Universal method for preparing porous carbon material based on organic zinc salt

A porous carbon material, organic zinc technology, applied in carbon preparation/purification, etc., can solve problems such as equipment corrosion, achieve high capacitance value, easy to scale up production, and enrich the effect of ultra-microporous structure

Inactive Publication Date: 2019-05-17
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the strong corrosion of KOH to the equipment at high temperature, and further pickling is required to remove the K generated during the activation process, K 2 CO 3 Based on the broad application prospects of porous carbon materials, it is necessary to develop more new, simpler methods suitable for large-scale preparation of porous carbon materials

Method used

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  • Universal method for preparing porous carbon material based on organic zinc salt
  • Universal method for preparing porous carbon material based on organic zinc salt
  • Universal method for preparing porous carbon material based on organic zinc salt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Prepare porous carbon materials according to the following steps:

[0022] Step one: with zinc citrate (C 12 h 10 o 14 Zn 3 ) as carbon precursors.

[0023] Step 2: Weigh 1.00 grams of zinc citrate and place it evenly in 1*3cm 2 The bottom of the quartz boat ensures that the sample is heated evenly and can complete the carbonization and Zn volatilization process in a short period of time, and the temperature is slowly programmed from room temperature to 1000 °C;

[0024] Step 3: Control the temperature of the zinc salt material at 1000°C while maintaining the nitrogen flow, and the activation time is 2 hours.

[0025] Step 4: Cool to room temperature under nitrogen flow to obtain porous carbon material directly.

[0026] The temperature programming rate described in step 2 is 5°C / min. The nitrogen flow rate described in step 3 is 50 ml per minute.

[0027] The present invention has no strict restrictions on the heating equipment of the carbonization process, suc...

Embodiment 2

[0030] Step 1: Zinc gluconate is used as carbon precursor.

[0031]Step 2: Weigh 1.00 grams of zinc gluconate and place it evenly in 1*3cm 2 The bottom of the quartz boat ensures that the sample is heated evenly and can complete the carbonization and Zn volatilization process in a short period of time, and the temperature is slowly programmed from room temperature to 1000 °C;

[0032] Step 3: Under the nitrogen flow, the temperature of the zinc salt material is controlled at 1000° C., and the activation time is 3 hours.

[0033] Step 4: Cool to room temperature under nitrogen flow to obtain porous carbon material directly.

[0034] The temperature programming rate described in step 2 is 2°C / min. The nitrogen flow rate described in step 3 is 100 ml per minute.

Embodiment 3

[0036] Step 1: Zinc glycinate is used as carbon precursor.

[0037] Step 2: Weigh 1.00 grams of zinc glycinate and place it evenly in 1*3cm 2 The bottom of the quartz boat ensures that the sample is heated evenly and can complete the carbonization and Zn volatilization process in a short period of time, and the temperature is slowly programmed from room temperature to 1000 °C;

[0038] Step 3: Control the temperature of the zinc salt material at 1000°C while maintaining the nitrogen flow, and the activation time is 2 hours.

[0039] Step 4: Cool to room temperature under nitrogen flow to obtain porous carbon material directly.

[0040] The temperature programming rate described in step 2 is 10°C / min. The nitrogen flow rate described in step 3 is 80 ml per minute.

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Abstract

The invention belongs to the technical field of preparation of materials, and relates to a universal method for preparing a porous carbon material based on organic zinc salt. The method utilizes the commercial organic zinc salt as a precursor, and the porous carbon material can be obtained by means of one-step calcination. The obtained sample has high specific surface area, porosity, electrical conductivity, chemical stability and physical stability. As an absorbent material, the porous carbon material has very good CO2 absorption and separation properties; as a supercapacitor electrode material, the porous carbon material has a very high capacitance. In addition, the preparation method of the porous carbon material is simple, and the required precursor is the commercially available, cheapand easily-obtained zinc-containing organic salt; the method is low in price of the raw materials, wide in raw material source, simple in preparation and good in process repeatability, can realize macro preparation, and facilitates scale-up production.

Description

technical field [0001] The invention belongs to the field of new materials, and relates to a general, large-scale and cheap method for preparing porous carbon materials based on organic zinc salts, that is, to prepare porous carbon materials by using organic zinc salts as raw materials. Background technique [0002] Porous carbon materials have the characteristics of rich pore structure, high specific surface area, high electrical conductivity, and excellent physical and chemical stability. They are widely used in daily life and industrial production, such as: harmful gas absorption, pollutant adsorption , gas storage and separation, supercapacitor electrode materials, etc. At the same time, research in recent years has found that porous carbon materials also show excellent catalytic activity, especially porous carbon materials containing heteroatoms, which also show high catalytic activity in oxygen reduction reaction and oxygen evolution reaction. Therefore, it is very im...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05
Inventor 李艳强黄会勇
Owner DALIAN UNIV OF TECH
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