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A green and efficient method and application for preparing graphitic carbon nitride nanosheets

A graphitic carbon nitride and nanosheet technology, which is applied in chemical instruments and methods, catalyst activation/preparation, hydrogen production, etc., can solve the problem of low synthetic yield of graphitic carbon nitride nanosheets, pollution in the preparation process, etc. problems such as poor controllability, to achieve the effects of easy large-scale preparation, improved photocatalytic performance, and low synthesis cost

Active Publication Date: 2021-06-01
FUZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Mainly use metal to catalyze the steam reforming reaction, so as to accelerate the exfoliation of layered graphitic carbon nitride by water vapor, and then quickly and efficiently synthesize graphitic carbon nitride nanosheets, which solves the current problem in the synthesis of graphitic carbon nitride nanosheets. Problems such as low yield, poor controllability and pollution in the preparation process

Method used

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  • A green and efficient method and application for preparing graphitic carbon nitride nanosheets
  • A green and efficient method and application for preparing graphitic carbon nitride nanosheets
  • A green and efficient method and application for preparing graphitic carbon nitride nanosheets

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Embodiment 1

[0023] (1) Take 10 g of melamine and add it to a ceramic crucible with a cover, and carry out high-temperature polymerization in a muffle furnace. The polymerization temperature is 550 ° C, and the temperature is kept at a constant temperature for three hours. After cooling, a yellow bulk graphite phase carbon nitride is obtained; the sample is ground to obtain Yellow powder, graphite phase carbon nitride;

[0024] (2) Take 0.3 g of the above-mentioned graphitic carbon nitride, disperse it into 100 mL of water, add 0.5 mL of chloroplatinic acid (the concentration of chloroplatinic acid is 1 g / 100 mL), and irradiate with a xenon lamp light source for 4 h after vacuuming. 15°C; after the reaction is completed, the above sample is washed with ethanol and water to obtain Pt / graphite phase carbon nitride;

[0025] (3) Take 0.2 g of Pt / graphite-phase carbon nitride prepared in step 2), and feed water vapor / Ar mixed gas into the tube furnace, the flow rate of the mixed gas is 100 mL / ...

Embodiment 2

[0028] (1) Take 10 g of melamine and add it to a ceramic crucible with a cover, and carry out high-temperature polymerization in a muffle furnace. The polymerization temperature is 550 ° C, and the temperature is kept at a constant temperature for three hours. After cooling, a yellow bulk graphite phase carbon nitride is obtained; the sample is ground to obtain Yellow powder, graphite phase carbon nitride;

[0029] (2) Take 0.3 g of the above-mentioned graphitic carbon nitride, disperse it into 100 mL of water, add 0.5 mL of chloroplatinic acid (the concentration of chloroplatinic acid is 1 g / 100 mL), and irradiate with a xenon lamp light source for 4 h after vacuuming. (12 ℃); after the reaction is completed, the above samples are washed with ethanol and water to obtain Pt / graphite carbon nitride;

[0030] (3) Take 0.3 g of Pt / graphite-phase carbon nitride prepared in step 2), and feed water vapor / Ar mixed gas into the tube furnace, the flow rate of the mixed gas is 100 mL / mi...

Embodiment 3

[0032] (1) Take 10 g of melamine and add it to a ceramic crucible with a cover, and carry out high-temperature polymerization in a muffle furnace. The polymerization temperature is 550 ° C, and the temperature is kept at a constant temperature for three hours. After cooling, a yellow bulk graphite phase carbon nitride is obtained; the sample is ground to obtain Yellow powder, graphite phase carbon nitride;

[0033] (2) Take 0.3 g of the above graphitic carbon nitride, disperse it into 100 mL of water, add 0.5 mL of chloroplatinic acid (the concentration of chloroplatinic acid is 1 g / 100 mL), and irradiate with xenon light source for 4 hours after vacuuming. The reaction temperature is (18°C); after the reaction was completed, the above samples were washed with ethanol and water to obtain Pt / graphite phase carbon nitride;

[0034] (3) Take 0.3 g of Pt / graphite-phase carbon nitride prepared in step 2), and feed water vapor / Ar mixed gas into the tube furnace, the flow rate of the...

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Abstract

The invention discloses a green and high-efficiency preparation method and application of graphite-phase carbon nitride nanosheets. The method uses layered graphite phase carbon nitride material as raw material, and obtains Pt / graphite phase carbon nitride by modifying Pt nanoparticles on the surface of graphite phase carbon nitride; Pt / carbon nitride is placed in a tube furnace, and Through high-temperature water vapor treatment, graphite-phase carbon nitride nanosheets can be obtained. The preparation method provided by the invention has simple process, mild and controllable conditions, and high yield of graphite-phase carbon nitride nanosheets. The specific surface area of ​​the obtained graphitic carbon nitride nanosheets is significantly increased, the charge separation is significantly improved, and it has good photocatalytic performance.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a green and high-efficiency preparation method and application of graphite-phase carbon nitride nanosheets. Background technique [0002] Carbon nitride has five allotropes, namely α phase, β phase, cubic phase, quasi-cubic phase and graphite phase, among which the graphite phase structure is the most stable. Graphite carbon nitride is widely used in photocatalytic pollutant degradation, photocatalytic water splitting for hydrogen production, photocatalytic organic synthesis, photocatalytic carbon dioxide reduction, etc. research field has been widely used. Recently, graphitic carbon nitride has gradually been applied in solar cells, fuel cells, thermal catalysis, biomedicine, etc. However, graphitic carbon nitride still has some problems as a photocatalyst, such as small specific surface area, high exciton binding energy, and limited response to vi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J37/08B01J37/02B01J37/34B01J37/10C01B3/04
CPCB01J27/24B01J35/0013B01J35/004B01J37/0201B01J37/08B01J37/10B01J37/344C01B3/042Y02E60/36
Inventor 王心晨杨朋举汪锐睿
Owner FUZHOU UNIV
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