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Preparation method and application of porous g-C3N4 material

A g-c3n4, porous graphite technology, applied in chemical instruments and methods, hydrogen production, inorganic chemistry and other directions, can solve problems such as unfavorable large-scale industrial production, limit preparation efficiency, etc., achieve short synthesis time, improve preparation efficiency, The effect of high photocatalytic performance

Inactive Publication Date: 2019-03-29
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The thermal polymerization method is currently commonly used to synthesize g-C 3 N 4 method, traditional thermal polymerization to prepare g-C 3 N 4 The best method is to use a muffle furnace to heat at a high temperature for several hours or even longer, which greatly limits the g-C 3 N 4 The preparation efficiency is not conducive to large-scale industrial production

Method used

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  • Preparation method and application of porous g-C3N4 material
  • Preparation method and application of porous g-C3N4 material
  • Preparation method and application of porous g-C3N4 material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Weigh 2g of dicyandiamide solid and 1g of urea, and mix them evenly. Grind well to a powder with a mortar and place in a small alumina crucible and seal it with a lid. Put the sealed crucible into a large alumina crucible, evenly cover it with 310g of copper oxide powder, put it in a microwave oven, set the firepower to high fire, heat it in the microwave for 35min, then cool it down to room temperature naturally to obtain a brownish-yellow solid.

[0025] (2) Grind the microwaved solid into powder with a mortar, then put it into a beaker, add 100 ml of deionized water, and process it ultrasonically for 1 hour. The sonicated samples were centrifuged at high speed to remove unreacted precursors and retain g-C 3 N 4 solid. Repeat water washing and centrifugation three times, then put the solid into a watch glass, and heat in a vacuum oven to remove the moisture in the solid. After drying, the samples were ground into powder for future use.

[0026] (3) For the pr...

Embodiment 2

[0028] (1) Weigh 1g of dicyandiamide solid and 2g of urea, and mix them evenly. Grind well to a powder with a mortar and place in a small alumina crucible and seal it with a lid. Put the sealed crucible into a large alumina crucible, cover it evenly with 310g of copper oxide powder, put it in a microwave oven, set the firepower to high fire, heat it in microwave for 35min, then cool it down to room temperature naturally to obtain a brownish-yellow solid.

[0029] (2) Grind the microwaved solid into powder with a mortar, then put it into a beaker, add 100 ml of deionized water, and process it ultrasonically for 1 hour. The sonicated samples were centrifuged at high speed to remove unreacted precursors and retain g-C 3 N 4 solid. Repeat water washing and centrifugation three times, then put the solid into a watch glass, and heat in a vacuum oven to remove the moisture in the solid. After drying, the samples were ground into powder for future use.

[0030] (3) For the prepar...

Embodiment 3

[0035](1) Weigh 1g of dicyandiamide solid and 2g of urea, and mix them evenly. Grind well to a powder with a mortar and place in a small alumina crucible and seal it with a lid. Put the sealed crucible into a large alumina crucible, evenly cover it with 330g of copper oxide powder, put it in a microwave oven, set the firepower to high fire, heat it in microwave for 20min, and cool it down to room temperature naturally to obtain a brownish-yellow solid.

[0036] (2) Grind the microwaved solid into powder with a mortar, then put it into a beaker, add 100 ml of deionized water, and process it ultrasonically for 1 hour. The sonicated samples were centrifuged at high speed to remove unreacted precursors and retain g-C 3 N 4 solid. Repeat water washing and centrifugation three times, then put the solid into a watch glass, and heat in a vacuum oven to remove the moisture in the solid. After drying, the samples were ground into powder for future use.

[0037] (3) For the prepared...

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Abstract

The invention provides a preparation method and application of a porous g-C3N4 material, and belongs to the field of photocatalysis material preparation. According to the preparation method, dicyandiamide which has wide sources and can be easily obtained is used as raw materials; urea is used as a template; a microwave heating method is used for preparing a porous graphite phase g-C3N4 material. The prepared porous graphite phase g-C3N4 material has high stability, and can be applied to the field of photocatalysis; the water photocatalysis hydrogen production is efficiently performed; meanwhile, organic contaminants can be effectively degraded through photocatalysis. The problems of time waste and labor waste of a conventional high-temperature heating method are solved. The preparation efficiency is improved; meanwhile, few types of raw materials are required, the price is low, the production cost is reduced, and the method is applicable to industrial large-scale production.

Description

technical field [0001] The invention belongs to the field of photocatalytic material preparation and relates to a porous graphite phase g-C 3 N 4 The preparation method of the material, the preparation and its application in the field of photocatalysis. Background technique [0002] Solar energy, as one of the green, clean and sustainable energy sources, provides about 120,000 TW of energy to the earth every year and attracts worldwide attention. Since the discovery that titanium dioxide can split water into hydrogen and oxygen using ultraviolet light, photocatalytic technology has been considered as one of the important strategies to solve global energy and environmental problems. However, due to the fact that titanium dioxide can only absorb ultraviolet light and has a high recombination rate of carriers, solar energy cannot be used efficiently, resulting in low photocatalytic efficiency, which limits its application in energy regeneration and environmental governance. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C01B3/04C02F1/30C02F101/34C02F101/38
CPCC01B3/042C02F1/30B01J27/24C01B2203/1041C01B2203/0277C02F2305/10C02F2101/34C02F2101/38C02F2101/308B01J35/39Y02E60/36
Inventor 郝策杨娅楠商文喆李光兰
Owner DALIAN UNIV OF TECH
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