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Hydrogen peroxide modified graphite phase carbon nitride nanosheet and preparation method thereof

A graphitic carbon nitride and hydrogen peroxide technology, applied in the field of photocatalysis, can solve problems such as unfavorable large-scale promotion, low surface activity, unsatisfactory effect, etc., and achieve the effect of multiple surface active sites and surface performance optimization.

Inactive Publication Date: 2020-05-05
CHANGZHOU INST OF TECH
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0003] However, serious electron-hole recombination, limited photoresponse range, large grain size of the product caused by high-temperature calcination, and low surface activity all restrict g-C 3 N 4 photocatalytic performance
Therefore, g-C prepared by direct high-temperature calcination 3 N 4 The photocatalytic performance of the product is very low, which cannot meet the requirements of large-scale industrial production and application
[0004] At present, acid (nitric acid, sulfuric acid, hydrochloric acid, etc.), alkali (sodium hydroxide, potassium hydroxide, etc.) and other solvents are commonly used for g-C 3 N 4 Post-processing, but the effect is not ideal
And a large amount of strong acid and strong alkali is used, which is not only environmentally unfriendly, but also unfavorable for large-scale promotion.

Method used

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  • Hydrogen peroxide modified graphite phase carbon nitride nanosheet and preparation method thereof
  • Hydrogen peroxide modified graphite phase carbon nitride nanosheet and preparation method thereof
  • Hydrogen peroxide modified graphite phase carbon nitride nanosheet and preparation method thereof

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Embodiment 1

[0054] a H 2 o 2 g-C 3 N 4 The preparation method of nano sheet, comprises the following steps: specific as figure 1 Shown:

[0055] (1)Urea g-C 3 N 4 The preparation method:

[0056] Put 25g of urea in a covered ceramic crucible, control the heating rate of the muffle furnace to 8°C / min, heat the crucible to 550°C, and keep it for 3 hours; after cooling to room temperature, grind the solid matter in the crucible to obtain Pale yellow solid, namely Urea g-C 3 N 4 Powder (UCN).

[0057] (2)H 2 o 2 g-C 3 N 4 Preparation method of nanosheets:

[0058] 800mg Urea g-C 3 N 4 Powdered UCN added to H 2 o 2 (30%, 20mL) and absolute ethanol (10mL) in a mixed solvent, stirred at room temperature (25°C) for 30min and then ultrasonically (power 500W) for 12 hours to obtain a mixed solution; then pass the mixed solution obtained in the previous step through Centrifuge at 6000rpm for 10 minutes to obtain wet g-C 3 N 4 nanoflakes; then the wet g-C 3 N 4 The nanoflakes...

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Abstract

The invention discloses a hydrogen peroxide modified graphite phase carbon nitride nanosheet and a preparation method thereof, and belongs to the technical field of photocatalysis. The preparation method of the H2O2 g-C3N4 nanosheet comprises the following steps: (1) adding Urea g-C3N4 powder into a mixed solvent of H2O2 and ethanol, performing stirring, and then carrying out ultrasonic treatmentto uniformly disperse the solution to obtain a mixed solution; (2) centrifuging and drying the mixed solution obtained in the step (1) to obtain a solid; and (3) grinding the solid obtained in the step (2) into fine powder, putting the fine powder into a crucible, and carrying out high-temperature calcination to obtain the hydrogen peroxide modified graphite phase carbon nitride H2O2 g-C3N4, called HCN for short. Compared with UCN, the modified HCN photocatalyst disclosed by the invention has the advantage that the photocatalytic activity is obviously improved.

Description

technical field [0001] The invention relates to a hydrogen peroxide-modified graphite-phase carbon nitride nanosheet and a preparation method thereof, belonging to the technical field of photocatalysis. Background technique [0002] Increasing environmental pollution and fossil energy crisis are harmful to human health and living ecosystems. Semiconductor photocatalysis is considered as a green and attractive technology to harness the inexhaustible and clean solar energy for renewable energy production and environmental restoration. In recent years, various highly efficient photocatalysts have attracted extensive attention due to their application potential in solar energy conversion. Among them, graphitic carbon nitride (g-C 3 N 4 ) is a metal-free polymer semiconductor with a layered structure, which has tremendous performance as a new type of photocatalyst. [0003] However, serious electron-hole recombination, limited photoresponse range, large grain size of the prod...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J37/08B01J35/10B82Y30/00B82Y40/00C01B3/04C02F1/30C02F101/30
CPCB01J27/24B01J37/08B82Y30/00B82Y40/00C01B3/042C02F1/30C02F2305/10C02F2101/30B01J35/39B01J35/615B01J35/633Y02E60/36
Inventor 蒋恒飞王玮罗元钟盛建钊周品
Owner CHANGZHOU INST OF TECH
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