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Solid-phase preparation method and application of chromium-based carbon nitride catalyst

A technology for chromium-based carbon nitride and carbon-based nitride, which is applied in the field of solid-phase preparation of chromium-based carbon nitride catalysts, can solve problems such as limitation and unfavorable gas adsorption, and achieve the effects of simple operation and easy availability of raw materials

Inactive Publication Date: 2020-05-22
JIANGSU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the structure of carbon nitride itself is not conducive to the adsorption of gases. If it is not modified to a certain extent, its application in the field of catalytic oxidation of nitrogen monoxide will be greatly limited.

Method used

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  • Solid-phase preparation method and application of chromium-based carbon nitride catalyst
  • Solid-phase preparation method and application of chromium-based carbon nitride catalyst
  • Solid-phase preparation method and application of chromium-based carbon nitride catalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1, the preparation of chromium-based carbon nitride catalyst a

[0021] Step 1: Add 3.3062 g of melamine, 0.0203 g of chromium trioxide and 5.0654 g of ammonium chloride into 5 mL of ethanol solution, and grind;

[0022] Step 2: Take out the sample that has been ground in step 1, place it in a muffle furnace for calcination (calcination conditions: heat up to 520°C at a rate of 2.4°C / min, and keep it warm for 4 h), take out the sample obtained by calcination to obtain the final The product chromium-based catalyst is denoted as catalyst a.

Embodiment 2

[0023] Embodiment 2, the preparation of chromium-based carbon nitride catalyst b

[0024] Step 1: Add 3.3163 g of melamine, 0.0507 g of chromium trioxide and 5.0562 g of ammonium chloride into 5 mL of ethanol solution and grind;

[0025] Step 2: Take out the sample that has been ground in step 1, place it in a muffle furnace for calcination (calcination conditions: heat up to 520°C at a rate of 2.4°C / min, and keep it warm for 4 h), take out the sample obtained by calcination to obtain the final The product chromium-based catalyst is denoted as catalyst b.

Embodiment 3

[0026] Embodiment 3, the preparation of chromium-based carbon nitride catalyst c

[0027] Step 1: Add 3.3361 g of melamine, 0.0824 g of chromium trioxide and 5.0323 g of ammonium chloride into 5 mL of ethanol solution and grind;

[0028] Step 2: Take out the sample that has been ground in step 1, place it in a muffle furnace for calcination (calcination conditions: heat up to 520°C at a rate of 2.4°C / min, and keep it warm for 4 h), take out the sample obtained by calcination to obtain the final The product chromium-based catalyst is denoted as catalyst c.

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Abstract

The invention discloses a solid-phase preparation method and application of a chromium-based carbon nitride catalyst. The preparation method comprises the following steps: adding melamine, chromium sesquioxide and ammonium chloride into an ethanol solution, and carrying out grinding and calcining successively to obtain a final product, namely the chromium-based carbon nitride catalyst. The methodis simple to operate; raw materials are easy to obtain; and the original bulk phase structure of melamine is changed by the solid-phase synthesis method, so the obtained final product is in a porous sheet shape. The porous flaky chromium-based carbon nitride catalyst is beneficial for dispersion of the active component chromium on the surface of the catalyst and adsorption of gas. At a temperatureof 300 DEG C, the removal rate of NO catalyzed and oxidized by the chromium-based carbon nitride catalyst can reach 80%.

Description

technical field [0001] The invention relates to the technical field of environmental functional materials, in particular to a solid-phase preparation method and application of a chromium-based carbon nitride catalyst. Background technique [0002] In recent years, with the rapid development of society, the ensuing environmental problems have gradually become a problem that affects the sustainable development of all mankind that human beings have to face up to in today's society. Among them, acid rain, ozone depletion, photochemical smog and greenhouse effect are some of the more prominent problems, while nitrogen oxides NOx is one of the main pollutants causing such problems, which has seriously threatened the living environment and health of human beings. . At present, countries around the world are restricting the emission of nitrogen oxides (NOx) more and more stringently. The "Government Work Report" issued in 2019 clarified the overall goal of reducing nitrogen oxides ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01D53/86B01D53/56
CPCB01J27/24B01D53/8628B01D2258/0283
Inventor 仲蕾应梦凡罗润孙建华周萍
Owner JIANGSU UNIV OF TECH
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