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Porous-heterostructure composite photocatalyst and preparation method thereof

A photocatalyst and heterostructure technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., to achieve good photocatalytic degradation of pollutants, simple process, high application prospects and practical value.

Inactive Publication Date: 2017-01-25
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, this photocatalyst is only used for the pollution of volatile organic compounds (VOCs) such as formaldehyde and benzene series (benzene, toluene, xylene), and is not suitable for pollutants in water bodies.

Method used

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  • Porous-heterostructure composite photocatalyst and preparation method thereof
  • Porous-heterostructure composite photocatalyst and preparation method thereof
  • Porous-heterostructure composite photocatalyst and preparation method thereof

Examples

Experimental program
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Effect test

preparation Embodiment 1

[0042] A porous heterostructure photocatalyst as α-Fe 2 o 3 / g -C 3 N 4 , the preparation method is as follows: take ferric nitrate and urea with a mass fraction of ferric nitrate of 0.5%, and place them in a container filled with distilled water; move the container to a water bath, and stir magnetically at a temperature of 20°C for 10 minutes, Obtain a solution; move the stirred solution in a water bath to an oven, and dry at 60°C for 4 hours to obtain a mixture of ferric nitrate and urea; move the dried mixture to a muffle furnace for calcination, wherein the heating rate during the heating process is 5°C / min, the constant temperature is 520°C, and the constant temperature time is 2h; after calcination, it is naturally cooled and ground to obtain a photocatalyst with a porous heterogeneous structure.

preparation Embodiment 2

[0044] A porous heterostructure photocatalyst as α-Fe 2 o 3 / g -C 3 N 4 , the preparation method is: taking ferric nitrate and urea with a mass fraction of ferric nitrate of 3.0%, placing them in a container filled with distilled water; moving the container to a water bath, stirring magnetically for 120 min at a temperature of 40°C, Obtain a solution; move the stirred solution in a water bath to an oven, and dry it at 100°C for 6 hours to obtain a mixture of ferric nitrate and urea; move the dried mixture to a muffle furnace for calcination, wherein the heating rate during the heating process is 20°C / min, the constant temperature is 580°C, and the constant temperature time is 4h; after calcination, it is naturally cooled and ground to obtain a photocatalyst with a porous heterogeneous structure.

preparation Embodiment 3

[0046] A porous heterostructure photocatalyst as α-Fe 2 o 3 / g -C 3 N 4 , the preparation method is as follows: take ferric nitrate and urea with a mass fraction of ferric nitrate of 1.5%, and place them in a container filled with distilled water; move the container to a water bath, and stir magnetically for 60 minutes at a temperature of 30° C., Obtain a solution; move the stirred solution in a water bath to an oven, and dry at 80°C for 6 hours to obtain a mixture of ferric nitrate and urea; move the dried mixture to a muffle furnace for calcination, wherein the heating rate during the heating process is 17°C / min, the constant temperature is 550°C, and the constant temperature time is 3h; after calcination, it is naturally cooled and ground to obtain a photocatalyst with a porous heterogeneous structure.

[0047] Comparative experiment 1

[0048] Preparation of α-Fe with Porous Heterostructure by Regulating the Ratio of Ferric Nitrate and Urea 2 o 3 / g -C 3 N 4 .

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Abstract

The invention relates to the technical field of photocatalytic materials and a preparation method thereof, in particular to a porous-heterostructure composite photocatalyst and a preparation method thereof. The porous-heterostructure composite photocatalyst is characterized by being an iron trioxide and g-C3N4 compound, the iron trioxide is embedded in the surface or the inner surface of the g-C3N4 and is combined with the g-C3N4 through the Van der Waals' force; the specific surface area of the photocatalyst is 52.57-90.18m<2> / g, and the bore diameter of the photocatalyst is 20-100nm. By the arrangement of the porous-heterostructure catalyst of the a-Fe2O3 / g-C3N4 and the preparation method thereof, good performance of the catalyst on photocatalystic degradation of pollutants is achieved, and purification treatment of the pollutants in water is satisfied; compared with the prior art, the porous-heterostructure composite photocatalyst has the advantages that the template-free method is adopted, the high specific surface area of the a-Fe2O3 / g-C3N4 is achieved, and the porous-heterostructure composite photocatalyst is cheap in raw materials, simple in technology and high in application prospect and practical value.

Description

technical field [0001] The invention relates to the technical field of photocatalytic materials and preparation methods thereof, in particular to a composite photocatalyst with a porous heterogeneous structure and a preparation method thereof. Background technique [0002] With the rapid development of industry, environmental pollution has gradually become a major problem restricting human survival and development. Due to the high catalytic activity and stability, low price and environmental friendliness of photocatalytic technology, there is great room for development in the field of environmental pollution control. [0003] g-C 3 N 4 is a triazine ring (-C 3 N 3 ) unit composed of graphite-like polymer semiconductor, its bandgap width is about 2.7eV, it responds to visible light, the source is abundant, and the synthesis cost is very low. However, conventional g-C 3 N 4 The product obtained by the preparation method has a single structure, a small specific surface a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C02F1/30
CPCC02F1/30B01J27/24C02F2305/10B01J35/39B01J35/613B01J35/651B01J35/647
Inventor 赵朝成王帅军闫青云王德军董培谷朝阳王永强刘芳
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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