Method for preparing graphite phase carbon nitride nanosheet through airtight oxidation

A technology of graphite phase carbon nitride and nanosheets, which is applied in chemical instruments and methods, nitrogen compounds, nanotechnology, etc., can solve the problems of less product structure defects, high yield, and fewer steps, and achieve good morphology and high yield. The effect of high efficiency and low cost

Active Publication Date: 2017-03-22
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem solved by the present invention is to provide a method for quickly and efficiently preparing high-quality graphitic carbon nitride nanosheets, which has fewer steps, less time-consuming, fewer structural defects in the product, and high yield

Method used

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  • Method for preparing graphite phase carbon nitride nanosheet through airtight oxidation
  • Method for preparing graphite phase carbon nitride nanosheet through airtight oxidation
  • Method for preparing graphite phase carbon nitride nanosheet through airtight oxidation

Examples

Experimental program
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Effect test

Embodiment 1

[0032]Add 0.6g of graphite phase carbon nitride, 3g of potassium permanganate, and 30ml of concentrated sulfuric acid to the polytetrafluoroethylene lining in sequence. Tighten the stainless steel reaction kettle, seal it, and place it in the refrigerator (0-5°C) for 1.5h. After taking it out, tighten the reactor again and place it in an oven (80°C) for heating for 1.5h. Then take out the reactor and cool to normal temperature. Dilute with 400ml deionized water, and add 30% hydrogen peroxide while stirring until the solution becomes pure white and stop adding. Finally, it was washed with 600ml of 5% hydrochloric acid and 1000ml of deionized water to neutrality, and dried in an oven (60°C).

[0033] figure 1 The laser image of the graphitic phase carbon nitride nanosheet prepared for the present invention, from figure 1 It can be seen that the product obtained in the experiment will produce Tyndall effect when irradiated with laser light, indicating that the size of the pro...

Embodiment 2

[0035] Add 0.6g of graphite phase carbon nitride, 3g of potassium permanganate, and 30ml of concentrated sulfuric acid to the polytetrafluoroethylene lining in sequence. Tighten the stainless steel reaction kettle, seal it, and place it in the refrigerator (0-5°C) for 1.5h. After taking it out, tighten the reactor again and place it in an oven (80°C) for heating for 1.5h. Then take out the reactor and cool to normal temperature. Dilute with 400ml deionized water, and add 30% hydrogen peroxide while stirring until the solution becomes pure white and stop adding. Filter and wash with deionized water until neutral, and dry in an oven (60°C). 100mg of graphitic carbon nitride nanosheets were obtained.

[0036] figure 2 Transmission electron microscopy (TEM) of graphitic phase carbon nitride nanosheets prepared for the present invention.

Embodiment 3

[0038] Add 0.6g of graphite phase carbon nitride, 3g of potassium permanganate, and 30ml of concentrated sulfuric acid to the polytetrafluoroethylene lining in sequence. Tighten the stainless steel reaction kettle, seal it, and place it in the refrigerator (0-5°C) for 1.5h. After taking it out, tighten the reactor again and place it in an oven (80°C) for heating for 1.5h. Then take out the reactor and cool to normal temperature. Dilute with 400ml deionized water, and add 30% hydrogen peroxide while stirring until the solution becomes pure white and stop adding. Finally, it was washed with 600ml of 5% hydrochloric acid and 1000ml of deionized water until neutral, and freeze-dried.

[0039] image 3 Fluorescence figure (FL) of the graphitic phase carbon nitride nanosheet prepared for the present invention, from image 3 It can be seen that the fluorescence intensity of graphitic carbon nitride is significantly stronger than that of graphitic carbon nitride.

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Abstract

The invention discloses a method for preparing a graphite phase carbon nitride nanosheet through airtight oxidation. The method comprises the following steps: with a layered graphite phase carbonitride material as a raw material, putting the layered graphite phase carbonitride material, potassium permanganate and concentrated sulfuric acid in an enclosed reaction vessel with a polytetrafluoroethylene lining for a pressurized oxidation reaction so as to obtain oxidized graphite phase carbon nitride; removing unreacted potassium permanganate with hydrogen peroxide; carrying out washing with hydrochloric acid and distilled water; and then carrying out drying so as to obtain the graphite phase carbon nitride nanosheet. Compared with conventional methods, the method provided by the invention has the advantages of less operation steps, low temperature requirement and short reaction time. The prepared graphite phase carbon nitride nanosheet has high purity and few structural defects and has extensive application prospects in fields like heterogeneous catalysis, photocatalysis and biological imaging.

Description

technical field [0001] The invention relates to a method for preparing graphite-phase carbon nitride nano-sheets, in particular to a method for rapidly preparing graphite-phase carbon nitride nano-sheets by using a closed pressurized oxidation reaction in a polytetrafluoroethylene-lined reactor. [0002] technical background [0003] There are five allotropes in carbon nitride materials, namely alpha phase, beta phase, cubic phase, quasi-cubic phase and graphite phase. Among them, graphite phase carbon nitride, namely g-C 3 N 4 is the most stable one. 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. But g-C 3 N 4 As a photocatalyst, there are some disadvantages, such as sma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B21/082B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01B21/0605C01P2004/04C01P2004/64
Inventor 包木太王亚萌钱方方杨晓龙蔡昊原韩长波
Owner OCEAN UNIV OF CHINA
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