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Preparation method of supported carbon nitride photo-catalyst

A supported, catalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, separation methods, etc., can solve the problems of powder photocatalyst limitation, hindering the process of industrialization, and inability to reuse, and achieve high efficiency and stability. Photocatalytic activity, increasing loading, and effect of increasing loading and reaction sites

Active Publication Date: 2014-03-19
CHONGQING TECH & BUSINESS UNIV
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  • Description
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  • Application Information

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Problems solved by technology

However, expensive nanofiltration technology and time-consuming separation process will hinder its industrialization process, and the use of powdered carbon nitride mixed with the separated phase will cause catalyst loss and cannot be reused, making powder photocatalysts in the future The practical application of air purification will be greatly restricted

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  • Preparation method of supported carbon nitride photo-catalyst
  • Preparation method of supported carbon nitride photo-catalyst
  • Preparation method of supported carbon nitride photo-catalyst

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preparation example Construction

[0052] The invention provides a kind of preparation method of supported carbon nitride photocatalyst, comprises the following steps:

[0053] Mix the carrier and the carbon and nitrogen source in water, and obtain the photocatalyst precursor after impregnation;

[0054] Recrystallizing the photocatalyst precursor after drying to obtain a recrystallized product;

[0055] The recrystallized product is calcined to obtain a supported carbon nitride photocatalyst.

[0056]In the method provided by the invention, the carrier and the carbon nitrogen source are recrystallized in water and then calcined to obtain a loaded carbon nitride photocatalyst. In the loaded carbon nitride photocatalyst obtained by the method provided by the present invention, there is a firmer binding force between the carrier and the carbon nitride, so that the obtained photocatalyst has a more efficient and stable photocatalytic activity, and it is effective against 600ppb levels of NO The removal rate is k...

Embodiment 1

[0088] Rinse 171.235g of alumina foam ceramics with deionized water three times, dry them, and place them in a muffle furnace for pretreatment at 300°C for 1 hour, then cool them down for use. Add 40g of thiourea to 300mL of deionized water, stir with a glass rod for 20 minutes, transfer the pretreated alumina foam ceramics into a large crucible, continue to add water until the liquid level is at least below the surface of the carrier, turn over the carrier several times, at 70 Recrystallized at ℃ for 12h. Cover the crucible containing the sample and put it into a muffle furnace, calcinate at 550°C for 2 hours, cool and recover to obtain supported carbon nitride.

[0089] The present invention studies the photocatalytic activity of the obtained loaded carbon nitride, and the specific process is as follows: in an environment where the relative humidity is 60% and the oxygen content is 21%, the obtained loaded carbon nitride is placed in the NO flow, The initial concentration o...

Embodiment 2

[0091] Rinse 170.768g of alumina foam ceramics with deionized water three times, dry them, and place them in a muffle furnace for pretreatment at 300°C for 1 hour, then cool them down for use. Add 40g of dicyandiamide to 300mL of deionized water, stir with a glass rod for 20 minutes, transfer the pretreated alumina foam ceramics into a large crucible, continue to add water until the liquid level is at least above the surface of the carrier, turn over the carrier several times, Recrystallize at 70°C for 12h. Cover the crucible containing the sample and put it into a muffle furnace, calcinate at 550°C for 2 hours, cool and recover to obtain supported carbon nitride.

[0092] The present invention adopts the test scheme of photocatalytic activity in embodiment 1, the photocatalytic activity of the supported carbon nitride obtained in this embodiment is tested, and the result is as follows figure 2 and as shown in Table 1, figure 2 For the NO removal rate figure of the loaded ...

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Abstract

The invention provides a preparation method of a supported carbon nitride photo-catalyst. The preparation method of the supported carbon nitride photo-catalyst comprises the following steps: mixing a carrier and a carbon and nitrogen source in water, and dipping to obtain a photo-catalyst precursor; recrystallizing the photo-catalyst precursor to obtain a recrystallization product; and calcinating the recrystallization product to obtain a supported carbon nitride photo-catalyst. Through the method, the carrier and the carbon and nitrogen source are mixed in the water to be dissolved, and recrystallizing and calcinating are carried out to obtain the supported carbon nitride photo-catalyst. The supported carbon nitride photo-catalyst prepared by the preparation method is in an in-situ supported type, so that a firm bonding force is formed between the carrier and a catalyst core component; meanwhile, a support amount and a supported evenness of the catalyst core component are improved; consequently, the supported carbon nitride photo-catalyst is efficient and stable in photo-catalytic activity and is beneficial to the actual application of the carbon nitride photo-catalyst.

Description

technical field [0001] The invention relates to the practical application field of photocatalysis technology, in particular to a preparation method of a supported carbon nitride photocatalyst. Background technique [0002] Faced with the challenges and pressures of environmental pollution in recent years, green chemical technology has become an inevitable requirement for the sustainable development of human society. In recent years, with the development of photocatalytic technology, the realization of photocatalytic technology with the help of solar energy has shown great application potential in the fields of environmental pollution purification and conversion of solar energy into chemical energy. Because it uses energy (light energy) in a simple way, it can be effectively used whether it is natural light or artificial indoor lighting. Especially in the field of air purification, it has been highly regarded as it offers a new and more attractive alternative to more traditi...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01D53/86B01D53/56
Inventor 董帆王震宇王瑞肖香冯欣
Owner CHONGQING TECH & BUSINESS UNIV
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