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Carbon-based semiconductor composite material and preparation method thereof

A composite material and semiconductor technology, applied in the field of Fe2O3-C3N4-carbon quantum dot carbon-based semiconductor composite materials and their preparation, to achieve the effects of excellent electron storage capacity and efficient degradation

Inactive Publication Date: 2018-08-10
苏州宝澜环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To the best of our knowledge, there is no report on the design and synthesis of Fe 2 o 3 -C 3 N 4 -CQDs carbon-based semiconductor composite material and its application in catalytic degradation of organic pollutants under visible light

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A method for preparing a carbon-based semiconductor composite material, the specific steps are as follows:

[0019] (1) Ferric chloride, CQDs aqueous solution, urea, melamine and water are 1g: 18ml: 0.4g: 2g: 25ml according to the solid-to-liquid mass ratio, and the content of the carbon quantum dot aqueous solution is 5mg / ml and mix uniformly;

[0020] (2) Transfer the above solution to a reaction kettle lined with tetrafluoroethylene for hydrothermal reaction. The specific steps of the reaction are to raise the temperature to 90°C at 4°C / min, keep it for 1.5h, and then rapidly raise the temperature to 260°C at 9°C / min. ℃, keep for 50min, and finally cool to room temperature;

[0021] (3) Washing and vacuum drying at 50°C for 12 hours to obtain Fe 2 o 3 -C 3 N 4 -CQDs visible light photocatalytic composites.

[0022] The preparation method of the carbon quantum dots is to put graphite rods into water, conduct continuous electrolysis at 30V for 120h, and obtain the...

Embodiment 2

[0028] A method for preparing a carbon-based semiconductor composite material, the specific steps are as follows:

[0029] (1) Ferric chloride, CQDs aqueous solution, urea, melamine and water are 1g: 15ml: 0.2g: 1g: 20ml according to the solid-to-liquid mass ratio, and the content of the carbon quantum dot aqueous solution is 1mg / ml and mix uniformly;

[0030] (2) Transfer the above solution to a reaction kettle lined with tetrafluoroethylene for hydrothermal reaction. The specific steps of the reaction are to raise the temperature to 80°C at 3°C / min, keep it for 1h, and then rapidly raise the temperature to 250°C at 8°C / min , kept for 40min, and finally cooled to room temperature;

[0031] (3) Washing and vacuum drying at 50°C for 12 hours to obtain Fe 2 o 3 -C 3 N 4 -CQDs visible light photocatalytic composites.

[0032] The preparation method of the carbon quantum dots is to put graphite rods into water, conduct continuous electrolysis at 30V for 120h, and obtain them ...

Embodiment 3

[0035]A method for preparing a carbon-based semiconductor composite material, the specific steps are as follows:

[0036] (1) Ferric chloride, CQDs aqueous solution, urea, melamine and water are 1g: 20ml: 0.5g: 5g: 30ml according to the solid-to-liquid mass ratio, and the content of the carbon quantum dot aqueous solution is 10mg / ml and mix uniformly;

[0037] (2) Transfer the above solution to a reaction kettle lined with tetrafluoroethylene for hydrothermal reaction. The specific steps of the reaction are to raise the temperature to 100°C at 5°C / min, keep it for 2h, and then rapidly raise the temperature to 270°C at 10°C / min , kept for 60min, and finally cooled to room temperature;

[0038] (3) Washing and vacuum drying at 50°C for 12 hours to obtain Fe 2 o 3 -C 3 N 4 -CQDs visible light photocatalytic composites.

[0039] The preparation method of the carbon quantum dots is to put graphite rods into water, conduct continuous electrolysis at 30V for 120h, and obtain the...

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Abstract

The invention provides a carbon-based semiconductor composite material and a preparation method thereof. Based on CQDs (Carbon Quantum Dots), the carbon-based semiconductor composite material has an excellent electron storage capability and up-conversion fluorescence performance and water-soluble protection can be formed on the surface of the material; Fe2O3 has excellent electron transmission performance and C3N4 has excellent electron migration performance; the CQDs and the C3N4 have a similar conjugated structure so that the CQDs and the C3N4 are stably gathered on the surface of the Fe2O3to form a stable three-phase structure; the conjugated structure of the CQDs and benzene have a pi-pi mutual effect so that the benzene is easily enriched on the surface of the composite material; thethree components have a cooperative effect to efficiently degrade organic gas pollutants under visible light and the degradation efficiency of the benzene can reach 91 percent. High-pressure hydrothermal reaction is carried out by adopting a progressive heating manner to form the uniformly-coated Fe2O3-C3N4-CQDs composite material.

Description

technical field [0001] The technical field of preparation of carbon-based composite materials of the present invention, particularly relates to a kind of Fe 2 o 3 -C 3 N 4 -Carbon quantum dots (CQDs) carbon-based semiconductor composite material and its preparation method. Background technique [0002] Due to its green sustainability, photocatalytic technology has attracted widespread attention of scientists in environmental pollution control and other aspects; however, the large band gap and ultraviolet response of many photocatalytic materials have greatly hindered its development, and it is impossible to achieve large-scale Therefore, it is of great practical significance to develop new photocatalysts with high-efficiency visible light response. [0003] Carbon quantum dots (CQDs) are a new member of the family of carbon nanomaterials, which are non-toxic, high fluorescence quantum yield, good biocompatibility, high light and chemical stability, etc., and can be used ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J37/10B01D53/86B01D53/72B01D53/44
CPCB01D53/007B01D53/864B01D53/8687B01J27/24B01J37/10B01D2257/7027B01D2259/802B01J35/39
Inventor 于香斌
Owner 苏州宝澜环保科技有限公司
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