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Preparation method and application of monodisperse hydrothermal carbon spheres

A hydrothermal carbon, monodisperse technology, applied in the field of materials, can solve problems such as difficult to achieve industrialization and green environmental protection

Pending Publication Date: 2021-09-03
赵昆
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the direction of promoting a more stable synthesis of highly monodisperse, homogeneous saccharide aggregates, it is difficult to use surfactant-controlled synthesis, two-step seed growth methods, and more complex reactor pressure-controlled synthesis methods. Realize simple industrialization and green production requirements

Method used

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  • Preparation method and application of monodisperse hydrothermal carbon spheres
  • Preparation method and application of monodisperse hydrothermal carbon spheres
  • Preparation method and application of monodisperse hydrothermal carbon spheres

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 1) Prepare a glucose solution with a concentration of 0.25M (V 水 :V 乙醇 =30:1);

[0042] 2) Take 60 mL of the glucose solution with the above concentration, put it into an autoclave, seal it, heat it to 180°C for 8 hours, and cool it down to room temperature naturally after the reaction to obtain a glucose hydrothermal carbon sphere solution.

[0043] 3) The above solution is separated by gradient centrifugation at 25,000r / min to 3,000r / min, and repeatedly ultrasonically dispersed with absolute ethanol and deionized water, and centrifugally washed until the supernatant is clear, transparent and colorless.

[0044] Conclusion: if figure 1 As shown, through gradient centrifugation, the particle size distribution range of carbon spheres with a size of 0.45-0.71 μm can be obtained, the statistical average size is 0.60 μm, and the surface of carbon spheres is relatively rough.

Embodiment 2

[0046] 1) Prepare a glucose solution with a concentration of 0.25M (V 水 :V 乙醇 =30:1);

[0047] 2) Take 60 mL of the glucose solution with the above concentration, put it into an autoclave, seal it, heat it to 180°C for 8 hours, and cool it down to room temperature naturally after the reaction to obtain a glucose hydrothermal carbon sphere solution.

[0048] 3) The above solution was separated by gradient centrifugation at 6000r / min, and repeatedly ultrasonically dispersed with absolute ethanol and deionized water, and centrifugally washed until the supernatant was clear, transparent and colorless.

[0049] Conclusion: if figure 2 As shown, the particle size distribution range of carbon spheres with a size of 0.2-0.6 μm can be obtained, the statistical average size is 0.33 μm, and the surface of carbon spheres is relatively rough. Compared with Example 1, it can be seen that hydrothermal carbon spheres of different sizes can be separated by controlling the centrifugation ra...

Embodiment 3

[0051] 1) Prepare a glucose solution with a concentration of 0.25M (V 水 :V 乙醇 =15:1);

[0052] 2) Take 60 mL of the glucose solution with the above concentration, put it into an autoclave, seal it, heat it to 180°C for 8 hours, and cool it down to room temperature naturally after the reaction to obtain a glucose hydrothermal carbon sphere solution.

[0053] 3) The above solution was separated by gradient centrifugation at 6000r / min, and repeatedly ultrasonically dispersed with absolute ethanol and deionized water, and centrifugally washed until the supernatant was clear, transparent and colorless.

[0054] Conclusion: if image 3 As shown, the particle size distribution range of carbon spheres with a size of 0.15-0.5 μm can be obtained, the statistical average size is 0.38 μm, and the surface of carbon spheres is relatively rough. Compared with Example 2, it can be found that the size and particle size distribution of hydrothermal carbon spheres can be changed when only the...

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Abstract

The invention discloses a preparation method of nano-to-micron monodisperse hydrothermal carbon spheres. The preparation method comprises the following steps: preparing an aqueous solution of monosaccharide or polysaccharide; adding a weakly polar or non-polar micromolecular solvent into the aqueous solution as a regulating agent to obtain a mixed solution; and performing hydrothermal reaction on the mixed solution to obtain the hydrothermal carbon spheres. The simple small-molecule solvent is used as a regulating agent to inhibit the growth rate of crystal nucleus and control the formation process of the interface of the hydrothermal carbon sphere, so that the cross-linking reaction of a single hydrothermal carbon sphere is effectively avoided, and then the monodisperse carbon sphere with controllable nano-to-micron size is induced and synthesized; and the method has the advantages of being excellent in controllability and reproducibility, quite low in price, easy to obtain, environmentally friendly, capable of achieving large-scale production and the like.

Description

technical field [0001] The invention belongs to the field of material technology, and in particular relates to a preparation method and application of monodisperse hydrothermal carbon spheres with precise and controllable nanometer to micron size. Background technique [0002] Compared with polyaniline pellets, polystyrene pellets and related polymer pellets synthesized by the Stober method, biomass raw materials can be used as synthetic surface group controllable, multifunctional nano-microsaccharide molecule hydrothermal carbon spheres, which have Better chemical stability, thermal stability, environmental protection, biocompatibility and other advantages unmatched by other spherical structure materials. Also as a template material, sugar molecular hydrothermal carbon spheres have better ion adsorption properties and a sintered shell structure. Controllable size, uniformity, and monodispersity, as well as wide reaction time windows and scale production have not been achie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05C01B32/15C01B33/12B01J20/28B01J20/20B01D15/08
CPCC01B32/05C01B32/15C01B33/12B01J20/28019B01J20/20B01D15/08C01P2004/80C01P2004/04
Inventor 赵昆张卫平赵惠军安太成
Owner 赵昆
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