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Method for rapidly preparing graphite phase carbon nitride nanorods without template

A graphite-phase carbon nitride and nanorod technology, which is applied in chemical instruments and methods, inorganic chemistry, nanotechnology, etc., can solve the problems of rapid acquisition, popularization and application of graphite-phase carbon nitride nanorods, increased environmental treatment costs, and environmental pollution. Friendly and other issues, to achieve the effect of high practical value, reduced recombination rate, and broad application prospects

Inactive Publication Date: 2019-04-19
ZHANGJIAGANG DONGDA IND TECH RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The thermal polycondensation method can prepare carbon nitride nanorods in large quantities. This method usually requires the precipitation of nitrogen-containing organic compounds in saturated organic solvents to form precursors. However, the solubility of nitrogen-containing organic compounds in organic solvents is very small, so the preparation of precursors The process requires a large amount of organic solvents, which increases the cost of environmental treatment
[0005] The above-mentioned method has the disadvantages of long cycle, complicated process, high cost, and unfriendly environment, which is not conducive to the rapid acquisition and further popularization and application of graphitic carbon nitride nanorods. Therefore, the development of a fast, efficient, environmentally friendly, A low-cost new method for preparing high-performance graphitic carbon nitride nanorods is of great significance for the practical application of carbon nitride

Method used

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  • Method for rapidly preparing graphite phase carbon nitride nanorods without template
  • Method for rapidly preparing graphite phase carbon nitride nanorods without template
  • Method for rapidly preparing graphite phase carbon nitride nanorods without template

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Put 10g of melamine into the lining of a 100mL hydrothermal kettle, add 70mL of 0.5mol / L acetic acid solution, and after ultrasonic dispersion for 30min, heat it in water at 180°C for 12h; mix the prepared self-assembled melamine with 0.2g of carbon fiber, put Put the crucible into a quartz crucible; then place the crucible in the resonant cavity of an industrial high-energy microwave oven and evacuate it to 7kPa, set the microwave power to 4kW, and start to keep warm after the temperature reaches 580°C, turn off the microwave oven after 10min, and let the reaction system cool down with the furnace The samples were taken out after reaching room temperature. It can be seen that there is a large amount of light yellow powder in the crucible, that is, graphite phase carbon nitride nanorods.

[0036] figure 1 The SEM image of the obtained carbon nitride nanorods shows that the length of the nanorods is about 5 μm, the diameter is about 300 nm, and the aspect ratio is about...

Embodiment 2

[0041] Put 10g of melamine into the lining of a 100mL hydrothermal kettle, add 70mL of 1.0mol / L acetic acid solution, mix ultrasonically for 30min, and heat it in water at 150°C for 12h; mix the prepared self-assembled melamine with 0.5g of carbon fiber, put it in In a quartz crucible; then place the crucible in the resonant cavity of an industrial high-energy microwave oven and evacuate it to 7kPa, set the microwave power to 4kW, keep warm after the temperature reaches 580°C, turn off the microwave oven after 10min, and let the reaction system cool down to room temperature with the furnace Then remove the sample. It can be seen that there are a large amount of light yellow powder in the crucible, that is, graphite phase carbon nitride nanorods, with an aspect ratio of 18 and a specific surface area of ​​154.8m 2 / g.

Embodiment 3

[0043] Put 10g of melamine into the lining of a 100mL hydrothermal kettle, add 70mL of 2.0mol / L acetic acid solution, mix ultrasonically for 30min, and heat it in water at 120°C for 12h; mix the prepared self-assembled melamine with 0.1g of carbon fiber, put in In a quartz crucible; then place the crucible in the resonant cavity of an industrial high-energy microwave oven and evacuate it to 7kPa, set the microwave power to 4kW, keep warm after the temperature reaches 580°C, turn off the microwave oven after 10min, and let the reaction system cool down to room temperature with the furnace Then remove the sample. It can be seen that there is a large amount of light yellow powder in the crucible, that is, graphite phase carbon nitride nanorods, with an aspect ratio of 20 and a specific surface area of ​​176.3m 2 / g.

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Abstract

The invention discloses a method for rapidly preparing graphite phase carbon nitride nanorods without a template. The method is characterized by comprising the following steps of firstly preparing melamine micro-nano rods by a self-assembly method using melamine powder as a precursor; then uniformly mixing the prepared micro-nano rods and a microwave absorber, and placing in a ceramic crucible; finally, placing the crucible in the center of a high-energy microwave oven resonant cavity, vacuuming, conducting high-energy microwave irradiation heating, and rapidly obtaining the graphite phase carbon nitride nanorods. The method can efficiently and rapidly prepare the graphite phase carbon nitride nanorods with a high specific surface area, a high purity and a high yield without the template,and the nanorods have a length to diameter ratio of 10-20, and can be applied to fields of photohydrolysis of water to produce hydrogen and photohydrolysis of organic pollutants, biochemical sensors and the like.

Description

technical field [0001] The patent of the present invention relates to the technical field of preparation of graphite-phase carbon nitride, and specifically relates to a preparation method for rapidly and efficiently synthesizing graphite-phase carbon nitride nanorods based on self-assembly technology and high-energy microwave irradiation heating technology. Background technique [0002] Due to people's lack of anticipation and prevention of the negative impact brought by the rapid development of industry, the global energy crisis and environmental pollution problems have been caused. Semiconductor photocatalytic materials can directly use solar energy to decompose water into hydrogen and oxygen, or decompose harmful organic pollutants into carbon dioxide and water, and have great application prospects in solving energy crisis and environmental pollution. As a synthetic organic semiconductor, graphitic carbon nitride has a unique electronic structure and excellent chemical st...

Claims

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Application Information

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IPC IPC(8): C01B21/082B82Y40/00
CPCB82Y40/00C01B21/0605C01P2002/72C01P2004/03C01P2004/16C01P2006/12C01P2006/60
Inventor 王继刚徐奇楠乔坤吴珊
Owner ZHANGJIAGANG DONGDA IND TECH RES INST
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