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A kind of modified graphite phase carbon nitride and its preparation method and application

A graphite phase carbon nitride and modification technology, applied in chemical instruments and methods, separation methods, nitrogen compounds, etc., can solve the problems of COS catalytic hydrolysis inactivity, catalytic activity, poor stability, specific surface area, low pore volume, etc. , to achieve the effect of increasing reactive sites, good performance and high specific surface area

Active Publication Date: 2019-12-31
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Therefore, the technical problem to be solved in the present invention is to overcome the cumbersome preparation process of graphite phase carbon nitride in the prior art, expensive raw materials, low specific surface area and pore volume. 2 In the S selective oxidation reaction, the catalytic activity and stability are poor, and there is no activity for the catalytic hydrolysis of COS, so as to provide a preparation method and application of a copolymerized modified graphite phase carbon nitride

Method used

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  • A kind of modified graphite phase carbon nitride and its preparation method and application
  • A kind of modified graphite phase carbon nitride and its preparation method and application
  • A kind of modified graphite phase carbon nitride and its preparation method and application

Examples

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Embodiment 1

[0041] Dissolve 10g of urea and 15mg of tetrabromobisphenol A in 100mL of water, stir and evaporate to dryness at 60°C. The evaporated sample was ground into a powder with a particle size of 250 mesh, placed in a heating device, and heated to 600°C at a rate of 5°C / min under a nitrogen atmosphere, and thermally polymerized for 2 hours. After natural cooling to room temperature, the synthesized samples were collected to obtain graphitic carbon nitride with nano-layered structure, which was named CNU-Br 0.015 .

Embodiment 2

[0043] Dissolve 10 g of urea and 25 mg of tetrabromobisphenol A in 100 mL of water, stir and evaporate to dryness at 90°C. The evaporated sample was ground into a powder with a particle size of 300 mesh, placed in a heating device, and heated to 500°C at a rate of 5°C / min under a nitrogen atmosphere, and thermally polymerized for 2 hours. After natural cooling to room temperature, the synthesized samples were collected to obtain graphitic carbon nitride with nano-layered structure, which was named CNU-Br 0.025 .

Embodiment 3

[0045] Dissolve 10g of urea and 50mg of tetrabromobisphenol A in 100mL of water, stir and evaporate to dryness at 80°C. The evaporated sample was ground into a powder with a particle size of 250 mesh, placed in a heating device, and heated to 550°C at a rate of 5°C / min under a nitrogen atmosphere, and thermally polymerized for 2 hours. After natural cooling to room temperature, the synthesized samples were collected to obtain graphitic carbon nitride with nano-layered structure, which was named CNU-Br 0.05 .

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Abstract

The invention belongs to the technical field of material preparation and environmental catalysis, and specifically relates to a modified graphite phase carbon nitride and its preparation method and application. The modified graphite phase carbon nitride is prepared by copolymerization of urea and tetrabromobisphenol A obtained, wherein the content of bromine in the modified graphite phase carbon nitride is 0.1-0.5 wt%, and the modified graphite phase carbon nitride has a nano-layered structure. The modified graphitic carbon nitride provided by the present invention is applied in the desulfurization reaction. 2 In the S-selective reaction, the material showed good catalytic activity and selectivity, and also had certain activity for COS catalytic hydrolysis.

Description

technical field [0001] The invention belongs to the technical field of material preparation and environmental catalysis, and in particular relates to a modified graphite phase carbon nitride and its preparation method and application. Background technique [0002] Sulfur-containing gases such as hydrogen sulfide and carbonyl sulfide are generally produced in the chemical production process of petroleum, natural gas and coal as raw materials. It will not only pollute the ecological environment, but also endanger human health. H 2 The most commonly used technology for S is the Claus sulfur recovery process, which can remove both H 2 S can also realize the resource utilization of sulfur element. However, due to the thermodynamic limitation of the Claus reaction, the Claus tail gas still contains 3-5% H 2 S failed to be converted into elemental sulfur, in addition, the process requires H 2 S is enriched and desorbed, the process route is long and the investment in equipment...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B21/082B01D53/86B01D53/52B01D53/48B01J27/24B01J35/10
CPCB01D53/8606B01D53/8612C01B21/0605B01J27/24C01P2002/72C01P2002/85C01P2002/86C01P2002/82C01P2004/04C01P2004/03C01P2006/12C01P2006/16C01P2006/14B01J35/613B01J35/633B01J35/647B01J35/615
Inventor 江莉龙沈丽娟雷淦昌曹彦宁王心晨
Owner FUZHOU UNIV
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