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Heteroatom doped carbon aerogel and preparation method thereof

A carbon aerogel and heteroatom technology, which is applied in the field of heteroatom doped carbon aerogel and its preparation, can solve the problems of complex process, high cost, long time consumption and the like, and achieves simple and controllable process, low cost, The effect of favoring volatilization

Active Publication Date: 2017-12-12
HUNAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the traditional preparation methods generally have problems such as long time-consuming, complicated process, and high cost. Therefore, the preparation method of carbon aerogels still needs to be explored and optimized.

Method used

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  • Heteroatom doped carbon aerogel and preparation method thereof
  • Heteroatom doped carbon aerogel and preparation method thereof
  • Heteroatom doped carbon aerogel and preparation method thereof

Examples

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Embodiment 1

[0040] A preparation method of nitrogen-doped carbon airgel of the present invention, comprising the following specific steps:

[0041] Weigh 1.18g Zn(NO 3 ) 2 ·6H 2 O and 0.67g 2-methylimidazole (Zn(NO 3 ) 2 ·6H 2 The molar ratio of O and 2-methylimidazole is 1:2) into a mortar, grind for 5 min, transfer to a quartz boat, heat at 5 °C / min to 150 °C for 2 h in an argon atmosphere, and then continue Heating at 5°C / min to 1000°C for 6h, followed by cooling at 5°C / min to obtain nitrogen-doped carbon aerogels.

[0042] The infrared spectrogram of the coordination polymer of zinc nitrate and 2-methylimidazole in the present embodiment is as follows figure 1 As shown, it can be seen from the figure that the N-H bond disappears, which proves that Zn-N has been coordinated. The scanning electron microscope image of the nitrogen-doped carbon airgel prepared in this example is as follows figure 2 The transmission electron microscope image is shown in image 3 shown, combined w...

Embodiment 2

[0044] A preparation method of nitrogen and sulfur co-doped carbon aerogels of the present invention, comprising the following specific steps:

[0045] Weigh 0.97g Zn(NO 3 ) 2 ·6H 2 O, 0.41g 2-methylimidazole and 0.10g 2-mercaptoimidazole (the mol ratio of 2-methylimidazole and 2-mercaptoimidazole is 5:1, Zn(NO 3 ) 2 ·6H 2 The molar ratio of O to the mixture of 2-methylimidazole and 2-mercaptoimidazole is 1:2) Put it into a mortar, grind for 5min, transfer to a quartz boat, and heat at 5°C / min in an argon atmosphere to Insulate at 150°C for 2h, then continue to heat at 5°C / min to 1000°C for 6h, then cool down at 5°C / min to obtain an ultra-thin-walled carbon aerogel co-doped with nitrogen and sulfur.

[0046] The scanning electron microscope image of the nitrogen-doped carbon airgel prepared in this example is as follows Figure 8 As shown, it can be seen from the figure that the prepared airgel material has a three-dimensional porous structure and an ultra-thin wall stru...

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Abstract

The invention discloses heteroatom doped carbon aerogel and a preparation method thereof. The method comprises the following steps: directly and evenly grinding zinc salt containing crystal water and an organic ligand containing heteroatom in a mortar, and then performing carbonization treatment on a mixed material to obtain the heteroatom doped carbon aerogel. The method disclosed by the invention achieves ultrathin-wall heteroatom doped carbon aerogel synthesis through a one-step method, and has the advantages of simple and controllable technology, short preparation period, low cost and high heteroatom doping efficiency. The heteroatom doped carbon aerogel disclosed by the invention has a three-dimensional porous structure and an ultrathin-wall structure, a specific surface area of the heteroatom doped carbon aerogel is 1028.7 to 1921.4m<2>g<-1>m<2>g<-1>, an average pore size is 0.9 to 1nm, and a wall thickness is 3 to 5nm; the heteroatom doped carbon aerogel has the advantages of ultrathin wall, large specific surface area, high porosity, multiple active sites, high atom utilization rate, large contact area with electrolyte and the like; the heteroatom doped carbon aerogel can enable a material to have good electric conductivity and high chemical reaction reactivity.

Description

technical field [0001] The invention belongs to the field of carbon airgel preparation, and in particular relates to an ultrathin-walled heteroatom-doped carbon airgel and a preparation method thereof. Background technique [0002] Airgel is a kind of dry gel material whose dispersion medium is air. Airgel contains a large amount of air, its solid phase and pore structure are nanoscale, and the porosity is above 80%. This structure not only makes airgel the solid material with the smallest density in the world, but also makes airgel show its unique properties in mechanics, acoustics, heat, optics and other aspects. Its fine nanostructure makes the thermal conductivity of the material Very low, and has excellent acoustic impedance and sound insulation performance. [0003] Usually, the preparation of airgel mainly includes two processes of gel preparation and drying treatment. The preparation of wet gel mainly adopts sol-gel technology, and the drying treatment methods mai...

Claims

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Application Information

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IPC IPC(8): C01B32/05
Inventor 王双印霍甲冯适
Owner HUNAN UNIV
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