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Method for rapidly preparing iodine-potassium co-doped carbon nitride as well as product and application thereof

A carbon nitride and co-doping technology, which is applied in chemical instruments and methods, catalyst activation/preparation, chemical/physical processes, etc., can solve the problems of low separation efficiency of photogenerated electrons and holes and large band gap. Achieve the effect of improving photocatalytic efficiency, moderate bandgap width and good effect

Active Publication Date: 2021-01-01
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the relatively large band gap for the existing preparation of carbon nitride, the shortcomings of the low separation efficiency of photogenerated electrons and holes, the purpose of the present invention is to provide a rapid preparation of iodine Potassium co-doped carbon nitride method

Method used

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  • Method for rapidly preparing iodine-potassium co-doped carbon nitride as well as product and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A kind of potassium iodide co-doped carbon nitride, prepared rapidly according to the following steps:

[0020] 1) Weigh melamine, potassium iodide and deionized water according to the mass ratio of melamine, potassium iodide and deionized water as 1:1:100, add melamine and potassium iodide into deionized water, stir at 80°C to evaporate to dryness into a solid;

[0021] 2) Put the solid obtained above into a ceramic crucible after being ground and pulverized, and then heat it in a muffle furnace to 550°C for 3 hours with heat preservation and roasting at a heating rate of 3°C / min, then cool naturally to obtain a brown solid;

[0022] 3) Add the brown solid obtained above into a ball mill tank, add elemental iodine and deionized water according to the mass ratio of the brown solid to iodine element and deionized water at 1:0.2:50, and put it in a planetary ball mill at 200 r / min Grinding at a rotating speed for 36 hours, then filtering, washing and drying to obtain pota...

Embodiment 2

[0025] A kind of potassium iodide co-doped carbon nitride, same as the steps of Example 1, prepared rapidly according to the following steps:

[0026] 1) Weigh melamine, potassium iodide and deionized water according to the mass ratio of melamine, potassium iodide and deionized water as 1:0.3:50, add melamine and potassium iodide into deionized water, stir at 90°C to evaporate to dryness into a solid;

[0027] 2) Put the solid obtained above into a ceramic crucible after being ground and pulverized, and then heat it in a muffle furnace to 500°C for 5 hours with heat preservation and roasting at a heating rate of 5°C / min, and then cool it naturally. The obtained brown solid is potassium and a small amount of Carbon nitride doped with iodine;

[0028] 3) Add the brown solid obtained above into a ball mill tank, add elemental iodine and deionized water according to the mass ratio of the brown solid to iodine element and deionized water at 1:0.5:100, and put it in a planetary ball...

Embodiment 3

[0031] A kind of potassium iodide co-doped carbon nitride, same as the steps of Example 1, prepared rapidly according to the following steps:

[0032] 1) Weigh melamine, potassium iodide and deionized water according to the mass ratio of melamine, potassium iodide and deionized water as 1:0.5:80, add melamine and potassium iodide into deionized water, stir at 100°C to evaporate to dryness into a solid;

[0033] 2) Grind and pulverize the solid obtained above and put it into a ceramic crucible, then heat it in a muffle furnace to 600°C for 5 hours, heat preservation and roasting at a rate of 10°C / min, and then cool it naturally. The obtained brown solid is potassium and a small amount of Carbon nitride doped with iodine;

[0034] 3) Add the brown solid obtained above into a ball mill tank, add elemental iodine and deionized water according to the mass ratio of the brown solid to iodine element and deionized water at 1:0.3:80, and put it in a planetary ball mill at 100 r / min Gr...

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Abstract

The invention relates to a method for rapidly preparing iodine-potassium co-doped carbon nitride as well as a product and an application of the iodine-potassium co-doped carbon nitride. The method comprises the following steps: accurately weighing melamine, potassium iodide and a deionized water solvent, adding melamine and potassium iodide into deionized water, and performing stirring and evaporating to dryness at a certain temperature; grinding and crushing the product, putting the processed product into a crucible with a cover, performing roasting in a muffle furnace, and naturally performing cooling; and adding the roasted product and elemental iodine into deionized water, performing grinding in a planetary ball mill for a period of time, performing filtering, washing and drying to obtain the iodine-potassium co-doped carbon nitride. The iodine-potassium co-doped carbon nitride obtained by the preparation method provided by the invention has the advantages of moderate energy gap, high separation efficiency of photo-induced electrons and holes, good methylene blue photocatalytic degradation effect, simple operation, few steps, easily available raw materials and low cost, and issuitable for large-scale production.

Description

technical field [0001] The invention belongs to the field of nanomaterial preparation, and in particular relates to a method for rapidly preparing potassium iodide co-doped carbon nitride and its product and application. Background technique [0002] Photocatalytic technology is a new technology developed rapidly in recent years that can use solar energy for environmental purification and energy conversion. It generally has a moderate energy band gap. Under the irradiation of sunlight, its electrons can undergo transitions to form high-energy photo-generated electrons and photo-generated hole pairs. When in contact with oxygen and water in the air, redox reactions can occur to form super Active free radicals such as oxygen free radicals and hydroxyl free radicals can degrade pollutants and kill bacteria and viruses. Compared with other technologies, photocatalytic technology is safe, efficient and has no secondary pollution, and pollutants are completely oxidized and decomp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J37/08B82Y30/00B82Y40/00C02F1/30A62D3/17C02F101/30C02F101/34C02F101/36C02F101/38A62D101/20A62D101/22A62D101/26A62D101/28
CPCB01J27/24B01J37/082B01J37/0036B82Y30/00B82Y40/00C02F1/30A62D3/17C02F2101/30C02F2101/34C02F2101/36C02F2101/38C02F2101/40C02F2101/308C02F2305/10A62D2101/20A62D2101/22A62D2101/26A62D2101/28B01J35/39Y02W10/37Y02E60/36
Inventor 崔大祥徐少洪王敬锋林琳吴晓燕
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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