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Graphite phase carbon nitride catalyst preparation method

A graphite-phase carbon nitride and catalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of complex process, high cost, difficult large-scale preparation, etc., and achieve simple operation , low cost, and the effect of improving photocatalytic activity

Pending Publication Date: 2020-02-21
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Application Information

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Problems solved by technology

The method of the present invention uses cheap, green and non-toxic biomass to assist in the synthesis of graphite-phase carbon nitride catalysts, which can prepare graphite-phase carbon nitride catalysts in an environmentally friendly manner, and can overcome the traditional reliance on precious metals and other semiconductors to strengthen its performance, high cost and poor process. Disadvantages such as complexity and difficulty in large-scale preparation

Method used

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  • Graphite phase carbon nitride catalyst preparation method

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preparation example Construction

[0020] The embodiment of the present invention provides a preparation method of graphite phase carbon nitride, which comprises the following steps:

[0021] (1) Add the precursor and biomass into water according to a certain ratio, stir magnetically, and heat to 80°C until the water evaporates to dryness to obtain a mixture.

[0022] (2) Put the mixture obtained in step (1) into a quartz crucible, seal it with aluminum foil, heat it to 500°C-600°C under a nitrogen atmosphere, and continue the reaction for 2-24h to obtain a graphite phase carbon nitride catalyst.

[0023] In the present invention, the biomass material has elements such as C, N, and H, and can be better combined with the precursor to increase the nitrogen content on the surface of the carbon nitride, and at the same time, it is easy to remove after calcination without affecting the crystal structure of the catalyst.

[0024] Specifically, the biomass refers to: directly derived from organisms or extracts from or...

Embodiment 1

[0038] Preparation of graphitic carbon nitride catalyst:

[0039] (1) Weigh 10g of urea and 0.006g of chitin into a 250mL beaker, add 100mL of water, ultrasonicate for 60min, and heat to 80°C with magnetic stirring until the water is evaporated to dryness to obtain a mixture.

[0040] (2) Put the mixture obtained in step (1) into a quartz crucible, seal it with aluminum foil, heat it to 550°C at a heating rate of 10°C / min under a nitrogen atmosphere, and continue the reaction for 2h to obtain a light yellow graphite phase carbon nitride catalyst .

Embodiment 2

[0042] Preparation of graphitic carbon nitride catalyst:

[0043] (1) Weigh 10g of urea and 0.006g of lignin into a 250mL beaker, add 100mL of water, ultrasonicate for 60min, heat to 80°C with magnetic stirring, until the water is evaporated to dryness, to obtain a mixture.

[0044] (2) Put the mixture obtained in step (1) into a quartz crucible, seal it with aluminum foil, heat it to 550°C at a heating rate of 10°C / min under a nitrogen atmosphere, and continue the reaction for 2h to obtain a yellow graphite phase carbon nitride catalyst.

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Abstract

The invention relates to a biomass reinforced graphite phase carbon nitride catalyst preparation method, which comprises: 1) adding a precursor and biomass into water according to a certain ratio, magnetically stirring, and heating to 80 DEG C until moisture is evaporated to achieve a dry state to obtain a mixture; and (2) putting the mixture obtained in the step (1) into a quartz crucible, sealing with aluminum-foil paper, heating to 500-800 DEG C in a nitrogen atmosphere, and continuously reacting for 2-24 h to obtain the graphite-phase carbon nitride catalyst. According to the invention, the graphite phase carbon nitride catalyst is prepared by using the environmentally-friendly and cheap renewable biomass raw material, so that the disadvantages that the performance of the graphite-phase carbon nitride is improved through precious metal deposition, semiconductor compounding and ion doping, the cost is high, the reparation process is complex, large-scale preparation is difficult andthe like are overcome; and with the application of the graphite-phase carbon nitride in photocatalytic degradation of organic pollutants, the problems of low degradation rate, low degradation speed and the like are solved, and the defects of high cost and complex process in the traditional catalyst improvement method are overcome.

Description

technical field [0001] The invention belongs to the field of chemical catalysis, and in particular relates to a preparation method of a graphite-phase carbon nitride catalyst. Background technique [0002] Graphite carbon nitride (g-C 3 N 4 ) is a semiconductor photocatalyst with visible light response, which is prepared by thermal polymerization of precursors (urea, melamine, dicyandiamide, etc.), wherein C and N atoms are represented by sp 2 Hybridization forms a highly delocalized π-conjugated system, which has good physical and chemical stability and energy band structure, and has broad application prospects in the fields of photocatalytic degradation of organic pollutants, photolysis of water to produce hydrogen, and photoreduction of carbon dioxide. [0003] At present, graphitic carbon nitride (g-C 3 N 4 ) The main preparation methods include high temperature and high pressure solid phase method, vapor phase deposition method, solvothermal method, high temperature...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24A62D3/17A62D101/20
CPCB01J27/24A62D3/17A62D2101/20B01J35/39
Inventor 孙剑贺滨冯咪赵丁伟陈欣妍张玲
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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