiolite in 25 ml of deionized water, stir into a paste, and then ultrasonically disperse for 30 minutes, then place it in a microwave reactor, react for 9 minutes, and put in a 98.3% concentrated solution. Sulfuric acid dryer for 48 hours. It was placed in a tube furnace and heated to 600 degrees Celsius under nitrogen protection, and carbonized for 1 hour. Washing with 20% hydrochloric acid by volume and 20% hydrofluoric acid by volume alternately washed 3 times, each washing time is 1 hour, and finally washed with deionized water to neutral pH, and the product is dried to obtain nano-conductive carbon with graphite-like structure. Material.

[0024] like figure 1 As shown, the Raman spectrum characterization of this example 1 shows that the material has obvious D peak and G peak, and the specifi...

Embodiment 2

[0026] A preparation method of a nano-conductive carbon material of a graphene-like structure, comprising the following steps:

[0027] Mix 4.4 g of sucrose and 2.2 g of sepiolite in 20 ml of deionized water, stir into a paste, and ultrasonically disperse for 25 minutes, then place in a microwave oven, react for 7 minutes, and put it in a 98.3% concentrated sulfuric acid desiccator. placed for 96h. It was placed in a tube furnace and heated to 700 °C for 1.5 h under nitrogen protection. Washing with hydrochloric acid with a volume concentration of 20% and hydrofluoric acid with a volume concentration of 15% alternately for 3 times, each washing time is 1 h, and finally with deionized water until the effluent is neutral, and the product is dried to obtain a graphite-like structure. Nano conductive carbon material.

[0028] The Raman spectrum characterization of this example 2 shows that the material has obvious D peak and G peak, and the specific surface area of ​​the product...

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Abstract

The invention discloses a preparation method of a conductive carbon material with a graphene-like structure, which comprises the following steps: 1)uniformly mixing meerschaum powder, cane sugar and deionized water, then performing ultrasonic dispersion, performing microwave heating and drying; in the step, cane sugar is conversed to caramel through microwave heating; 2)carbonizing under protective gas atmosphere, carbonizing the caramel on a meerschaum layered frame; and 3)employing hydrofluoric acid and hydrochloric acid for alternatively acidifying and washing after carbonizing the meerschaum, employing deionized water for washing meerschaum and fully drying to obtain the conductive carbon material with the graphene-like structure. The conductive carbon material with the graphene-like structure has high specific surface area, and can be used as capacitor materials, lithium ion battery electrode materials and adsorption materials.

Description

technical field [0001] The invention belongs to the technical field of preparation of layered conductive carbon materials, and relates to a preparation method of a conductive carbon material with a graphene-like structure. Background technique [0002] Sepiolite is a hydrous magnesium-rich silicate mineral with a layered chain structure. It contains small units of layered structure in the chain structure. Aggregate, the color is usually white, light gray, light yellow, etc., opaque and not shiny. The structure of sepiolite is orthorhombic or monoclinic, and its standard crystal chemical formula is Mg 8 (H 2 O) 4 [Si 6 O 16 ] 2 (OH) 4 ·8H 2 O, where SiO 2 The content is between 54%-60%, the MgO content is in the range of 21%-25%, the hardness is 2-3, the body is light, and the density is 1-2.5g / cm 3 , smooth touch and sticky tongue, brittle in dry state, low shrinkage, good plasticity. Because of its large specific surface area, about 300m 2 / g, thus showing a str...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/02H01B1/04B82Y40/00C01B32/15
Inventor 杨蓉邓坤发刘晓艳赵青雷京曲冶
Owner XIAN UNIV OF TECH