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d-g-c 3 no 4 Preparation method and application of visible light catalytic material

A d-g-c3n4, catalytic material technology, applied in the field of environment and chemistry, can solve problems such as limitations

Active Publication Date: 2021-05-04
BEIJING JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, traditional g-C 3 N 4 It can only absorb visible light below 450nm, which greatly limits the g-C 3 N 4 practical application of

Method used

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  • d-g-c <sub>3</sub> no <sub>4</sub> Preparation method and application of visible light catalytic material

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Embodiment

[0032] This embodiment provides a D-g-C 3 N 4 (Defective carbon nitride) preparation method, comprises the following steps:

[0033] Step 1, first grinding ammonium persulfate and melamine with a mass ratio of 1.5:3 until fully mixed to obtain a mixture;

[0034] Step 2. Put the uniformly ground mixture into a muffle furnace, raise the temperature to 600°C at a heating rate of 4°C / min and keep it for two hours. After natural cooling, grind to obtain D-g-C 3 N 4 .

[0035] For the D-g-C obtained by the above method 3 N 4 to analyze, among them, figure 1 D-g-C obtained for this embodiment 3 N 4 and g-C 3 N 4 The ESR diagram, it can be seen from the figure that D-g-C 3 N 4A strong ESR peak is shown, which is mainly attributed to the generation of more lone pairs of electrons due to defect formation.

[0036] figure 2 D-g-C obtained for this embodiment 3 N 4 and g-C 3 N 4 The UV-vis map, through figure 2 It can be seen that D-g-C 3 N 4 The absorption of visi...

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Abstract

The present invention provides a D-g-C 3 N 4 A preparation method and application of a visible light catalytic material, comprising: step 1, mixing ammonium persulfate with one of melamine, urea, and thiourea at a mass ratio of 0.75:3 to 2:3, and grinding the mixture evenly to obtain the mixture ; Step 2, put the mixture into a muffle furnace, heat to 500-650°C and keep it for two hours, cool naturally and grind to obtain D-g-C 3 N 4 . D-g-C of the present invention 3 N 4 It can effectively inhibit the recombination of electron-hole pairs, and has higher catalytic efficiency than ordinary g-C 3 N 4 The catalytic efficiency is increased by 3-4 times.

Description

technical field [0001] The present invention relates to the field of environmental and chemical technology, in particular to a D-g-C 3 N 4 Preparation method and application of visible light catalytic material. Background technique [0002] With the rapid development of world industry, especially in developing countries, organic dye pollution is one of the important sources of water environment pollution, and the annual output of organic dye is 7×10 5 t, is widely used in papermaking, leather processing, textile dyeing, cosmetics and pharmaceutical manufacturing and other industries. my country is a big country in the production and use of antibiotics. At present, many antibiotics such as amoxicillin and cefotaxime sodium have been detected in environmental water bodies. The emission of volatile organic compounds (VOCs) causes atmospheric and indoor air pollution, which is extremely harmful to human health. At present, the methods to solve the organic pollution problems ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24C02F1/30C02F101/30C02F101/38
CPCB01J27/24B01J35/004C02F1/30C02F2101/308C02F2101/38C02F2101/40C02F2305/10
Inventor 王锦高博儒窦蒙蒙杨帆李树铭
Owner BEIJING JIAOTONG UNIV
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