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Preparation method of porous nitrogen-rich carbon material

A technology of porous composite materials and carbon materials, which is applied in the field of preparation of porous nitrogen-rich carbon materials, can solve the problems of large randomness of nitrogen content and no literature reports, and achieves the improvement of utilization rate, contribution and yield. Effect

Active Publication Date: 2021-04-09
ZHENGZHOU TOBACCO RES INST OF CNTC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] At present, the nitrogen content of carbon materials prepared from plant materials is relatively random. In various preparation methods of carbon materials, there is no literature on the controllable utilization of endogenous nitrogen in plant precursors, especially volatile endogenous nitrogen. report or patent application

Method used

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  • Preparation method of porous nitrogen-rich carbon material
  • Preparation method of porous nitrogen-rich carbon material
  • Preparation method of porous nitrogen-rich carbon material

Examples

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Embodiment 1

[0035] see figure 1 , this embodiment provides a method for preparing a porous nitrogen-rich carbon material, including:

[0036] Pretreatment Wash the tobacco leaves and place them in an oven at 50°C to dry to a moisture content of 5%, crush them to 20-40 meshes to obtain tobacco leaf granular materials, the tobacco leaf granular materials are irregular spherical; provide an activation solution, and the activation solution is prepared by Mass fraction 5% ZnCl 2 And 0.5mol / L CuBr composition;

[0037] Activation Weigh 10 g of the obtained tobacco leaf granular material, soak it in the activation solution after drying, filter, dry in an oven at 50°C, and adjust the ZnCl concentration several times. 2 and the total loading of CuBr, the tobacco leaf activation material is obtained, and the ZnCl in it 2 The total load of CuBr and CuBr is 5% of the mass of the tobacco leaf particles;

[0038] Impregnation with 5% SiCl by volume 4 ether solution, the SiCl 4 Diethyl ether solut...

Embodiment 2

[0042] This example provides a preparation method of a porous nitrogen-rich carbon material, which is basically the same as the preparation method provided in Example 1, the main difference being that the raw material used in this example is smoked sheet, and the coupling reagent is CuOTf, other steps and process parameters are the same.

Embodiment 3

[0044] This example provides a preparation method of a porous nitrogen-rich carbon material, which is basically the same as the preparation method provided in Example 1, the main difference is that the raw material used in this example is tobacco stalks, and the coupling reagent is FeCl 2 , other steps and process parameters are the same.

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Abstract

The invention provides a preparation method of a porous nitrogen-rich carbon material, which comprises the following steps: carrying out pretreatment, activation, impregnation, carbonization, purification and the like on a nitrogen-rich herbal material to obtain the porous nitrogen-rich carbon material, and the pretreatment further comprises the following steps: providing an activation solution which comprises 1-20 wt% of an activator and 0.1-2 mol / L of a coupling reagent; and the main purpose of the dipping step is to form an inorganic layer on the surface of the herbal activated material. In the carbonization treatment process, nitrogen-containing organic matters in the nitrogen-rich herbal material are grafted into a carbon skeleton under the action of a coupling reagent, and a volatile nitrogen-containing compound is bound by a coating layer in the heating process, so that the carbonization microenvironment is changed; therefore, the preparation method provided by the invention can effectively improve the utilization rate of the endogenous nitrogen element in the preparation process of the herbal-based carbon material, and meanwhile, the yield of the carbon product is increased.

Description

technical field [0001] The invention relates to the recycling of herbaceous plant waste, in particular to a preparation method of a porous nitrogen-rich carbon material. Background technique [0002] Activated carbon is a kind of porous solid carbon material. Because of its developed pore structure and huge specific surface area, it has unique strong adsorption properties, and its chemical properties are stable and insoluble in water and most other solvents. It has been widely used in adsorption, separation, catalysis and other fields. Studies have shown that the binary composite filter rod made of activated carbon and cellulose acetate in a certain proportion has a significant effect in selectively reducing cigarette tar, benzopyrene, carbonyl compounds, etc. very important. [0003] The preparation of herbal-based porous carbon is mainly based on the thermal conversion process of raw materials. According to whether there is an external activator involved, it can be divid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/318C01B32/324C01B32/342C01B32/348C01B32/378
CPCC01B32/318C01B32/324C01B32/342C01B32/348C01B32/378
Inventor 王金棒贾楠艾继涛邱纪青刘亚丽汪志波郑路张仕华洪群业
Owner ZHENGZHOU TOBACCO RES INST OF CNTC
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