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Preparation method of porous carbon material based on ionic heat process

A porous carbon, ionothermal technology, applied in the preparation/purification of carbon, to achieve excellent self-template porosity, low energy consumption, and good chemical and thermal stability.

Active Publication Date: 2013-11-20
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation of this ionothermal strategy in carbon materials has rarely been reported.

Method used

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  • Preparation method of porous carbon material based on ionic heat process
  • Preparation method of porous carbon material based on ionic heat process
  • Preparation method of porous carbon material based on ionic heat process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The structure of the ionic liquid used in this example is shown in the following formula (IL-a):

[0029]

[0030] Add 1g of sucrose and 10ml of ionic liquid (IL-a) into a 50ml beaker, heat slowly and stir to dissolve. The resulting solution was transferred to a reaction kettle, heated to 160°C, and reacted for 12 hours. After the reaction is finished, the product is washed with distilled water, then suction-filtered, and the corresponding porous carbon material is obtained after drying. The scanning electron microscope image of the obtained porous carbon material is shown in figure 1 , the product is an irregular massive structure. The specific surface area of ​​the product is less than 10m 2 / g, indicating that [Bmim][FeCl 3 ] The high specific surface area carbon material obtained as a solvent should be considered as an iron-catalyzed carbonization process, and its pore-forming mechanism is completely different from the ionothermal process of the present inven...

Embodiment 2

[0032] The structure of the ionic liquid used in this example is shown in the following formula (IL-b):

[0033]

[0034] Add 3g fructose and 20ml ionic liquid (IL-b) into a 25ml beaker, stir to dissolve. The resulting solution was transferred to a reaction kettle, heated to 230 degrees, and reacted for 32 hours. After the reaction is finished, the product is washed with distilled water, then suction-filtered, and the corresponding porous carbon material is obtained after drying. The scanning electron microscope image of the porous carbon material is shown in figure 2 As shown, the product has a micron-scale spherical structure from the analysis of the results of the electron microscope, and the diameter of the carbon sphere is about 2-5 microns, see below figure 2 . The specific surface area of ​​its products is 26m 2 / g. Compared with Example 1, it can be concluded that the ionic liquid used has a great influence on the morphology of the product, and only increasing...

Embodiment 3

[0036] The structure of the ionic liquid used in this example is shown in the following formula (IL-c):

[0037]

[0038] Add 6g of cellulose and 15ml of ionic liquid (IL-c) into a 50ml beaker, stir to dissolve. The resulting solution was transferred to a reaction kettle, heated to 170°C, and reacted for 18 hours. After the reaction is finished, the product is washed with distilled water, then suction-filtered, and the porous carbon material is obtained after drying. The transmission electron microscopy results of the porous carbon material are as follows: image 3 As shown, the product is composed of 50-150nm carbon spheres analyzed from the electron microscope results. The carbon material was subjected to 77K low-temperature nitrogen adsorption test, as shown in Figure 4 , indicating that the specific surface area of ​​the obtained product can reach 117m 2 / g. By comparing with Example 2, it can be found that the type of ionic liquid solvent has a decisive influence...

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Abstract

The invention discloses a preparation method of a porous carbon material based on an ionic heat process. The preparation method comprises the following steps: (1) adding a biological material into ionic liquid to form a mixed solution, wherein the ionic liquid consists of anions and cations, and the cations are one of formulas (I) to (IV); and (2) heating the solution to 140 to 260 DEG C, preserving heat for 10 to 48 hours, cooling and performing aftertreatment to obtain the porous carbon material. According to the preparation method of the porous carbon material based on the ionic heat process, the preparation process is simple, energy consumption is low, any severe conditions are not needed, products are easy to purify, the product structure is easy to adjust, and a great potential application value is achieved.

Description

technical field [0001] The invention relates to a method for preparing a carbon material, in particular to a method for preparing a porous carbon material based on an ion thermal process. Background technique [0002] With the discovery of new carbon materials such as fullerenes, carbon nanotubes and graphene, scientists are increasingly aware of the important role of porous carbon materials in scientific development and human progress. Porous carbon materials have high chemical stability, high specific surface area, controllable pore structure, designable elemental composition and good electrical properties. Due to its excellent performance and wide application in the fields of chemistry, electronics and aviation, porous carbon materials have attracted great attention; material scientists have been looking for effective and green means to introduce rich pore structures into carbon materials . [0003] There are many methods for preparing porous carbon materials, such as c...

Claims

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Application Information

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IPC IPC(8): C01B31/02C01B32/05
Inventor 王勇张鹏飞
Owner ZHEJIANG UNIV
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