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A kind of preparation method and application of carbon quantum dot cqds hybrid cdin2s4 composite material

A technology of carbon quantum dots and composite materials, which is applied to the preparation and application of carbon quantum dots CQDs hybrid CdIn2S4 composite materials, can solve the problems of low photocatalytic quantum efficiency, low solar energy utilization rate, and limited wide application, etc. The effect of quantum efficiency, improving quantum yield, and improving catalytic performance

Active Publication Date: 2019-04-02
广东誉谱检测科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] In recent years, environmental pollution and energy depletion have become the primary problems that curb human development, and the green method of photocatalytic degradation of organic pollutants using solar energy has attracted widespread attention; however, due to the wide band gap of most photocatalysts, Photocatalytic reactions require high energy excitation, resulting in low solar energy utilization, which limits its development. Therefore, it is of great significance to develop high-efficiency photocatalysts with visible light response.
[0003] With the development of functional materials, the development of a variety of metal sulfides with high catalytic performance has become a hot spot in material science research; CdIn 2 S 4 It is a new type of semiconductor photocatalytic material with unique photoelectric and catalytic properties. It has a narrow band gap, good chemical stability, and strong absorption capacity in the visible light region, which can improve the utilization rate of light energy; however, its light Catalytic quantum efficiency is low, which limits its wide application

Method used

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  • A kind of preparation method and application of carbon quantum dot cqds hybrid cdin2s4 composite material
  • A kind of preparation method and application of carbon quantum dot cqds hybrid cdin2s4 composite material
  • A kind of preparation method and application of carbon quantum dot cqds hybrid cdin2s4 composite material

Examples

Experimental program
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Effect test

example 1

[0025] (1) Weigh 0.01g carbon quantum dots CQDs in a round bottom flask, wherein the diameter of CQDs is 2-5nm; then add 150mL deionized water and stir for 5min;

[0026] (2) Weigh 0.99g of CdIn 2 S 4 Nanoparticles in CQDs dispersion, where CdIn 2 S 4 The diameter is 50-300nm; Stir for 5min to get CdIn 2 S 4 Nanoparticle / CQDs suspension; followed by heating and reflux reaction at 70°C in an oil bath for 8h, after the reaction, the product was centrifuged, washed with deionized water and absolute ethanol twice, and then dried at 50°C under vacuum for 10h to prepare Carbon Quantum Dots CQDs Hybrid CdIn 2 S 4 Composite materials, products in which the mass fraction of CQDs is 1%.

[0027] The sample was irradiated under visible light for 3 hours, and the degradation rate of RhB reached 82.1%, and the degradation rate of levofloxacin reached 53.6%.

[0028] attached figure 1 For the SEM figure that is made by example 1, it can be seen from the figure that CdIn 2 S 4 The...

example 2

[0030] (1) Weigh 0.09g carbon quantum dots CQDs in a round bottom flask, wherein the diameter of CQDs is 2-5nm; then add 175mL deionized water and stir for 7min;

[0031] (2) Weigh 5.91g CdIn 2 S 4 Nanoparticles in CQDs dispersion, where CdIn 2 S 4 The diameter is 50-300nm; stir 0min to get CdIn 2 S 4Nanoparticles / CQDs suspension; then use an oil bath to heat and reflux at 80°C for 6h, centrifuge the product after the reaction, wash with deionized water and absolute ethanol twice, and dry it under vacuum at 50°C for 7h to obtain Carbon Quantum Dots CQDs Hybridized CdIn 2 S 4 Composite materials, products in which the mass fraction of CQDs is 1.5%.

[0032] The sample was irradiated under visible light for 3 hours, and the degradation rate of levofloxacin reached 61.4%, and the degradation rate of RhB reached 93.8%.

example 3

[0034] (1) Weigh 0.05g carbon quantum dots CQDs in a round bottom flask, wherein the diameter of CQDs is 2-5nm; then add 170mL deionized water and stir for 7min;

[0035] (2) Weigh 1.95g of CdIn 2 S 4 Nanoparticles in CQDs dispersion, where CdIn 2 S 4 The diameter is 50-300nm; Stir for 15min to get CdIn 2 S 4 Nanoparticles / CQDs suspension; then use an oil bath to heat and reflux at 80°C for 6h. After the reaction, the centrifuged product is washed with deionized water and absolute ethanol twice, and then dried at 60°C under vacuum for 8h , to obtain carbon quantum dots CQDs hybrid CdIn 2 S 4 Composite materials, products in which the mass fraction of CQDs is 2.5%.

[0036] The sample was irradiated under visible light for 3 hours, and the degradation rate of levofloxacin reached 72.5%.

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Abstract

The invention belongs to preparation of nano composite materials, and the field of environmental governance, and discloses a preparation method of a carbon quantum dot CQDs hybridized CdIn2S4 composite material and a catalysis property of the carbon quantum dot CQDs hybridized CdIn2S4 composite material. The preparation method comprises the following steps: by taking carbon quantum dot CQDs and CdIn2S4 nanoparticles as raw materials, mixing the raw materials according to a certain ratio, and preparing a CdIn2S4 composite material nanoparticle composite photocatalyst which is hybridized with CQDs in different ratios by using a backflow method. The composite photocatalyst prepared by using the method can be used for degrading rhodamine B and an antibiotic levofloxacin in the presence of visible light. The material has the advantages that n the preparation method is simple, the cost is low, the energy consumption is small, the raw material is rich and clean, the reaction condition is gentle and the like; the carbon quantum dot CQDs hybridized CdIn2S4 composite photocatalyst is a good visible light response type composite photocatalyst, shows excellent photoproduction electron separation efficiency and excellent visible light catalysis activity, and has important application prospects in organic wastewater treatment.

Description

technical field [0001] The invention relates to a carbon quantum dot CQDs hybrid CdIn 2 S 4 The preparation and application of the composite belong to the application in the field of preparation of composite materials and environmental treatment. Background technique [0002] In recent years, environmental pollution and energy depletion have become the primary problems that curb human development, and the green method of photocatalytic degradation of organic pollutants using solar energy has attracted widespread attention; however, due to the wide band gap of most photocatalysts, Photocatalytic reactions require high energy excitation, resulting in low utilization of solar energy, which limits its development. Therefore, it is of great significance to develop high-efficiency photocatalysts with visible light response. [0003] With the development of functional materials, the development of a variety of metal sulfides with high catalytic performance has become a hot spot i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/04A62D3/17A62D101/28A62D101/26
CPCA62D3/17A62D2101/26A62D2101/28B01J27/04B01J35/004
Inventor 蒋银花彭志远黄刚林李凡刘佩佩张文莉
Owner 广东誉谱检测科技有限公司
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