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Preparation method of ultrathin graphite phase carbon nitride

A graphitic carbon nitride, ultra-thin technology, applied in the field of materials, can solve the problems of large thickness of graphitic carbon nitride sheets, restricting large-scale mass production, and high difficulty in preparation process operation, so as to avoid structural defects and environmental pollution. problems, no heavy metal pollution, cheap raw materials

Active Publication Date: 2017-03-08
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a preparation method of ultra-thin graphite phase carbon nitride to solve the problem of large thickness of graphite phase carbon nitride sheets, presence of impurities, high difficulty in the preparation process, and restrictions on large-scale batch production in the prior art. technical problem

Method used

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  • Preparation method of ultrathin graphite phase carbon nitride
  • Preparation method of ultrathin graphite phase carbon nitride
  • Preparation method of ultrathin graphite phase carbon nitride

Examples

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Effect test

Embodiment 1

[0035] 1) Put melamine in a crucible, put it into an ash furnace, raise the temperature from room temperature to a calcination temperature of 520°C at a rate of 5°C / min, then calcinate at the calcination temperature for 4h, and then cool naturally to room temperature to obtain Lumpy g-C 3 N 4 ;

[0036] 2) Take 500mg of block g-C prepared in step 1) 3 N 4 , placed in a glass vessel with a volume of 250mL, add 200mL of deionized water, insert the probe of the ultrasonic cell breaker into the block g-C 3 N 4 In the deionized water mixture, the probe is 1cm deep into the liquid surface, the probe diameter is 10mm, the ultrasonic power is 900W, and the ultrasonic crushing is 90min;

[0037] 3) The obtained product was centrifuged at a speed of 8000r / min for 15min, and then the solid obtained after centrifugation was dried in a vacuum oven at 60°C for 12h;

[0038] 4) Transfer the dried solid into a crucible, then put it into an ash furnace, raise the temperature from room te...

Embodiment 2

[0040] 1) Put melamine in a crucible, then put it into an ash furnace, raise the temperature from room temperature to a calcination temperature of 520°C at a rate of 10°C / min, then calcinate at the calcination temperature for 4h, and then cool naturally to room temperature to obtain Lumpy g-C 3 N 4 ;

[0041] 2) Take 500mg of block g-C prepared in step 1) 3 N 4 , placed in a glass vessel with a volume of 250mL, add 150mL of deionized water, insert the probe of the ultrasonic cell breaker into the block g-C 3 N 4 In the deionized water mixture, the probe penetrates 1cm into the liquid surface, the diameter of the probe is 10mm, the ultrasonic power is 600W, and the ultrasonic crushing is 120min;

[0042] 3) The obtained product was centrifuged at a speed of 12000r / min for 5min, and then the solid obtained after centrifugation was dried in a vacuum oven at 80°C for 10h;

[0043] 4) Transfer the dried solid into a crucible, put it into an ash furnace, raise the temperature ...

Embodiment 3

[0045] 1) Put melamine in a crucible, then put it into an ash furnace, raise the temperature from room temperature to a calcination temperature of 520°C at a rate of 5°C / min, then calcinate at the calcination temperature for 3h, and then cool naturally to room temperature to obtain Lumpy g-C 3 N 4 ;

[0046] 2) Take 500mg of block g-C prepared in step 1) 3 N 4 , placed in a glass vessel with a volume of 250mL, add 200mL of deionized water, insert the probe of the ultrasonic cell breaker into the block g-C 3 N 4 In the deionized water mixture, the probe penetrates 1cm into the liquid surface, the diameter of the probe is 10mm, the ultrasonic power is 1200W, and the ultrasonic crushing is 60min;

[0047] 3) The obtained product was centrifuged at a speed of 10000r / min for 10min, and then the centrifuged solid was dried in a vacuum oven at 60°C for 12h;

[0048] 4) Transfer the dried solid into a crucible, then put it into the ash furnace, raise the temperature from room te...

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Abstract

The invention provides a preparation method of ultrathin graphite phase carbon nitride. The preparation method comprises steps as follows: melamine is calcined firstly, and blocky g-C3N4 is obtained; blocky g-C3N4 is uniformly dispersed in deionized water and subjected to ultrasonication; a product obtained after ultrasonication is subjected to centrifugal separation, and solids are collected and dried; finally, a dried product is calcined again, and a target product is obtained. According to the preparation method of ultrathin graphite phase carbon nitride, mass preparation and thickness regulation of ultrathin g-C3N4 with the thickness of 0.8-1.2 nm equal to the thickness of 3-4 atom layers are realized, no organic solvent or toxic chemical reagent participates in a reaction process, so that the problems of structure defects and environmental pollution which are caused by introduction of impurities can be effectively solved, and on the basis of the non-toxic characteristic of prepared g-C3N4, the preparation method can be widely applied to photocatalysis, electro-catalysis, biosensing, bioimaging and spintronics. The whole preparation process is simple to operate, high in controllability, good in repeatability, green, environment-friendly and suitable for large-scale production.

Description

technical field [0001] The invention belongs to the field of materials, and relates to an ultra-thin (0.8-12nm in thickness) graphite phase carbon nitride (g-C 3 N 4 ) preparation method. Background technique [0002] g-C 3 N 4 As a new type of functional non-metallic material, it has high thermal and chemical stability, good thermal and electrical conductivity, small band gap value and suitable band edge position, controllable specific surface area, rich sources of precursors, and preparation The method is simple, environmentally friendly and free of heavy metal pollution, and its lamellar structure is controllable and other excellent characteristics, making g-C 3 N 4 It has great potential application value in many new technology fields such as photocatalysis, electrocatalysis, biosensing, bioimaging and spintronics. [0003] Traditional g-C 3 N 4 It has a thicker multi-layer structure, and reducing the thickness of the layered material can obtain a series of more ...

Claims

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Application Information

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IPC IPC(8): C01B21/082
CPCC01B21/0605C01P2004/60C01P2004/04
Inventor 沈少华赵大明
Owner XI AN JIAOTONG UNIV
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