Mesoporous carbon prepared by using manganese compound, and preparation method thereof

A technology of manganese compounds and porous carbon, which is applied in the fields of manganese compounds, chemical instruments and methods, carbon preparation/purification, etc., can solve problems such as difficulty in achieving precise control of pore structure, inability to regenerate soft templates, and restricting the application of soft template methods. , to achieve the effect of high mesoporosity, low cost and reduced preparation cost

Active Publication Date: 2019-01-01
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the soft template method, because the template agent will depolymerize at high temperature, it is difficult to achieve precise control of the pore structure, and the soft template cannot be recycled after the carbonization stage, and the cost is high, which restricts the application of the soft template method

Method used

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  • Mesoporous carbon prepared by using manganese compound, and preparation method thereof
  • Mesoporous carbon prepared by using manganese compound, and preparation method thereof
  • Mesoporous carbon prepared by using manganese compound, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Grind the PVA solid particles to 200 mesh. The obtained PVA powder and manganese carbonate are uniformly mixed mechanically in a ratio of 1:1 (the mass ratio of PVA to MnO). Weigh a certain mass of mixed sample in a quartz tube furnace, 2 Carbonize the sample in the atmosphere. The heating rate is 5℃ / min, the carbonization temperature is 900℃, and the carbonization time is 1h. Subsequently, continue to maintain N 2 Atmosphere, wait for the sample to cool to room temperature. Pour the cooled sample into a 1.8 mol / L sulfuric acid solution and mechanically shake for 30 minutes, then stand still, filter, and pickle the sample again with fresh sulfuric acid solution. Repeat the pickling several times until Mn is in the pickling solution 2+ The concentration cannot be detected. The acid-washed sample is washed with distilled water to neutrality, and finally the sample is dried in a blast drying oven at 105°C to obtain the mesoporous carbon of the present invention.

[0047] ...

Embodiment 2

[0050] Grind the PVA solid particles to 200 mesh. The obtained PVA powder and manganese carbonate are uniformly mixed mechanically in a ratio of 1:3 (the mass ratio of PVA to MnO). Weigh a certain mass of mixed sample in a quartz tube furnace, 2 Carbonize the sample in the atmosphere. The heating rate is 5℃ / min, the carbonization temperature is 900℃, and the carbonization time is 1h. Subsequently, continue to maintain N 2 Atmosphere, wait for the sample to cool to room temperature. Pour the cooled sample into a 1.8 mol / L sulfuric acid solution and mechanically shake for 30 minutes, then stand still, filter, and pickle the sample again with fresh sulfuric acid solution. Repeat the pickling several times until Mn is in the pickling solution 2+ The concentration cannot be detected. The acid-washed sample is washed with distilled water to neutrality, and finally the sample is dried in a blast drying oven at 105°C to obtain the mesoporous carbon of the present invention.

[0051] ...

Embodiment 3

[0054] PVA solid particles were added to hot water at 80° C., and continuously stirred (rotation speed=600 r / min) to obtain a 20 wt.% PVA solution. Add manganese carbonate in a ratio of 1:3 (the mass ratio of PVA to MnO), continue to stir, and fully mix the manganese carbonate and the PVA solution. Pour the mixed solution into a quartz crucible and dry it overnight in a blast drying oven at 105°C. Place the dried sample in a quartz tube furnace at N 2 Carbonize the sample in the atmosphere. The heating rate is 5℃ / min, the carbonization temperature is 900℃, and the carbonization time is 1h. Subsequently, continue to maintain N 2 Atmosphere, wait for the sample to cool to room temperature. Pour the cooled sample into a 1.8 mol / L sulfuric acid solution and mechanically shake for 30 minutes, then stand still, filter, and pickle the sample again with fresh sulfuric acid solution. Repeat the pickling several times until Mn is in the pickling solution 2+ The concentration cannot be...

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Abstract

The invention discloses mesoporous carbon prepared by using a manganese compound, and a preparation method thereof. According to the method, manganese oxide crystal nanoparticles formed by decomposinga manganese compound during pyrolysis carbonization of a carbon precursor have mesoporous size characteristic, the manganese compound can catalyze the carbon precursor to form carbon, and the manganese compound is used as a template agent precursor so as to prepare mesoporous carbon. The method specifically comprises: 1, uniformly mixing a thermoplastic carbon precursor and a manganese compound through solid phase powder or a liquid phase solution; 2, carrying out high-temperature carbonizing on the mixture in an inert atmosphere to obtain a MnO-nanoparticle-coating carbide; and 3, uniformlymixing the carbide and a dilute acid solution, and removing MnO to obtain mesoporous carbon. According to the present invention, the prepared mesoporous carbon has characteristics of high specific surface area, high mesoporosity, large mesopore volume, easily-controlled pore structure and easily-controlled pore size distribution, can greatly reduce the carbonization temperature of the carbon precursor, and can be widely used in the fields of adsorption, catalysis and separation.

Description

Technical field [0001] The invention belongs to a mesoporous carbon and a preparation method thereof, in particular to a mesoporous carbon prepared by using a manganese compound and a preparation method thereof. The obtained mesoporous carbon can be applied to adsorption, catalysis, separation, electrochemistry and the like. Background technique [0002] Porous carbon is a widely used adsorbent. It has the advantages of high specific surface area, large pore volume, and rich surface chemical functional groups. It has high adsorption performance and is flourishing in the field of environmental protection. It can effectively treat water bodies and the atmosphere. Species of pollutants. The International Union of Pure and Applied Chemistry (IUPAC) has divided the internal pores of porous materials according to their pore size, including micropores (<2nm), mesopores (2-50nm) and macropores (>50nm). [0003] Traditional porous carbon is mostly microporous activated carbon. Compar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05C01G45/00C01G45/02B82Y40/00B82Y30/00B01J21/18B01J35/10B01J32/00
CPCB82Y30/00B82Y40/00C01G45/00C01G45/02B01J21/18B01J35/1023B01J35/1028B01J35/1047C01P2002/72C01P2006/14C01P2006/12C01P2006/17
Inventor 江霞蒋文举周琦颖
Owner SICHUAN UNIV
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