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Hollow tubular graphite-phase carbon nitride photocatalyst containing nitrogen defects, preparation method and applications thereof

A carbon nitride light and catalyst technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., to achieve the effect of increasing the migration rate, expanding the optical absorption range, and improving the utilization rate

Pending Publication Date: 2020-05-01
SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the shortcomings of the prior art and improve its deficiencies, the present invention provides a hollow tubular nitrogen-containing defect with properties such as photogenerated electrons and holes that can quickly migrate and separate, have a large specific surface area, and have a high utilization rate of light. Graphite phase carbon nitride photocatalyst; the present invention also provides a preparation method of a hollow tubular graphite phase carbon nitride photocatalyst with one-dimensional nitrogen-containing defects that is green, pollution-free, low in raw material cost, easy to obtain, and simple in material synthesis process; The present invention also provides the application of the above-mentioned hollow tubular graphite phase carbon nitride photocatalyst containing nitrogen defects

Method used

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  • Hollow tubular graphite-phase carbon nitride photocatalyst containing nitrogen defects, preparation method and applications thereof
  • Hollow tubular graphite-phase carbon nitride photocatalyst containing nitrogen defects, preparation method and applications thereof
  • Hollow tubular graphite-phase carbon nitride photocatalyst containing nitrogen defects, preparation method and applications thereof

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Embodiment 1

[0037] A hollow tubular graphite phase carbon nitride photocatalyst containing nitrogen defects, the preparation method of which comprises the following steps:

[0038] (1) Weigh 4.0g of melamine into 4 groups of beakers, add 60mL of deionized water respectively, ultrasonically disperse evenly, put them into a water bath and stir while performing water bath reaction, the stirring speed is controlled at 500rpm, and the temperature of the water bath is controlled at 85°C Mix around until the melamine is completely dissolved to a homogeneous solution.

[0039] (2) Quickly transfer the solution after the water bath obtained in step (1) to a 100mL autoclave liner, cover the lid, put it into the autoclave for compaction and tighten the lid of the autoclave, transfer it to the oven, and adjust the temperature to 180 ℃ and kept for 24h, after natural cooling, the obtained product was washed several times with deionized water and ethanol to neutrality, filtered (ie suction filtration),...

experiment example 1

[0050] The hollow tubular carbon nitride and carbon nitride monomers of Comparative Example 1 and Comparative Example 2 and the hollow tubular graphite phase carbon nitride photocatalyst containing nitrogen defects in Example 1 were scanned by an electron microscope.

[0051] figure 1 Be respectively the scanning electron microscope (SEM) picture of the hollow tubular carbon nitride of the present invention comparative example 1, comparative example 2, embodiment 1, carbon nitride monomer and the hollow tubular graphite phase carbon nitride photocatalyst of nitrogen defect, Where (a) is CN, (b) is TCN, and (c) is ND-TCN-10.

[0052] figure 2 It is a transmission electron microscope (TEM) picture of ND-TCN-10 in Example 1 of the present invention.

[0053] From figure 1 It can be seen that the carbon nitride monomer exhibits an obvious block structure and has a small specific surface area; the hollow tubular carbon nitride presents a hollow tubular structure, which greatly ...

experiment example 2

[0056] The hollow tubular carbon nitride, carbon nitride monomer, and hollow tubular graphite phase carbon nitride photocatalyst containing nitrogen defects in Comparative Example 1, Comparative Example 2 and Example 1 were subjected to X-ray scanning.

[0057] image 3 It is the X-ray diffraction spectrum (XRD) contrast figure of the hollow tubular carbon nitride of the present invention comparative example 1, comparative example 2, carbon nitride monomer and the hollow tubular graphite phase carbon nitride photocatalyst of nitrogen defect of embodiment 1 . It can be seen from the figure that two characteristic peaks appearing at 13.1° and 27.5° are respectively attributed to the XRD diffraction peaks of the (100) and (002) crystal planes of graphitic carbon nitride, indicating that the prepared product is indeed g-C 3 N 4 . Compared with carbon nitride monomer (CN), the two signal peaks of hollow tubular carbon nitride (TCN) are significantly weakened, but slightly higher...

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Abstract

The invention discloses a nitrogen defect-containing hollow tubular graphite phase carbon nitride photocatalyst, a preparation method and applications thereof. The preparation method comprises: carrying out a hydrothermal reaction by using melamine as a raw material, then adding KOH, and carrying out high-temperature calcination. According to the invention, the one-dimensional morphology of the catalyst is of a hollow tubular structure containing nitrogen vacancies, the diameter is 3-7 microns, and the length is 20-50 microns; the nitrogen vacancy is a defect and is introduced by adding potassium hydroxide in the calcining process; and the catalyst provided by the invention has the advantages that the photocatalytic performance is high, and the catalyst can be effectively applied to removal of antibiotics in wastewater.

Description

technical field [0001] The invention belongs to the technical field of visible light catalysis, and mainly relates to a hollow tubular graphite phase carbon nitride photocatalyst containing nitrogen defects and a preparation method and application thereof. Background technique [0002] With the rise of large-scale livestock and poultry farming and the rapid development of medical technology, tetracycline antibiotics, as drugs for the treatment of infections caused by sensitive microorganisms, have been used unrestrainedly by people, resulting in many antibiotic-based drugs causing serious damage to the water environment. pollution, which poses a threat to human health. Therefore, the treatment of antibiotic pollution in wastewater has become one of the research hotspots in the field of environment. Undoubtedly, the synthesis of a photocatalytic material with excellent performance is crucial for the degradation of antibiotics in water. So far, many scholars have studied a v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/10C02F1/30C02F101/38
CPCB01J27/24C02F1/30C02F2101/38C02F2305/10B01J35/39B01J35/61
Inventor 黄大伟邴永鑫郑文丽陈思莉常莎李邵祥冯立师张政科胡立才
Owner SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
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