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Aromatic ring and cyano group co-doped carbon nitride nanosheet as well as preparation method and application thereof

A technology of carbon nitride and co-doping, applied in nanotechnology, chemical instruments and methods, nanotechnology, etc. for materials and surface science, can solve the problem of unseen thermal preparation methods and narrow carbon nitride light absorption range To achieve the effects of improving photocatalytic performance, widening the response range of visible light, good controllability and universality

Pending Publication Date: 2022-05-10
JIANGSU UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, photocatalytic water splitting to produce hydrogen is one of the important means to convert solar energy into clean and usable chemical energy. Exploring a highly efficient, stable and visible light-responsive semiconductor catalyst has always been the core issue in this field. Graphite carbon nitride (g-C 3 N 4 ) As an excellent semiconductor visible light catalyst, it has the characteristics of high efficiency, stability, and visible light response, but carbon nitride has the defect of narrow light absorption range, so improving the absorption range of carbon nitride to visible light is to improve its photocatalytic performance. effective method
At present, there is no report on the one-step solvothermal preparation of carbon nitride co-doped with aromatic rings and cyano groups

Method used

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  • Aromatic ring and cyano group co-doped carbon nitride nanosheet as well as preparation method and application thereof
  • Aromatic ring and cyano group co-doped carbon nitride nanosheet as well as preparation method and application thereof
  • Aromatic ring and cyano group co-doped carbon nitride nanosheet as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Weigh 5g of urea, finely grind and evenly disperse it in 30mL of dimethyl sulfoxide, add 2mg of p-aminobenzaldehyde and stir well, put it in a reaction kettle to heat and react, the constant temperature is 200°C, the constant temperature time is 12h, and the product is obtained by alcohol washing and drying UCN-PABA-0.002.

[0030] from figure 1 It can be seen from the scanning electron microscope that the sample UCN-PABA-0.002 is a porous sheet structure with a slightly curled edge and a uniform surface. At 2θ=12.9° and 27.2°, they correspond to the (100) and (002) planes of GCN, respectively. ( figure 2 ), and absorbs in visible light ( image 3 ), under visible light irradiation (a 300W xenon lamp is equipped with a filter of λ≥420nm) for photocatalytic reaction, and the hydrogen production rate is 18.66 μmol / h.

Embodiment 2

[0032] The photocatalyst was prepared according to the method of Example 1, except that the doping amount of PABA was 4 mg, and other conditions remained unchanged, and it was named UCN-PABA-0.004.

[0033] Under the same photocatalytic reaction conditions as in Example 1, the hydrogen production rate was 26.26 μmol / h.

Embodiment 3

[0035] The photocatalyst was prepared according to the method of Example 1, except that the doping amount of PABA was 6 mg, and other conditions remained unchanged, and it was named UCN-PABA-0.006.

[0036] Under the same photocatalytic reaction conditions as in Example 1, the hydrogen production rate was 30.67 μmol / h.

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Abstract

The invention provides an aromatic ring and cyano-codoped carbon nitride nanosheet and a preparation method and application thereof, and the preparation method comprises the following steps: (1) dispersing a nitrogen-rich organic matter in an organic solvent to obtain a dispersion liquid; and (2) uniformly stirring an aromatic compound, and sequentially heating, washing with alcohol and drying to obtain the aromatic ring and cyano-codoped carbon nitride nanosheet. An aromatic compound is integrated into a traditional carbon nitride synthesis route, that is, a nitrogen-rich organic matter and the aromatic compound are polymerized through a solvothermal method to obtain the conjugated polymer. The preparation method of the aromatic ring and cyano-codoped carbon nitride nanosheet provided by the invention has the advantages of simplicity, low cost, high photocatalytic efficiency and good stability.

Description

technical field [0001] The invention relates to the technical field of material preparation, in particular to a carbon nitride nanosheet co-doped with an aromatic ring and a cyano group, and a preparation method and application thereof. Background technique [0002] Under the double influence of environmental problems and energy crisis, clean energy has been widely developed and utilized. Among them, photocatalytic water splitting to produce hydrogen is one of the important means to convert solar energy into clean and usable chemical energy. Exploring a highly efficient, stable, and visible light-responsive semiconductor catalyst has always been a core issue in this field. Graphite carbon nitride (g-C 3 N 4 ) as an excellent semiconductor visible light catalyst, has the characteristics of high efficiency, stability, and visible light response, but carbon nitride has the defect of narrow light absorption range, so improving the absorption range of carbon nitride to visible ...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J31/02B01J35/10C01B3/04B82Y30/00B82Y40/00
CPCB01J27/24B01J31/0248C01B3/042B82Y30/00B82Y40/00B01J35/60B01J35/40B01J35/39Y02E60/36
Inventor 孙建华王岩牟志刚高阳陆杨葛文雅仲蕾
Owner JIANGSU UNIVERSITY OF TECHNOLOGY
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