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Method for preparing small solid carbon ball and carbon ball prepared thereby

A small-scale, solid technology that can be used in carbon preparation/purification, nanotechnology for materials and surface science, nanotechnology, etc., and can solve problems such as low specific surface area, confinement of carbon spheres, etc.

Active Publication Date: 2014-06-04
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Falco et al. studied the process of hydrothermally treating glucose to prepare carbon spheres. The diameter of carbon spheres obtained at 160°C for 24 hours was 474nm, and the diameter of carbon spheres obtained at 260°C for 24 hours was 685nm, and these carbon spheres had only a few Low specific surface area (2 / g), which greatly limits the application of carbon spheres in catalysis, drug loading, water treatment, etc. (Green Chem.2011,13,3273-3281)

Method used

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  • Method for preparing small solid carbon ball and carbon ball prepared thereby
  • Method for preparing small solid carbon ball and carbon ball prepared thereby
  • Method for preparing small solid carbon ball and carbon ball prepared thereby

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Add 6g of glucose and 45ml of deionized water into a 50ml beaker, stir to dissolve. Then add 1 g of polymeric ionic liquid PIL-a (shown in the structure below), and dissolve in the above glucose solution. The resulting solution was transferred to a reaction kettle, heated to 150°C, and reacted for 16 hours. After the reaction is finished, the product is washed with distilled water, then suction filtered, and the small-sized carbon spheres are obtained after drying. The scanning electron microscope image of the obtained carbon spheres is shown in figure 1 and figure 2 shown. According to the results of electron microscopy, the size of carbon spheres is in the range of 30-55nm. figure 2 The distance between the two straight lines in is 32.33 nm, which is the diameter of one of the representative carbon spheres prepared.

[0028] The preparation steps of PIL-a are as follows: monomer 1-vinyl-3-propyl imidazole chloride 8g, free radical initiator azobisisobutyronitri...

Embodiment 2

[0031] Add 10g of sucrose and 50ml of deionized water into a 50ml beaker, stir to dissolve. Then add 1 g of polymeric ionic liquid PIL-b (shown in the structure below), and dissolve in the above sucrose solution.

[0032]

[0033] 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 small-sized carbon spheres are obtained after drying. The size of the carbon spheres was analyzed from the electron microscope results in the range of 34-66nm.

Embodiment 3

[0035] Add 6g of glucose and 45ml of deionized water into a 50ml beaker, stir to dissolve. Then 1 g of polymeric ionic liquid PIL-b (same as Example 2) was added and dissolved in the above glucose solution. The resulting solution was transferred to a reaction kettle, heated to 150°C, and reacted for 24 hours. After the reaction is finished, the product is washed with distilled water, then suction filtered, and the small-sized carbon spheres are obtained after drying. The size of the carbon spheres was analyzed from the electron microscope results in the range of 45-64nm. The low-temperature nitrogen adsorption test shows that the BET specific surface area of ​​the obtained small-sized carbon spheres can reach 129m 2 / g, see below image 3 .

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Abstract

The invention discloses a method for preparing a small solid carbon ball. The method comprises the following steps: (1) dissolving sugar compound and polymerized ionic liquid into water to form mixed solution; and (2) heating the mixed solution obtained in step (1) to 140-260 DEG C, preserving the heat for 10 to 48h, and then treating to obtain the solid carbon ball of which the diameter is less than or equal to 80nm. Compared with the conventional solid carbon ball, the method is simple in preparation process and low in energy consumption and does not need any harsh term, and the product is easy to purify; and the obtained solid carbon ball has three outstanding advantages: (1) the diameter of the carbon ball can be controlled within 80nm; (2) the prepared carbon ball has a certain specific surface area (greater than 50m<2> / g); and (3) carbon balls doped with different heteroatoms can be prepared by adding polymerized ionic liquid with different functional groups. The carbon ball with a small size but a high specific surface area has a great application value.

Description

technical field [0001] The invention relates to a method for preparing carbon spheres, in particular to a method for preparing a novel small-size solid carbon sphere with high specific surface area and the carbon sphere prepared by the method. Background technique [0002] With the discovery of new carbon materials such as carbon nanotubes, fullerenes and graphene, scientists are increasingly aware of the important role of carbon materials in scientific development and human progress. Carbon materials have high chemical stability, high specific surface area, controllable pore structure and good electrical properties. Carbon materials have broad application prospects in the fields of chemistry, electronics and aviation, and have attracted great attention. Among them, spherical carbon materials (hereinafter referred to as "carbon spheres") are often used as catalyst carrier materials, drug carriers and sustained-release materials, water purification materials, etc., and are a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/02C01B31/00B82Y30/00C01B32/05
Inventor 王勇张鹏飞
Owner ZHEJIANG UNIV
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