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Preparation method of porous g-C3N4 (graphite-phase carbon nitride) nanosheet powder

A technology of carbon nitride and porous graphite, which is applied in the field of photocatalytic material preparation, can solve the problems of high cost and complicated preparation process, and achieve the effect of complete single layer, wide source of raw materials and uniform distribution of pores

Active Publication Date: 2018-07-24
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method of porous graphite phase carbon nitride nanosheet powder, which solves the problem of existing porous g-C 3 N 4 The preparation process is complicated and the cost is high

Method used

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  • Preparation method of porous g-C3N4 (graphite-phase carbon nitride) nanosheet powder
  • Preparation method of porous g-C3N4 (graphite-phase carbon nitride) nanosheet powder

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Step 1, according to the mass ratio of melamine and deionized water is 1:10, and the mass ratio of Coca-Cola and deionized water is 1:600, add melamine, Coca-Cola, and deionized water to the clean polytetrafluoroethylene lining and mix, Stir evenly; put the above-mentioned polytetrafluoroethylene lining into the corresponding stainless steel jacket, tighten it, put it in an oven, keep it warm at 200°C for 12h, and after cooling with the furnace, wash the obtained solid-liquid mixture with deionized water and anhydrous The modified melamine precursor was obtained by centrifuging and washing with ethanol three times, and finally drying in an oven at 50°C for 24 hours.

[0033] Step 2. Put the precursor obtained in step 1 into an alumina crucible and cover it; heat preservation at 550°C for 4 hours, and calcining at a heating rate of 0.1°C / min to obtain porous g-C 3 N 4 powder.

[0034] The g-C that embodiment 1 obtains 3 N 4 Powder TEM photos as figure 1 As shown, it...

Embodiment 2

[0036]Step 1, according to the mass ratio of melamine to deionized water is 1:50, and the mass ratio of Fanta to deionized water is 1:300, add melamine, Fanta, and deionized water into the clean PTFE lining Mix and stir evenly; put the above-mentioned polytetrafluoroethylene lining into the corresponding stainless steel jacket, tighten it, put it in an oven, keep it warm at 180°C for 24h, and after cooling with the oven, mix the obtained solid-liquid mixture with deionized water and The modified melamine precursor was obtained by centrifuging and washing with absolute ethanol for 4 times, and finally drying in an oven at 60°C for 20 hours.

[0037] Step 2, put the precursor obtained in step 1 into an alumina crucible and cover it; heat preservation at 530°C for 5 hours, and calcine at a heating rate of 2°C / min to obtain porous g-C 3 N 4 powder.

[0038] The g-C that embodiment 2 obtains 3 N 4 Powder TEM photographs, such as figure 2 As shown, it can be seen that it is an...

Embodiment 3

[0040] Step 1, according to the mass ratio of dicyandiamide and deionized water is 1:1, the mass ratio of Pepsi and deionized water is 1:1, add dicyandiamide, Pepsi, deionized water to clean polytetrafluoroethylene ethylene liner, and stir evenly; put the above polytetrafluoroethylene liner into the corresponding stainless steel jacket, tighten it, put it in an oven, keep it at 160°C for 55h, and cool it with the furnace, and use Deionized water and absolute ethanol were centrifuged and washed five times, and finally dried in an oven at 70°C for 18 hours to obtain the modified dicyandiamide precursor.

[0041] Step 2, put the precursor obtained in step 1 into an alumina crucible and cover it; heat preservation at 500°C for 6 hours, and calcine at a heating rate of 5°C / min to obtain porous g-C 3 N 4 powder.

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Abstract

The invention discloses a preparation method of a porous g-C3N4 (graphite-phase carbon nitride) nanosheet powder. The preparation method comprises the following steps of using a carbon and nitrogen precursor, carbonate beverage and water as the raw materials; using the carbonate beverage to assist the hydrothermal treatment on the conventional carbon and nitrogen precursor, so as to prepare a modified precursor; calcining the modified precursor at high temperature, so as to obtain the porous g-C3N4 nanosheet powder. The preparation method has the advantages that the carbon and nitrogen precursor is modified by the conventional carbonate beverage assisting the hydrothermal treatment, so as to obtain the porous g-C3N4 powder which is of a nanosheet structure; the procedure is simple, the sources of the raw materials are wide, the cost is low, the experiment operability is strong, and the special requirement on equipment is avoided; the preparation method is suitable for large-scale industrialized production; the prepared porous g-C3N4 nanosheet powder is of an obvious porous two-dimensional structure, the single layers are complete, the porosity is uniformly distributed, and the structure defects of no pore and easiness in agglomeration in the traditional-phase g-C3N4 are relieved; the good photocatalysis property is realized.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic material preparation, and in particular relates to a preparation method of porous graphite phase carbon nitride nanosheet powder. Background technique [0002] Graphite carbon nitride (g-C 3 N 4 ), as a two-dimensional semiconductor material with a graphene-like structure, has shown great application potential in the fields of photolysis of water to produce hydrogen, photodegradation of organic pollutants and photoreduction of carbon dioxide. Regular bulk g-C 3 N 4 Although it has certain photocatalytic properties, its application in the field of photocatalysis is severely restricted due to its defects in energy band structure, small specific surface area, easy agglomeration, and irregular morphology. [0003] Existing literature has shown that both "doping" and "morphology control" can effectively improve the physical and chemical properties of a single material, thereby obtaining effi...

Claims

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Application Information

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IPC IPC(8): C01B21/082B01J27/24
CPCB82Y30/00B82Y40/00C01B21/0605B01J27/24C01P2004/20B01J35/39
Inventor 孙少东梁淑华苟旭峰崔杰杨卿
Owner XIAN UNIV OF TECH
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