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Graphite-phase carbon and nitrogen compound powder, as well as preparation method and application thereof

A carbon-nitrogen compound, graphite phase technology, applied in the field of environment and clean energy, can solve the problems of low output, difficult to obtain, unfriendly to the environment, etc.

Inactive Publication Date: 2011-10-19
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these methods can obtain carbon and nitrogen compounds, there are disadvantages such as large investment in equipment, expensive and difficult to obtain raw materials, high pressure and unfriendly solvents for the reaction, and low yield, and cannot meet the requirements of large-scale and low-cost preparation.

Method used

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  • Graphite-phase carbon and nitrogen compound powder, as well as preparation method and application thereof
  • Graphite-phase carbon and nitrogen compound powder, as well as preparation method and application thereof
  • Graphite-phase carbon and nitrogen compound powder, as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The steps included in the preparation method of the carbonitride powder are as follows:

[0035] Drying: Put 5g of urea into the crucible and dry at a certain temperature;

[0036] Heat treatment: Put the dried samples into the heating furnace. At a heating rate of 3°C / min to 550°C, react at this temperature for 3h to obtain a yellow solid;

[0037] Washing: Put the obtained yellow solid into dilute nitric acid and wash it for 24h under stirring condition. Stop stirring, and remove the supernatant after the powder is completely precipitated. Finally, add deionized water, under stirring conditions, repeat washing 2-3 times and then let it settle;

[0038] Filtration and drying: Obtain the settled lower layer powder by filtration, and dry it under reduced pressure at room temperature or at 80°C to obtain the target product in powder form with an average particle size of 500nm. Elemental analysis showed that the ratio of C and N was C:N=0.73.

Embodiment 2

[0040] The steps included in the preparation method of the carbonitride powder are as follows:

[0041] Drying: Put 10g of melamine into the crucible and dry at a certain temperature;

[0042] Heat treatment: Put the dried samples into the heating furnace. At a heating rate of 7°C / min to 550°C, react at this temperature for 3h to obtain a yellow solid;

[0043] Washing: Put the obtained yellow solid into dilute nitric acid and wash it for 24h under stirring condition. Stop stirring, and remove the supernatant after the powder is completely precipitated. Finally, add deionized water, under stirring conditions, repeat washing 2-3 times and then let it settle;

[0044] Filtration and drying: the settled lower layer powder was obtained by filtration, and dried under reduced pressure at room temperature or at 80°C to obtain the target product in powder form with an average particle size of 0.6 μm. Elemental analysis showed that the ratio of C and N was C:N=0.8.

Embodiment 3

[0046] Get the obtained carbonitride powder of embodiment 1 or embodiment 2 and carry it on the glass surface, and its steps are as follows:

[0047] Take 10mg of powder material and ultrasonically disperse it into 100mL ethanol and Nafion solution (0.5mL, 5wt%);

[0048] Take 20mL and apply it to the glass surface of 3cm×6cm by drop casting method;

[0049] Bake and dry under infrared light to form a film.

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Abstract

The invention relates to graphite-phase carbon and nitrogen compound powder, as well as a preparation method and an application thereof. The powder uses an aromatic multimember heterocyclic ring composed of carbon and nitrogen elements as a repeat unit, and has a layered graphite phase structure. The preparation method of the powder comprises the following steps of: slowly heating an organic small-molecule compound containing carbon and nitrogen elements and other precursors to 450-600 DEG C, reacting at the temperature to form a yellow solid, washing the solid with an acidic solution and drying to obtain a target product. According to the invention, the product is acquired by carrying out a solid phase reaction under normal pressure and using inexpensive and easily available raw materials containing carbon and nitrogen elements as a single molecular precursor, the process is simple, the reaction atmosphere does not need to be adjusted and controlled, the equipment investment is low, the large-scale production can be realized, and the obtained product has multiple optional practical forms and can be widely applied in the industries of air purification, such as sewage treatment, self-cleaning coating, environmental purification including hydrogen preparation through utilizing water photolysis and CO2 photocatalytic reduction and the like, solar energy conversion and utilization, etc.

Description

technical field [0001] The invention particularly relates to a graphite-phase carbonitride powder material, a large-scale preparation method and application thereof, and belongs to the technical field of environment and clean energy. Background technique [0002] Environmental pollution and energy shortages have attracted more and more attention. As a green, environmentally friendly, and low-energy technology, photocatalytic technology has important application value in the treatment of persistent organic pollutants that are difficult to self-degrade in environmental water or air, and the preparation of clean solar fuels that are easy to carry and store. [0003] Solar energy is a renewable and intermittent resource. Converting solar energy into high-energy chemical bonds through photocatalytic technology for environmental purification and clean fuel is an important way to efficiently utilize this resource. Among them, the development of semiconductor photocatalytic materi...

Claims

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Application Information

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IPC IPC(8): B01J31/02C03C17/22C02F1/58C02F1/28A61L9/18C09D7/12
CPCY02W10/37
Inventor 陈韦刘景海张铁锴汪志超
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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