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Method used for preparing carbon-coated Cu-doped CdS flower-shaped nano composite structure photocatalyst conveniently

A nano-composite and carbon-coated technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of high preparation cost, complex synthesis process, difficult control, etc., and achieve low product cost , good repeatability and high uniformity

Inactive Publication Date: 2017-05-31
ZHEJIANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the disadvantages of high preparation cost, complex synthesis process, difficult control, low product uniformity, low output, poor repeatability and serious photocorrosion phenomenon in the existing CdS nanostructured photocatalyst method. Provides a simple method for preparing carbon-coated Cu-doped CdS flower-like nanocomposite photocatalysts with low cost, easy control, good repeatability, and products with photocorrosion resistance

Method used

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  • Method used for preparing carbon-coated Cu-doped CdS flower-shaped nano composite structure photocatalyst conveniently
  • Method used for preparing carbon-coated Cu-doped CdS flower-shaped nano composite structure photocatalyst conveniently
  • Method used for preparing carbon-coated Cu-doped CdS flower-shaped nano composite structure photocatalyst conveniently

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Weigh 0.7993g of cadmium chloride, 4.4mg of copper sulfate, 0.2663g of thiourea, 0.5g of glucose and 0.389g of polyvinylpyrrolidone (PVP) and dissolve them in 35mL of ethylene glycol, form a homogeneous solution by ultrasonic dispersion, and then stir for 20 minutes , stop stirring. Put the mixed solution obtained above into a 50mL reaction kettle, react at 160°C for 11 hours, take the suspension, wash it by centrifugation, and dry it at 60°C. The sample label is C-Cu0.5%Cd99.5%S.

[0021] Do X-ray diffraction analysis for the CdS flower-like nanocomposite structures coated with different Cu doping amounts prepared in all examples, the results are as follows figure 1 As shown, its abscissa X is the diffraction angle (2θ), and the ordinate Y is the relative diffraction intensity; figure 1 XRD patterns of CdS flower-like nanocomposite structure samples coated with medium carbon with different Cu doping amounts, all diffraction peaks correspond to lattice constants and ...

Embodiment 2

[0024] Weigh 0.7993g of cadmium chloride, 7.1mg of copper sulfate, 0.2663g of thiourea, 0.5g of glucose and 0.389g of polyvinylpyrrolidone (PVP) and dissolve them in 35mL of ethylene glycol, form a homogeneous solution by ultrasonic dispersion, and then stir for 20 minutes , stop stirring. Put the mixed solution obtained above into a 50mL reaction kettle, react at 170°C for 8 hours, take the suspension, wash it by centrifugation, and dry it at 60°C. The sample label is C-Cu0.8%Cd99.2%S.

[0025] For the sample C-Cu0.8%Cd992%S core-shell nanospheres prepared in this embodiment, the field emission scanning electron microscope analysis is done, and the electron microscope photos obtained are as follows image 3 As shown, it can be seen that the product can be seen that the output of the carbon-coated Cu-doped CdS flower-like nanocomposite structure photocatalyst is large, the size is uniform, and the diameter is about 350nm.

[0026] For the C-Cu0.8%Cd99.2%S flower-like nano-com...

Embodiment 3

[0028] Weigh 0.7993g of cadmium chloride, 8.8mg of copper sulfate, 0.2663g of thiourea, 0.5g of glucose and 0.389g of polyvinylpyrrolidone (PVP) and dissolve them in 35mL of ethylene glycol, form a homogeneous solution by ultrasonic dispersion, and then stir for 20 minutes , stop stirring. Put the mixed solution obtained above into a 50mL reaction kettle, react at 180°C for 7 hours, take the suspension, wash it by centrifugation, and dry it at 60°C. The sample number is C-Cu1%Cd99%S.

[0029] For the C-Cu1%Cd99%S flower-shaped nano-composite structure photocatalyst prepared in this example is analyzed by X-ray photoelectron spectrometer (XPS), the results are as follows Figure 6 As shown, the abscissa X is the binding energy (eV), and the ordinate Y is the relative diffraction intensity. It can be seen that the C-Cu1%Cd99%S flower-like nanocomposite structure photocatalyst prepared in this example has Cu, Cd, S, and C four elements.

[0030] For samples with different Cu do...

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Abstract

The invention discloses a method used for preparing a carbon-coated Cu-doped CdS flower-shaped nano composite structure photocatalyst conveniently. The method is used for solving problems in the prior art that preparation cost of CdS nano structure photocatalyst is high, synthesis process is complex and is difficult to control, product uniformity is poor, yield is low, repeatability is low, and much photocorrosion is caused. The method is low in cost, and high in repeatability, and is convenient to control; and an obtained product possesses photocorrosion resistance. According to the method, cadmium chloride, thiourea, glucose, copper sulphate, and polyvinylpyrrolidone (PVP) are taken as reaction reagents, glycol is taken as a solvent, one-step solvothermal reaction is adopted, and an obtained liquid is subjected to centrifugation, washing, and drying so as to obtain the carbon-coated Cu-doped CdS flower-shaped nano composite structure photocatalyst product.

Description

technical field [0001] The invention belongs to the technical field of preparation of carbon-coated Cu-doped CdS flower-like nano-composite structure photocatalysts, in particular to a method for conveniently preparing carbon-coated Cu-doped CdS flower-like nano-composite structure photocatalysts. Background technique [0002] Cadmium sulfide (CdS) is a typical II-IV semiconductor compound with a forbidden band width of 2.42eV. The potential potential of the conduction band is more negative than the reduction potential of H10 / H2, and the potential potential position of the valence band is more negative than that of 02 / H2. The potential of H20 is corrected and can be excited by visible light for photocatalytic hydrogen production. However, the biggest drawback of pure CdS is that it is prone to photocorrosion in aqueous solution after long-term illumination, which greatly limits the practical application. In order to solve this problem, scientists have done a lot of scientif...

Claims

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Application Information

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IPC IPC(8): B01J27/04
CPCB01J27/04B01J35/39
Inventor 胡勇何斌沈峻岭
Owner ZHEJIANG NORMAL UNIVERSITY
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