A kind of preparation method of phosphorus doped carbon nitride

A carbon nitride and phosphorus doping technology, which is applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problems of insufficient photocatalytic performance and low visible light absorption, and achieve improved photocatalytic performance. Excellent performance, high visible light absorption, and simple operation

Active Publication Date: 2022-04-05
SHANGHAI NAT ENG RES CENT FORNANOTECH
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Problems solved by technology

[0006] In view of the disadvantages of low visible light absorption and insufficient photocatalytic performance in the existing preparation of carbon nitride, the purpose of the present invention is to provide a method for preparing phosphorus-doped carbon nitride

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  • A kind of preparation method of phosphorus doped carbon nitride

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Embodiment 1

[0019] A phosphorus-doped carbon nitride, using nitrogen-rich organic matter melamine as the carbon nitride precursor, red phosphorus as the phosphorus source, first prepared block carbon nitride by conventional calcination, and then by combining carbon nitride and phosphorus The mixing and grinding of simple substances makes phosphorus doped into the molecular structure of carbon nitride, and finally the undoped phosphorus is removed by roasting. It is prepared according to the following steps:

[0020] 1) First put the carbon nitride precursor melamine into the ceramic crucible, cover the lid, put it into the muffle furnace, heat it up to 550°C at a heating rate of 2°C / min and keep it roasted for 3 hours, then cool it naturally Obtain massive carbon nitride;

[0021] 2) Add red phosphorus to the above block carbon nitride so that the mass ratio of carbon nitride to red phosphorus is 1:1, and put it into a stainless steel grinding tank according to the mass ratio of grinding ...

Embodiment 2

[0023] A phosphorus-doped carbon nitride, using dicyandiamide as carbon nitride to prepare a precursor, yellow phosphorus as a phosphorus source, prepared according to the following steps:

[0024] 1) First put the carbon nitride precursor dicyandiamide into the ceramic crucible, cover the lid, put it into the muffle furnace, heat it to 600°C at a heating rate of 5°C / min and keep it roasted for 3 hours. After cooling, block carbon nitride is obtained;

[0025] 2) Add yellow phosphorus to the above block carbon nitride, so that the mass ratio of carbon nitride and yellow phosphorus is 1:2, and put it into the zirconia grinding jar according to the mass ratio of grinding balls and carbon nitride as 1:200 , after grinding for 60 hours at a speed of 25 Hz, phosphorus-doped carbon nitride can be obtained.

Embodiment 3

[0027] A phosphorus-doped carbon nitride is prepared by using urea as a precursor for carbon nitride, black phosphorus as a phosphorus source, and is prepared according to the following steps:

[0028] 1) Put urea, the precursor of carbon nitride, into a ceramic crucible, cover it, put it into a muffle furnace, heat it to 500°C at a heating rate of 10°C / min and keep it roasted for 5 hours. After natural cooling, the Obtain massive carbon nitride;

[0029] 2) Add black phosphorus to the above block carbon nitride so that the mass ratio of carbon nitride to black phosphorus is 1:5, and put it into the agate grinding jar according to the mass ratio of grinding balls to carbon nitride as 1:50, After grinding for 30 hours at a rotational speed of 50 Hz, phosphorus-doped carbon nitride can be obtained.

[0030] The EDS analysis figure of the phosphorus-doped carbon nitride prepared by the method of the present invention is as follows figure 1 , the figure proves that phosphorus el...

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Abstract

The invention provides a method for preparing phosphorus-doped carbon nitride, which uses nitrogen-rich organic matter as a precursor to prepare carbon nitride, and simple phosphorus as a phosphorus source. First, block carbon nitride is prepared by conventional calcination, and then by The mixed grinding method of carbon nitride and phosphorus element allows phosphorus element to be doped into the molecular structure of carbon nitride, and finally the undoped phosphorus element is removed by roasting. The phosphorus-doped carbon nitride obtained by the preparation method proposed by the invention has moderate band gap, high visible light absorption, good photocatalytic performance, simple operation and low preparation difficulty.

Description

technical field [0001] The invention belongs to the field of preparation of nanometer materials, and in particular relates to a preparation method of phosphorus-doped carbon nitride. Background technique [0002] With the rapid development of modern society, the world is facing more and more severe energy crisis and environmental pollution. Therefore, solving energy shortage and environmental problems has become an urgent problem for human development. Photocatalytic technology has the characteristics of low cost and environmental friendliness. It can use sunlight to drive many important chemical reactions, such as photolysis of water to produce hydrogen, degradation of pollutants, and nitrogen fixation. It has become a new hope for future high-tech. However, the narrow photoresponse range of existing photocatalytic materials and the low utilization rate of solar energy have become the bottleneck restricting the application of photocatalytic materials. Therefore, it is par...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24
CPCB01J27/24B01J35/004
Inventor 徐少洪王敬锋林琳吴晓燕金彩虹
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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