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Preparation method and application of carbon nitride supported chromium monoatom Fenton catalyst

A technology of carbon nitride and catalyst, which is applied in the field of preparation of carbon nitride-supported chromium single-atom Fenton catalyst, can solve the problems of high recombination rate limiting practical application, etc., and achieve high yield, mild reaction conditions, and cheap and easy-to-obtain raw materials Effect

Inactive Publication Date: 2019-07-05
ZHEJIANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high recombination rate of photoinduced electron-hole pairs limits its practical applications

Method used

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  • Preparation method and application of carbon nitride supported chromium monoatom Fenton catalyst
  • Preparation method and application of carbon nitride supported chromium monoatom Fenton catalyst
  • Preparation method and application of carbon nitride supported chromium monoatom Fenton catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Step S1: Put substance A in a conical flask with a lid and ultrasonically mix it evenly and keep stirring for 4 hours. The obtained solid is washed and dried in vacuum at 60°C overnight, and then ground into powder to obtain g-C 3 N 4 A polymer, said substance A consisting of xanthine, melamine and cyanuric acid;

[0022] Step S2: Dissolving chromium nitrate in water and ultrasonically dispersing to obtain a chromium nitrate solution, and then adding the chromium nitrate solution to the g-C obtained in step S1 3 N 4 In the polymer, stir and mix evenly, filter and vacuum dry at 60°C for 12 hours, grind the product into powder, and then heat the obtained powder to 550°C for 2 hours under inert gas at a heating rate of 5°C / min to obtain the target product nitrogen Carbon nitride-supported chromium single-atom Fenton catalyst (SA-Cr / g-C3N4), based on theoretical calculations, the mass fraction of chromium atoms in the carbon nitride-supported chromium single-atom Fenton c...

Embodiment 2

[0026]Step S1: Put substance A in a conical flask with a lid and mix it homogeneously by ultrasonic and keep stirring for 6h. The obtained solid is washed and dried in vacuum at 60°C overnight, and then ground into powder to obtain g-C 3 N 4 A polymer, said substance A consisting of xanthine, melamine and cyanuric acid;

[0027] Step S2: Dissolving chromium nitrate in water and ultrasonically dispersing to obtain a chromium nitrate solution, and then adding the chromium nitrate solution to the g-C obtained in step S1 3 N 4 In the polymer, stir and mix evenly, filter and vacuum dry at 60°C for 12 hours, grind the product into powder, and then heat the obtained powder to 550°C for 2 hours under inert gas at a heating rate of 5°C / min to obtain the target product nitrogen Carbon nitride-supported chromium single-atom Fenton catalyst, based on theoretical calculations, the mass fraction of chromium atoms in the carbon nitride-supported chromium single-atom Fenton catalyst is 4%. ...

Embodiment 3

[0029] Step S1: Put substance A in a conical flask with a lid and ultrasonically mix it evenly and keep stirring for 4 hours. The obtained solid is washed and dried in vacuum at 60°C overnight, and then ground into powder to obtain g-C 3 N 4 A polymer, said substance A consisting of xanthine, melamine and cyanuric acid;

[0030] Step S2: Dissolving chromium nitrate in water and ultrasonically dispersing to obtain a chromium nitrate solution, and then adding the chromium nitrate solution to the g-C obtained in step S1 3 N 4 In the polymer, stir and mix evenly, filter and vacuum dry at 100°C for 12 hours, grind the product into powder, and then heat the obtained powder to 550°C at a heating rate of 5°C / min and calcinate for 2 hours under inert gas to obtain the target product nitrogen Carbon nitride-supported chromium single-atom Fenton catalyst, based on theoretical calculations, the mass fraction of chromium atoms in the carbon nitride-supported chromium single-atom Fenton c...

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Abstract

The invention discloses a preparation method and application of a carbon nitride supported chromium monoatom Fenton catalyst, and belongs to the technical field of Fenton catalysts. The technical solution key point is that the carbon nitride supported chromium monoatom Fenton catalyst comprises a heterogeneous solid carbon nitride carrier and an active component metal chromium monoatom supported on the carbon nitride carrier, the catalyst has a porous sheet-like structure, and the chromium monoatoms are uniformly anchored on SA-Cr / g-C3N4. The invention also specifically discloses the preparation method of the carbon nitride supported chromium monoatom Fenton catalyst and the application of the catalyst in catalytic degradation of dye wastewater. According to the method provided by the invention, raw materials required in the preparation process of the catalyst are cheap and easy to obtain, and the catalyst has a high yield, and is suitable for large-scale industrial production; and when the catalyst is used for catalytic degradation of the dye wastewater, the selectivity is 100%, the reaction conditions are mild, the catalyst can be simply washed and recovered for recycling, and the catalyst still maintains better catalytic activity.

Description

technical field [0001] The invention belongs to the technical field of Fenton catalysts, and in particular relates to a preparation method and application of a carbon nitride-supported chromium single-atom Fenton catalyst. Background technique [0002] Advanced Oxidation Process (AOP) treatment processes based on the generation of strong oxidative and highly reactive species such as hydroxyl radicals and / or sulfate radicals have proven to be promising alternatives to conventional treatment processes for the treatment of organic pollutants in wastewater , hydrogen peroxide is efficient, safe, and convenient, so that hydrogen peroxide is widely used in pollutant control. However, its catalytic reaction rate with most organic substances is too slow, so it is not an effective oxidant for most organic substances. Therefore, peroxide Hydrogen is often used in combination with UV light, iron salts, or ozone to generate hydroxyl radicals that react with most organics at diffusion-co...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J37/34B01J37/08C02F1/72C02F101/30C02F101/34C02F101/38
CPCB01J27/24B01J37/082B01J37/343C02F1/722C02F1/725C02F2101/308C02F2101/34C02F2101/38C02F2305/026
Inventor 吴西林陈枫高俞贝林温馨陈建荣王方园
Owner ZHEJIANG NORMAL UNIVERSITY
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