A kind of large and micro double-hole carbon film material and preparation method thereof

A technology of thin-film carbon and composite materials, which is applied in the field of material chemistry, can solve the problems of cumbersome carbonization pore expansion procedures, difficult removal of template agents, and easy collapse of morphology, and achieve the goals of green, energy-saving and environmental protection in the process, simple preparation methods, and great application potential. Effect

Active Publication Date: 2018-11-16
GUANGXI UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a large and micro double-hole film carbon material and its preparation method to solve the problems of difficult removal of traditional template agents and cumbersome carbonization pore expansion procedures
In the high temperature carbonization process of the present invention, the composite material CaCO 3 Calcium carbonate in @PDA not only acts as a shape support, but the CO released by its pyrolysis 2 It also has the effect of high-efficiency pore expansion; the method of the present invention solves the problems of difficult removal and easy collapse of the shape of the traditional spherical template agent, and at the same time avoids the problem of secondary carbonization and the need to introduce a pore expander

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  • A kind of large and micro double-hole carbon film material and preparation method thereof
  • A kind of large and micro double-hole carbon film material and preparation method thereof
  • A kind of large and micro double-hole carbon film material and preparation method thereof

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Embodiment 1

[0040] A method for preparing a large and micro double-hole thin film carbon material, comprising the following steps:

[0041] (1) Synthesis of hollow spherical calcium carbonate

[0042] Prepare concentration 20g·L respectively -1 Polyvinylpyrrolidone (PVP) aqueous solution 600mL, concentration 0.1mol L -1 Calcium Chloride (CaCl 2 ) aqueous solution 800mL, concentration 0.1mol L -1 of sodium carbonate (Na 2 CO 3 ) 800mL aqueous solution and a concentration of 0.05mol L -1 600mL of sodium dodecylsulfonate (SDS) aqueous solution, four different solutions were sealed and stirred evenly; two parts (300mL each) of the prepared PVP solution were added to the prepared CaCl 2 solution and Na 2 CO3 In the solution, under the condition of 20℃ water bath, stir vigorously for 0.5h; then add the prepared SDS solution to the above Na 2 CO 3 solution, stirred vigorously for 0.5h; the above CaCl 2 Add Na to the solution 2 CO 3 In the mixed solution, the temperature of the water ...

Embodiment 2

[0048] Except following change, all the other are the same as embodiment 1.

[0049] The preparation concentration is 3g·L -1 Dopamine salt (DA) aqueous solution 100mL, concentration 8g·L -1 Hollow spherical calcium carbonate aqueous solution 50mL, that is, the weight ratio is 0.75DA / 1.0CaCO 3 dopamine salt and hollow spherical calcium carbonate, and a weakly alkaline solution prepared by 0.75mL ammonia water, 40mL ethanol, and 90mL deionized water. The three different solutions were sealed and stirred evenly; the prepared calcium carbonate aqueous solution was added to the dopamine salt solution In water bath temperature 15°C, stirring speed 150r·min -1 Under the condition of 0.5h, the prepared weak alkaline solution was added to the dopamine salt mixed solution, the reaction temperature and rotation speed were kept constant, and the intermediate product CaCO was obtained after 20h reaction. 3 @PDA;

[0050] Weigh a certain mass of CaCO 3 The @PDA sample is placed in a t...

Embodiment 3

[0052] Except following change, all the other are the same as embodiment 1.

[0053] The preparation concentration is 6g·L -1 Dopamine salt (DA) aqueous solution 100mL, concentration 8g·L -1 Hollow spherical calcium carbonate aqueous solution 50mL, that is, the weight ratio is 1.5DA / 1.0CaCO 3 dopamine salt and hollow spherical calcium carbonate, and a weakly alkaline solution prepared by 0.75mL ammonia water, 40mL ethanol, and 90mL deionized water. The three different solutions were sealed and stirred evenly; the prepared calcium carbonate aqueous solution was added to the dopamine salt solution In the water bath temperature 25 ℃, stirring speed 300r min -1 Under the condition of 0.5h, the prepared weak alkaline solution was added to the dopamine salt mixed solution, the reaction temperature and rotation speed were kept constant, and the intermediate product CaCO was obtained after 20h reaction. 3 @PDA;

[0054] Weigh a certain mass of CaCO 3 The @PDA sample is placed in ...

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Abstract

The invention discloses a novel macro- and micro-porous thin film carbon material and a preparation method of same. The method includes the steps of supporting polydopamine thin film on hollow spherical calcium carbonate as a template agent; performing high-temperature carbonization to obtain an inter-product CaO@S-HFGB; washing the CaO@S-HFGB in water to neutral and filtering the liquid to obtain a filter cake; and drying the filter cake to produce the novel macro- and micro-porous thin film carbon material. During the high-temperature carbonization, the hollow spherical calcium carbonate is decomposed and releases CO2, which has high effect on pore enlarging, so that secondary carbonization and requirement of introduction of a pore enlarging agent are avoided. The method can produce the porous carbon material S-HFGB just through one-step carbonization. The method is simple, is green, energy-saving and environment-friendly, and has great application potential in industrialization.

Description

technical field [0001] The invention belongs to the technical field of material chemistry, and in particular relates to a large and micro double-hole film carbon material and a preparation method thereof. Background technique [0002] As an environmentally friendly material, porous carbon materials are extremely useful in gas adsorption, supercapacitors, and catalyst supports due to their low price, high specific surface area, modifiable pore structure, and excellent thermal stability. Great application potential. Porous carbon materials with special morphology and structure exhibit excellent performance in applications such as gas separation, drug sustained release, and catalysis, making their related preparation a research hotspot for scientists. [0003] The hard template method is a common and effective method for synthesizing porous carbon materials. It generally consists of the following steps: (1) immersing the carbon precursor in the template agent; (2) allowing the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/05
CPCC01P2002/72C01P2004/03C01P2004/04C01P2006/12
Inventor 童张法赵祯霞贺鑫朱梅萍韦藤幼曾美琪尹大伟石仁凤
Owner GUANGXI UNIV
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