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A kind of photocatalyst and its preparation method, application

A photocatalyst and modifier technology, applied in the field of photocatalysis, can solve the problems of high cost and limited improvement effect, and achieve the effect of increasing specific surface area, improving catalytic performance and increasing optical absorption

Active Publication Date: 2021-10-12
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Among the above measures, the main method is to improve the relevant performance of the photocatalyst by compounding with graphene or introducing heteroatoms, but the above methods are costly and the improvement effect is limited

Method used

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  • A kind of photocatalyst and its preparation method, application
  • A kind of photocatalyst and its preparation method, application
  • A kind of photocatalyst and its preparation method, application

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preparation example Construction

[0055] The invention also provides a preparation method of the photocatalyst, comprising the following steps: stirring and mixing the mesoporous carbon nitride and the graphene-like substance, and then drying.

[0056] Preferably, in some specific embodiments, the stirring temperature is above 30°C.

[0057] Preferably, in some specific embodiments, the stirring time is more than 12 hours.

[0058] Preferably, in some specific embodiments, the drying temperature is above 60°C.

[0059] The invention also provides the application of the photocatalyst in the degradation of pollutants.

[0060] In some embodiments of the present invention, a preparation method and application of an ultra-small graphene oxide / mesoporous carbon nitride composite photocatalyst are provided. Compared with the prior art, the preparation method of the present invention is simple and safe. It effectively improves the optical absorption efficiency, solves the defect of rapid recombination of photogener...

Embodiment 1

[0063] Composed of USGO / APCN, the mass fraction of the APCN is 98%, and the mass fraction of the ultra-small graphene is 2%. Its specific preparation method comprises the following steps:

[0064] (1) Add 0.02g of anionic polyacrylamide and 20mL of deionized water into a 50mL beaker, seal it and stir magnetically at 60°C for 30min to completely dissolve the polyacrylamide; dissolve 6g of melamine into the above polyacrylamide In the acrylamide solution, keep the temperature at 60°C and continue magnetic stirring. After the solution is evenly stirred, open the beaker, heat up and evaporate to collect the remaining solid, which is the precursor of polyacrylamide-melamine (APCN).

[0065] (2) Put the collected solid in a covered crucible, heat up to 600°C in a muffle furnace at a heating rate of 2.3°C / min, keep it for 4h, cool it down to room temperature naturally, and grind it in an agate mortar The gray powder is the block (APCN);

[0066] (3) Graphene oxide is prepared by a ...

Embodiment 2

[0069] Composed of USGO / APCN, the mass fraction of the APCN is 99%, and the mass fraction of the ultra-small graphene is 1%. Its specific preparation method comprises the following steps:

[0070] (1) Add 0.02g of anionic polyacrylamide and 20mL of deionized water into a 50mL beaker, seal it and stir magnetically at 60°C for 30min to completely dissolve the polyacrylamide; dissolve 6g of melamine into the above polyacrylamide In the acrylamide solution, keep the temperature at 60°C and continue magnetic stirring. After the solution is evenly stirred, open the beaker, heat up and evaporate to collect the remaining solid, which is the precursor of polyacrylamide-melamine (APCN).

[0071] (2) Put the collected solid in a covered crucible, heat up to 600°C in a muffle furnace at a heating rate of 2.3°C / min, keep it for 4h, cool it down to room temperature naturally, and grind it in an agate mortar The gray powder is the block (APCN);

[0072] (3) Graphene oxide is prepared by a ...

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Abstract

The invention provides a photocatalyst and its preparation method and application, which are mainly obtained by compounding graphene-like substances and mesoporous carbon nitride; bit aggregated. The photocatalyst of the present invention is a kind of composite material, by compounding the graphene substance and the mesoporous carbon nitride through mesoporous treatment, the specific surface area of ​​the photocatalyst has been effectively increased. materials, improved g‑C 3 N 4 The visible light catalytic activity increases the optical absorption of visible light and greatly improves the catalytic performance of photocatalytic materials.

Description

technical field [0001] The invention relates to the technical field of photocatalysis, in particular to a photocatalyst and its preparation method and application. Background technique [0002] With the depletion of fossil energy and the destruction of the ecological environment, the problems of energy shortage and environmental pollution have aroused people's great attention. Converting low-density solar energy into high-density chemical energy through photocatalytic technology to achieve hydrogen production and pollutant degradation by splitting water is one of the important methods to solve future energy shortages and environmental pollution. g-C 3 N 4 (Carbon nitride) has excellent chemical stability, unique semiconductor energy band structure, non-toxic and easy-to-obtain raw materials, and no metals. It is used in photocatalytic pollutant degradation, photocatalytic water splitting, hydrogen production, photocatalytic organic synthesis, etc. field has received wides...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24C02F1/30
CPCB01J27/24B01J35/004C02F1/30C02F2305/10
Inventor 包木太张安王亚萌李一鸣陆金仁王丽莎
Owner OCEAN UNIV OF CHINA
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