Universal preparation method and application of hierarchical-pore nitrogen-doped carbon catalyst synthesized on basis of double pore-foaming agents

A nitrogen-doped carbon, hierarchical pore technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of multi-price defect sites, uneven distribution, and poor order of carbon materials. and other problems, to achieve the effect of environmental friendliness, increase specific surface area, and increase pore volume

Pending Publication Date: 2020-02-11
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among many soft templating agents, EDTA disodium cobalt salt has been widely used because of its adjustable pore size, many defect sites and low price. However, the order of its synthesized carbon materials is relatively low. poor, uneven distribution

Method used

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  • Universal preparation method and application of hierarchical-pore nitrogen-doped carbon catalyst synthesized on basis of double pore-foaming agents
  • Universal preparation method and application of hierarchical-pore nitrogen-doped carbon catalyst synthesized on basis of double pore-foaming agents
  • Universal preparation method and application of hierarchical-pore nitrogen-doped carbon catalyst synthesized on basis of double pore-foaming agents

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Fully mix 1g of biomass chitosan with water and dry to obtain material A1;

[0029] (2) Transfer material A1 to a nickel boat and place it in a tube furnace. Under the protection of nitrogen gas with a flow rate of 100mL / min, the temperature is raised from room temperature to 300°C for 60 minutes, and then heated at a rate of 10°C / min. Raise the temperature to 800°C for 120 minutes, then cool down to room temperature naturally to obtain material B1;

[0030] (3) Transfer material B1 to a 100mL beaker, add acidic solution to soak for 12 hours, then wash with high-purity water until the filtrate is neutral, and then dry in a blast drying oven at 40°C for 12 hours to obtain carbon catalyst C1;

[0031] (4) The prepared carbon catalyst C1 was used as the cathode material of the electro-Fenton system to degrade 50mL malachite green solution with a concentration of 15mg / L, and the complete degradation time was 120min.

Embodiment 2

[0033] (1) Mix 1g of biomass chitosan and 2.5g of EDTA-2Na-Co with water, stir with a magnetic stirrer for 2 hours, mix well and dry to obtain material A2;

[0034] (2) Transfer the material A2 to a porcelain boat and place it in a tube furnace. Under the protection of nitrogen gas with a flow rate of 100mL / min, raise the temperature from room temperature to 300°C for 60 minutes, and then increase the temperature at a rate of 10°C / min. Raise the temperature to 800°C for 120 minutes, then cool down to room temperature naturally to obtain material B2;

[0035] (3) Transfer material B2 to a 100mL beaker, add acidic solution to soak for 12 hours, then wash with high-purity water until the filtrate is neutral, and then dry at 40°C for 12 hours in a blast drying oven to obtain carbon catalyst C2;

[0036] (4) The prepared carbon catalyst C2 was used as the cathode material of the electro-Fenton system to degrade 50mL malachite green solution with a concentration of 15mg / L, and the c...

Embodiment 3

[0038] (1) Mix 1g of biomass chitosan and 2.5g of molecular sieve SBA-15 with water, stir with a magnetic stirrer for 2 hours, mix well and dry to obtain material A3;

[0039] (2) Transfer material A3 to a nickel boat and place it in a tube furnace. Under the protection of nitrogen gas with a flow rate of 100mL / min, the temperature is raised from room temperature to 300°C for 60 minutes, and then heated at a rate of 10°C / min. Raise the temperature to 800°C for 120 minutes, then cool down to room temperature naturally to obtain material B3;

[0040] (3) Transfer material B3 to a 100mL beaker, add acidic solution to soak for 12 hours, then wash with high-purity water until the filtrate is neutral, and then dry at 40°C for 12 hours in a blast drying oven to obtain carbon catalyst C3;

[0041] (4) The prepared carbon catalyst C3 was used as the cathode material of the electro-Fenton system to degrade 50mL malachite green solution with a concentration of 15mg / L, and the complete de...

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Abstract

The invention discloses a universal preparation method and application of a hierarchical-pore nitrogen-doped carbon catalyst synthesized on the basis of double pore-foaming agents. The preparation method comprises the following steps: mixing biomass chitosan, ethylenediamine tetraacetic acid cobalt disodium salt and a molecular sieve SBA-15 with water, and carrying out drying to obtain a materialA; heating the material A from room temperature to 300 DEG C for 60 min under the protection of inert gas, keeping the material A at 300 DEG C for 60 min, heating the material A to 800 DEG C at a heating rate of 10 DEG C/min, keeping the material A at 800 DEG C r 120 min, and carrying out natural cooling to room temperature to obtain a material B; and adding the material B into an acidic solution,soaking the material B for 12 h, washing the material B with high-purity water until a filtrate is neutral, and carrying out drying at 40-60 DEG C for 12 h to obtain the target product, i.e., hierarchical-pore nitrogen-doped carbon catalyst. The hierarchical-pore nitrogen-doped carbon catalyst has a specific surface area of 661-925 m<2>/g, contains a large number of micropores and mesopores, canefficiently degrade organic pollutants when applied as a positive electrode material to an electro-Fenton system, and is free of secondary pollution and friendly to environment in use.

Description

technical field [0001] The invention belongs to the technical field of synthesis of porous carbon materials, and in particular relates to a universal preparation method and application of a hierarchically porous nitrogen-doped carbon catalyst synthesized based on dual porogens. Background technique [0002] Energy crisis and environmental pollution are two major global issues that hinder the development of all aspects of society. With the development of science and technology, the amount of artificially synthesized refractory organic substances is increasing. At the same time, in the process of industrial production, organic pollutants with high biological toxicity and extremely difficult to be degraded by microorganisms will also be discharged into rivers and soil, which seriously endangers the living environment of people, animals and plants. Therefore, the treatment of refractory organic pollutants has attracted more and more attention. [0003] The electro-Fenton metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/10C02F1/461C02F1/72
CPCB01J27/24B01J35/0033B01J35/1023B01J35/1061B01J35/1057B01J37/0018C02F1/4672C02F1/46109C02F1/722C02F1/725C02F2001/46133C02F2101/30C02F2305/026
Inventor 高书燕王新宇田苗陈野
Owner HENAN NORMAL UNIV
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