Method for preparing graphite-phase carbon nitride nanosheets by using solution phase

A graphitic carbon nitride and nanosheet technology, applied in nanotechnology, nanotechnology, nitrogen and non-metallic compounds, etc., can solve the problems of large thickness, poor dispersibility, and low nanosheet efficiency, and achieve high preparation efficiency and dispersion. Good performance and large specific surface area

Active Publication Date: 2015-09-09
XIAMEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to provide a kind of solution that can solve present preparation g-C 3 N 4 Solution-phase preparation of graphitic carbon nitride (g-C 3 N 4 ) nanosheet method

Method used

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  • Method for preparing graphite-phase carbon nitride nanosheets by using solution phase
  • Method for preparing graphite-phase carbon nitride nanosheets by using solution phase
  • Method for preparing graphite-phase carbon nitride nanosheets by using solution phase

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Embodiment 1

[0028] A solution-phase preparation of graphitic carbon nitride (g-C 3 N 4 ) a method for nanosheets, comprising the following steps:

[0029] Add 10g of dicyandiamide to a 50mL ceramic crucible with a lid, place the crucible in a muffle furnace, raise it from room temperature to 550°C at a rate of 2.5°C / min, and keep the temperature constant for two hours. After calcination, cool to room temperature, grind the sample in an agate mortar to obtain a yellow powder, namely g-C 3 N 4 polymer material. Under the condition of nitrogen protection, weigh 108mg g-C 3 N 4 The polymer material was added to 120mL of freshly dried THF solution, ultrasonicated for 5min, then 0.55g of metal lithium and 5.08g of naphthalene were added to the dispersion, the solution turned dark green and stirred continuously for one hour, and then an autoinjector was used to inject 10mL / Add 1-bromododecane to the above solution at a speed of h until the green color of the solution disappears, and conti...

Embodiment 2

[0032] Add 8.43g of dicyandiamide to a 50mL ceramic crucible with a lid, place the crucible in a muffle furnace, raise it from room temperature to 550°C at a rate of 2.5°C / min, and keep the temperature constant for two hours. After calcination, cool to room temperature, grind the sample in an agate mortar to obtain a yellow powder, namely g-C 3 N 4 polymer material. Under the condition of nitrogen protection, weigh 71.2mg g-C 3 N 4 Add the polymer material to 100mL of freshly dried tetrahydrofuran solution, ultrasonicate for 5min, then add 0.81g of lithium metal and 5.22g of naphthalene to the dispersion, the solution turns dark green and then continue to stir for one hour, then use an automatic injector to inject 10mL / Add 1-bromo-n-butane to the above solution at a speed of h until the green color of the solution disappears, and continue to react for 12 hours under the protection of nitrogen. After the reaction, add ethanol to the above reactant to remove unreacted lithi...

Embodiment 3

[0034] Add 10g of dicyandiamide to a 50mL ceramic crucible with a lid, place the crucible in a muffle furnace, raise it from room temperature to 550°C at a rate of 2.5°C / min, and keep the temperature constant for two hours. After calcination, cool to room temperature, grind the sample in an agate mortar to obtain a yellow powder, namely g-C 3 N 4 polymer material. Under the condition of nitrogen protection, weigh 368mg g-C 3 N 4 The polymer material was added to 120mL of freshly dried THF solution, ultrasonicated for 5min, then 0.21g of metal lithium and 2.56g of naphthalene were added to the dispersion, the solution turned dark green and stirred continuously for one hour, and then an autoinjector was used to inject 10mL / Add 1-bromo-n-hexane to the above solution at a speed of h until the green color of the solution disappears, and continue to react for 12 hours under the protection of nitrogen. After the reaction, add ethanol to the above reactant to remove unreacted lit...

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Abstract

The invention provides a method for preparing graphite-phase carbon nitride nanosheets by using a solution phase and belongs to the technical field of preparation of nano materials. The method comprises the following steps: calcining dicyanodiamine into a ceramic crucible with a cover, thereby obtaining a g-C3N4 polymer material; adding the g-C3N4 polymer material into a tetrahydrofuran solution of an alkali metal lithium or sodium, performing ultrasonic dispersion, adding halogenated organic solvent, and sequentially washing a solid product obtained by reaction with toluene, ethanol and water, thereby obtaining the g-C3N4 nanosheets. The preparation method has the advantages of cheap raw materials, simple process, high preparation efficiency and the like; the obtained g-C3N4 nanosheets are greatly enlarged in specific surface area, have good dispersibility in an organic phase and a water phase, and have favorable photocatalytic performance.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and relates to a solution phase preparation of graphite phase carbon nitride (g-C 3 N 4 ) method of nanosheets. Background technique [0002] Among the five allotropes of carbon nitride, the graphitic phase carbon nitride, namely g-C 3 N 4 is the most stable one. In recent years, g-C 3 N 4 Because of its good chemical stability, unique semiconductor energy band structure, non-toxic and easy-to-obtain raw materials, and no metals, it has been favored by people in the fields of photocatalytic pollutant degradation, photocatalytic water splitting to produce hydrogen, and photocatalytic organic synthesis. extensive attention. However, as a polymer semiconductor material, g-C 3 N 4 As a photocatalyst, there are still some problems, such as small specific surface area (~10m 2 / g), high exciton binding energy of photogenerated carriers, serious photogenerated electron-hole rec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B21/082B82Y30/00
Inventor 邓顺柳宋雪欢冯蓝谢素原
Owner XIAMEN UNIV
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