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Preparation process of porous carbon nanospheres

A preparation process and technology of nanospheres, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of easily destructible carbon precursor self-assembled overall morphology, environmental pollution, etc., to achieve overall Good appearance, less pollution, and convenient for industrial production

Active Publication Date: 2019-12-17
ANHUI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a preparation process of porous carbon nanospheres, which solves the problem of using a large amount of ZnCl under high-salt conditions in the prior art. 2 The large-scale leading to porous carbon easily destroys the overall morphology of carbon precursor self-assembly, and also brings serious environmental pollution

Method used

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  • Preparation process of porous carbon nanospheres
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  • Preparation process of porous carbon nanospheres

Examples

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Embodiment 1

[0035] The embodiment of the present invention provides a preparation process of porous carbon nanospheres, comprising the following steps:

[0036] S1, take 150mg ZnCl 2 The solid was dissolved in 300 mL of deionized water to obtain a ZnCl concentration of 0.5 mg / mL 2 solution;

[0037] S2, to ZnCl 2 Add 150mg 2,6-diaminopyridine to the solution, and stir until completely dissolved (ZnCl 2 The mass ratio of solid to 2,6-diaminopyridine is 1:1);

[0038] S3. Add 225 uL of formaldehyde with a mass percent concentration of 37-40% to the solution obtained in S2, and stir at room temperature for 18 hours until the reaction is complete to obtain solution A;

[0039] S4. Centrifuge the solution A to obtain a centrifuged precipitate, collect the centrifuged precipitate and put it in an oven for drying at 60° C. to obtain a polytriazine;

[0040] S5. Place the polytriazine in a tube furnace, and calcinate it at 600° C. for 5 hours in a nitrogen atmosphere, then raise the temperat...

Embodiment 2

[0043] The embodiment of the present invention provides a preparation process of porous carbon nanospheres, comprising the following steps:

[0044] S1, take 300mg ZnCl 2 The solid was dissolved in 300 mL of deionized water to obtain a ZnCl concentration of 1 mg / mL 2 solution;

[0045] S2, to ZnCl 2 Add 150mg 2,6-diaminopyridine to the solution, and stir until completely dissolved (ZnCl 2 The mass ratio of solid to 2,6-diaminopyridine is 2:1);

[0046] S3. Add 225 uL of formaldehyde with a mass percent concentration of 37-40% to the solution obtained in S2, and stir at room temperature for 18 hours until the reaction is complete to obtain solution A;

[0047] S4. Centrifuge the solution A to obtain a centrifugal precipitate, collect the centrifugal precipitate and put it in an oven for drying at a temperature of 60° C. to obtain a polytriazine;

[0048] S5. Place the polytriazine in a tube furnace, and calcinate it at 600° C. for 5 hours in a nitrogen atmosphere, then rai...

Embodiment 3

[0051]The embodiment of the present invention provides a preparation process of porous carbon nanospheres, comprising the following steps:

[0052] S1, take 600mg ZnCl 2 The solid was dissolved in 300 mL deionized water to obtain a ZnCl concentration of 2 mg / mL 2 solution;

[0053] S2, to ZnCl 2 Add 150mg2,6-diaminopyridine to the solution, and stir until completely dissolved (ZnCl 2 The mass ratio of solid to 2,6-diaminopyridine is 4:1);

[0054] S3. Add 225 uL of formaldehyde with a mass percent concentration of 37-40% to the solution obtained in S2, and stir at room temperature for 18 hours until the reaction is complete to obtain solution A;

[0055] S4. Centrifuge the solution A to obtain a centrifuged precipitate, collect the centrifuged precipitate and put it in an oven for drying at 60° C. to obtain a polytriazine;

[0056] S5. Place the polytriazine in a tube furnace, and calcinate it at 600° C. for 5 hours in a nitrogen atmosphere, then raise the temperature to ...

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Abstract

The invention discloses a preparation process of porous carbon nanospheres, and the preparation process comprises the following steps: s1, preparing a ZnCl2 solution; s2, adding 2, 6-diaminopyridine into the ZnCl2 solution, and stirring until the 2, 6-diaminopyridine is completely dissolved; s3, adding formaldehyde into the solution prepared in the step S2 until the reaction is complete so as to obtain a solution A; s4, carrying out centrifugal treatment on the solution A, and drying a centrifugal precipitate to obtain polytriazine; s5, calcining the polytriazine to obtain a carbonized productB; and s6, washing and drying the carbonized product B to obtain the porous carbon nanospheres; wherein the concentration of the ZnCl2 solution is more than 0.5 mg / mL and less than 4mg / mL. Accordingto the invention, the ZnCl2 solution with a relatively low concentration, the 2, 6-diaminopyridine and formaldehyde are polymerized to form polytriazine nanospheres as a carbon precursor, ZnCl2-containing polytriazine is carbonized, carbonization and foaming processes are carried out at the same time, the polytriazine is converted into porous carbon nanospheres C-PFZ, the surface of the formed C-PFZ is free of collapse and good in overall morphology, and meanwhile, the formed C-PFZ shows excellent electrochemical performance as an EDLC electrode.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, and in particular relates to a preparation process of porous carbon nanospheres. Background technique [0002] With the rapid development of electronic information technology, the upgrading speed of digital electronic products is getting faster and faster, which also drives the growth of capacitor industry. [0003] The global supercapacitor market has been growing rapidly over the past decade. Activated carbon is widely used in supercapacitors due to its low cost, good electrochemical stability, good electronic conductivity, and large surface area. In this case, porous carbon spheres (PCS) combine the advantages of carbon materials with spherical colloids, which endow them with some unique features, such as regular geometry, good fluidity and tunable porosity and controllable particle size distribution. The entire electrochemical community has therefore devoted considerable effort to th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/348C01B32/312B82Y30/00B82Y40/00
CPCC01B32/348C01B32/312B82Y30/00B82Y40/00
Inventor 黄新华朱杏杏
Owner ANHUI UNIV OF SCI & TECH
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