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Two-dimensional carbon nanosheet and method for preparing two-dimensional carbon nanosheet on a large scale

A large-scale preparation technology of carbon nanosheets, which is applied in nanocarbon, nanotechnology, nanotechnology, etc., can solve the problems of lengthening the preparation cycle and achieve the effect of simplifying the formation time, shortening the formation time, and high-quality large-scale preparation

Active Publication Date: 2020-03-27
SHANDONG UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the carbon sources used in the existing two-dimensional carbon nanosheet technology need to undergo esterification reaction first to form long chains, and then complex with metal ions in nitrate to form a metal polymer framework. The progress of this reaction mechanism will inevitably lead to The lengthening of the preparation cycle is very passive for the current production enterprises with such great competitiveness, and urgently needs to be resolved as soon as possible

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  • Two-dimensional carbon nanosheet and method for preparing two-dimensional carbon nanosheet on a large scale
  • Two-dimensional carbon nanosheet and method for preparing two-dimensional carbon nanosheet on a large scale
  • Two-dimensional carbon nanosheet and method for preparing two-dimensional carbon nanosheet on a large scale

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Embodiment 1

[0032] The process of large-scale preparation of two-dimensional carbon nanosheets in this embodiment is as follows:

[0033] S1. Mix 1 g of nickel nitrate, 2 g of cobalt nitrate, 6 g of glucose and 25 mL of deionized water to obtain a mixed solution, and the mixing time is 7 minutes;

[0034] S2. Put the mixed solution in an oil bath, and heat it in an oil bath at 100° C. for 1.7 hours to obtain a precursor colloid;

[0035] S6. Firing nanopowders by self-propagating method: raise the temperature of a tube furnace filled with protective gas nitrogen to 750°C, then place the quartz tube with precursor colloid in the tube furnace for instant firing or rapid firing The two-dimensional carbon nanosheets are obtained, and the firing process is about 2 minutes.

[0036] pass Figure 1-4 It can be seen that the obtained two-dimensional carbon nanosheets are thin and uniform in thickness, and the carbon nanosheets wrap nickel-cobalt metal particles.

[0037] pass Figure 5 It can...

Embodiment 2

[0044] The process of large-scale preparation of two-dimensional carbon nanosheets in this embodiment is as follows:

[0045] S1. Mix 3g ferric nitrate, 3g sucrose and 15mL deionized water evenly to obtain a mixed solution, and the mixing time is 20min;

[0046] S2. Put the mixed solution in an oil bath, and heat it in an oil bath at 70° C. for 1.9 hours to obtain a precursor colloid;

[0047] S6. Firing nano-powders by self-propagation method: heat up the tube furnace filled with protective gas nitrogen to 500-550°C, then put the quartz tube with precursor colloid in the tube furnace, and burn it instantly or quickly The two-dimensional carbon nanosheets are obtained by firing, wherein the firing process takes about 2 minutes. .

Embodiment 3

[0049] The process of large-scale preparation of two-dimensional carbon nanosheets in this embodiment is as follows:

[0050] S1. Mix 1g of nickel nitrate, 2g of cobalt nitrate, 3g of maltose and 20mL of deionized water to obtain a mixed solution, and the mixing time is 20min;

[0051] S2. Put the mixed solution in an oil bath, and heat it in an oil bath at 160° C. for 1 hour to obtain a precursor colloid;

[0052] S6. Use the self-propagating method to burn nano-powders: heat up the tube furnace filled with protective gas nitrogen to 850-900°C, then put the quartz tube with the precursor colloid in the tube furnace, and burn it instantly or quickly The two-dimensional carbon nanosheets are obtained by firing, wherein the firing process takes about 2 minutes.

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Abstract

The invention relates to a two-dimensional carbon nanosheet and a method for preparing the two-dimensional carbon nanosheet on a large scale. Carbohydrates are creatively used as carbon sources for preparing the two-dimensional carbon nanosheet, the carbon sources do not need to be subjected to esterification reaction, and hydroxyl is directly complexed with transition metal provided by nitrate toform a metal polymer skeleton. The formation time of the aqueous solution is greatly shortened and is only less than 1h, which cannot be realized by the existing preparation process and has importantsignificance. The formation time of precursor colloid is further shortened and less than 2h by using the carbohydrates. Nitrate radicals provided by nitrate in the invention can generate a large amount of gas in an instant or rapid pyrolysis process, so that a strong impact force is provided to counteract the stacking force between the carbon sources, and an ultrathin carbon nanosheet is obtained. Short-time large-scale preparation of high-quality two-dimensional carbon nanosheet is realized and the preparation time is less than 3-4h, which is a qualitative improvement for the preparation technology of the two-dimensional carbon nanosheet.

Description

technical field [0001] The invention relates to two-dimensional carbon nanosheets, in particular to a two-dimensional carbon nanosheet and a method for preparing two-dimensional carbon nanosheets on a large scale. Background technique [0002] Since the advent of graphene, graphene-like two-dimensional materials (such as transition metal sulfides TMDs, transition metal oxides, carbon nanosheets) have been extensively studied in recent years due to their excellent diffusion properties. Among the above two-dimensional materials, two-dimensional carbon nanosheets are widely used in the field of electrochemical energy storage due to their high specific surface area and adjustable pore size distribution, which is of great significance to the growing global energy demand. Therefore, In the face of such a huge market demand, how to shorten the production cycle and improve product quality has become the most critical issue for various two-dimensional carbon nanosheet manufacturers t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/15B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01B32/15
Inventor 王东温广武亓帅
Owner SHANDONG UNIV OF TECH
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