Corn bran-based three-dimensional multi-level pore structure carbon material and preparation method thereof

A technology of multi-level pores and carbon materials, applied in chemical instruments and methods, and other chemical processes, can solve problems such as difficult industrialization, high cost, and time-consuming

Inactive Publication Date: 2015-09-09
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The invention adopts low-cost, abundant-yield, and renewable biomass corn husks as a carbon source, and effectively prepares a new type of carbon material with a three-dimensional multi-level pore structure thr

Method used

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  • Corn bran-based three-dimensional multi-level pore structure carbon material and preparation method thereof
  • Corn bran-based three-dimensional multi-level pore structure carbon material and preparation method thereof
  • Corn bran-based three-dimensional multi-level pore structure carbon material and preparation method thereof

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specific Embodiment approach 1

[0016] Specific implementation mode one: the preparation method of corn bran-based three-dimensional hierarchical porous structure carbon material in this implementation mode is carried out according to the following steps:

[0017] Step 1: Cut corn husks into small pieces, wash with water and dry at 100°C;

[0018] Step 2, adding 5 g of corn husks treated in step 1 into 100 mL of KOH solution with a mass concentration of 5%, then reflux for 4 h in a water bath at 80° C. (obtaining a brown colloidal liquid), filter through a 200-mesh stainless steel sieve after cooling, and leave lower solid;

[0019] Step 3. Dry the solid obtained in step 2 at 100°C and place it in a quartz tube furnace, and then roast it in a high-purity nitrogen (volume fraction: 99.999% pure) atmosphere at a temperature of 800°C for 2 hours (gray solid);

[0020] Step 4: Wash with a hydrochloric acid solution with a concentration of 2 mol / L (to remove potassium salts), centrifuge, wash with water three t...

specific Embodiment approach 2

[0022] Specific implementation mode two: the preparation method of corn bran-based three-dimensional hierarchical porous structure carbon material in this implementation mode is carried out according to the following steps:

[0023] Step 1: Cut corn husks into small pieces, wash with water and dry at 100°C;

[0024] Step 2, adding 5 g of corn husks treated in step 1 into 100 mL of KOH solution with a mass concentration of 7%, then refluxed in a water bath at 80° C. for 4 h (obtaining a brown colloidal liquid), filtered through a 200-mesh stainless steel sieve after cooling, and retained lower solid;

[0025] Step 3. Dry the solid obtained in step 2 at 100° C. and place it in a quartz tube furnace, and roast it for 2 hours at a temperature of 800° C. solid);

[0026] Step 4: Wash with a hydrochloric acid solution with a concentration of 2 mol / L (to remove potassium salts), centrifuge, wash with water three times, and then dry at 120° C. for 12 hours to obtain a corn bran-base...

specific Embodiment approach 3

[0028] Specific implementation mode three: the preparation method of corn bran-based three-dimensional hierarchical porous structure carbon material in this implementation mode is carried out according to the following steps:

[0029] Step 1: Cut corn husks into small pieces, wash with water and dry at 100°C;

[0030] Step 2, adding 5 g of corn husks treated in step 1 into 100 mL of KOH solution with a mass concentration of 9%, then refluxed in a water bath at 80° C. for 4 h (obtaining a brown colloidal liquid), filtered through a 200-mesh stainless steel sieve after cooling, and retained lower solid;

[0031] Step 3. Dry the solid obtained in step 2 at 100° C. and place it in a quartz tube furnace, and roast it for 2 hours at a temperature of 800° C. solid);

[0032] Step 4: Wash with a hydrochloric acid solution with a concentration of 2 mol / L (to remove potassium salts), centrifuge, wash with water three times, and then dry at 120° C. for 12 hours; the cornhusk-based thre...

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Abstract

The invention relates to a corn bran-based three-dimensional multi-level pore structure carbon material and a preparation method thereof, which belong to three-dimensional multi-level pore structure carbon materials. According to the corn bran-based three-dimensional multi-level pore structure carbon material and the preparation method, renewable biomass corn bran with low price and rich yield is adopted as a carbon source, the novel three-dimensional multi-level pore structure carbon material is effectively prepared by adopting a simple template-free method which is easy to industrialize, and the problems of process complexity, time consumption, high cost and difficulty in realizing industrialization of a template method are solved. The corn bran-based three-dimensional multi-level pore structure carbon material is prepared in the following steps of cutting the corn bran into pieces, drying after water washing treatment, then adding to a KOH solution, returning under a water bath condition, sieving after cooling, then roasting solids in high-purity nitrogen atmosphere, then cleaning with a hydrochloric acid solution, centrifuging, washing with water and drying. The specific surface area of the carbon material reaches up to 927m<2>g-1, macropore, mesopore and micropore structures are mutually communicated, the pore size distribution is centered, an oxygen enrichment functional group is contained, and the content is 12% to 17%.

Description

technical field [0001] The invention belongs to a three-dimensional multi-level porous structure carbon material; in particular, it relates to a corn bran-based three-dimensional multi-level porous structure carbon material and a preparation method thereof. Background technique [0002] Three-dimensional hierarchically porous carbons (3D-HPCs), as a novel class of electrode carbon materials and adsorption materials, have attracted extensive attention and attention from researchers. 3D-HPCs have a unique pore structure and topology, and exhibit many advantages in the above-mentioned application fields, including: (1) interconnected macropores, mesopores, and micropores; (2) high specific surface; (3) Continuous electron transfer path; (4) Narrow pore size distribution. Among them, the interconnected hierarchical pore structure is beneficial to the rapid transport of ions, and the high specific surface area can provide a broad active interface, which has superior electrochemi...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30C01B31/12
Inventor 马方伟万家峰武光宋世娇
Owner HEILONGJIANG UNIV
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