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Preparation method of graphite type C3N4 material, graphite type C3N4 material and application of graphite type C3N4 material

A C3N4, graphite-based technology, applied in chemical instruments and methods, water/sludge/sewage treatment, chemical/physical processes, etc., can solve the problems of unfavorable industrial production, cumbersome preparation process, and high cost of raw materials, and achieve fewer types of raw materials , simple process, high photocatalytic activity

Inactive Publication Date: 2016-11-23
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditionally prepared C 3 N 4 The specific surface area of ​​the material is small, and the quantum efficiency is low, resulting in low photocatalytic activity.
There have been reports in the literature of new synthetic C 3 N 4 The method of the material improves its shortcomings such as small specific surface area and low photocatalytic activity, but the cost of raw materials required is high, and the preparation process is cumbersome, which is not conducive to large-scale industrial production

Method used

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  • Preparation method of graphite type C3N4 material, graphite type C3N4 material and application of graphite type C3N4 material
  • Preparation method of graphite type C3N4 material, graphite type C3N4 material and application of graphite type C3N4 material
  • Preparation method of graphite type C3N4 material, graphite type C3N4 material and application of graphite type C3N4 material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A kind of graphite type C of the present invention 3 N 4 The preparation method of material comprises the following steps:

[0031] Weigh 6 parts of urea, 10g each, place them in 100mL crucibles, cover the lids, and then wrap them tightly with tinfoil; place the above samples in the middle of the muffle furnace for calcination. Calcination is specifically as follows: according to the heating rate of 3°C / min, 4°C / min, 5°C / min, 6°C / min, 7°C / min, and 8°C / min, the urea is heated from room temperature to 600°C, and then The temperature was kept at 600°C for constant temperature calcination for 4h. After cooling in the air, grind the sample in a mortar for 5 minutes, and the resulting bright yellow powder is graphite type C 3 N 4 Material. In this example, the graphite-type C 3 N 4 The materials are numbered A1, A2, A3, A4, A5, and A6 respectively, and their specific surface area test results are shown in Table 1.

[0032] figure 1 Graphite type C prepared for this e...

Embodiment 2

[0039] A kind of graphite type C of the present invention 3 N 4 The preparation method of material comprises the following steps:

[0040] Weigh 3 parts of urea, 10g each, and place them in 100mL crucibles, cover the lid, and then wrap it tightly with tinfoil; place the above sample in the middle of the muffle furnace for calcination. Specifically, the calcination is to heat the urea from room temperature to 600°C at a heating rate of 5°C / min, and then keep the temperature at 600°C for constant temperature calcination, and the constant temperature calcination time is 2h, 3h, and 4h respectively. After cooling in the air, grind the sample in a mortar for 5 minutes, and the resulting bright yellow powder is graphite type C 3 N 4 Material. In this example, the graphite type C prepared when the constant temperature calcination time is 2h, 3h, 4h 3 N 4 The materials are numbered B1, B2, and B3 respectively, and their specific surface area test results are shown in Table 2.

...

Embodiment 3

[0045] A kind of graphite type C of the present invention 3 N 4 The application of materials in the treatment of landfill leachate includes the following steps:

[0046] Add the graphite type C that embodiment 1 makes in landfill leachate 3 N 4 Material A3 was ultrasonically dispersed at a frequency of 10KHz for 3 minutes, and the resulting mixture was degraded by shaking at a speed of 150r / min for 48 hours under a light intensity of 15Lux to complete the degradation of landfill leachate. In the present embodiment, graphite type C is added in every 100mL of landfill leachate 3 N 4 The materials are 0.01g, 0.02g, 0.03g, 0.04g, 0.05g respectively, and the initial total organic carbon concentration in landfill leachate is 100mg / L.

[0047] Figure 4 For different graphite type C 3 N 4 Effect diagram of material addition on landfill leachate degradation. Such as Figure 4 Shown, the graphite type C prepared by the present invention 3 N 4 For landfill leachate with an i...

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Abstract

The invention discloses a preparation method of a graphite type C3N4 material, the graphite type C3N4 material and an application of the graphite type C3N4 material. The preparation method comprises steps of heating calcination and constant-temperature calcination. The preparation method is used for rapidly preparing the graphite type C3N4 material, a small variety of raw materials are required, the cost is low, the process is simple, the production cost is effectively reduced, and accordingly, the preparation method is suitable for industrial large-scale production and has great actual application value. The specific surface area of the graphite type C3N4 material prepared with the method is 30.1 m<2> / g-68.7 m<2> / g, and the graphite type C3N4 material has the advantages of large specific surface area, high photocatalytic activity and the like, can be used for photocatalytic degradation of landfill leachate and can efficiently degrade organic pollutants in the landfill leachate.

Description

technical field [0001] The invention belongs to the technical field of preparation of environmentally friendly new materials, and relates to a graphite type C 3 N 4 Preparation method of material, graphite type C 3 N 4 Materials and applications thereof, in particular to a graphite type C 3 N 4 Application of materials in the treatment of landfill leachate. Background technique [0002] In recent years, the problem of environmental pollution has become increasingly prominent, and environmental photocatalysis technology is considered to be a low-cost, environment-friendly environmental treatment technology. At present, the design and development of high-performance and harmless photocatalytic materials has become the development direction of environmental photocatalytic technology and has been widely concerned. [0003] C 3 N 4 It is a non-metallic polymer semiconductor with a graphite structure. Due to its unique optical properties, high stability, easy preparation a...

Claims

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Application Information

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IPC IPC(8): C01B21/082C02F1/30B01J27/24
CPCC01B21/0605C02F1/30B01J27/24C02F2103/06C02F2101/30C02F2305/10C01P2006/12C01P2004/04C01P2004/03C01P2002/72B01J35/613B01J35/39
Inventor 胡亮曾光明陈桂秋刘玉堂万佳王龙禄武海鹏陶唯易峰杨江丽
Owner HUNAN UNIV
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