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Preparation method for CdS flower-shaped self-assembly structure and obtained product

A self-assembly and sheet-like structure technology, applied in the direction of cadmium sulfide, can solve the problems of unfavorable product precise control and large-scale production, poor controllability of microscopic morphology, complex synthesis process, etc., and achieve high physical and chemical stability and photoelectricity Effects of response properties, narrow size distribution range, and low raw material cost

Inactive Publication Date: 2016-03-16
UNIV OF JINAN
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Problems solved by technology

[0004] At present, the research on CdS self-assembled structure at home and abroad is still in its infancy. There are still many problems in the selection of reaction system, the setting of reaction parameters, and the regulation of microstructure, such as the complex synthesis process, the need for atmosphere protection, and the need for raw materials High cost, low product yield, poor controllability of microscopic morphology, etc., are not conducive to precise control of products and large-scale production

Method used

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  • Preparation method for CdS flower-shaped self-assembly structure and obtained product
  • Preparation method for CdS flower-shaped self-assembly structure and obtained product
  • Preparation method for CdS flower-shaped self-assembly structure and obtained product

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Experimental program
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Effect test

Embodiment 1

[0030] 1.1 Add 0.143g of cadmium chloride (CdCl 2 2.5H 2 O), 2.000g of PVP, 20.0mL of ethylene glycol, 30.0mL of ethylenediamine and 0.230g of thiourea were added to 10.0mL of water, and stirred to obtain a transparent solution;

[0031] 1.2 Transfer the above solution to the reactor and react at 160°C for 24 hours;

[0032] 1.3 After the reaction is over, the product is obtained after centrifugation and washing.

[0033] SEM of the product as figure 1 and 2 As shown, it can be seen from the figure that the obtained product is flower-shaped, with an average diameter of 1.6 μm. The flower-like structure is self-assembled by the CdS sheet-like structure, and the average thickness of the CdS sheet-like structure is 20nm; XRD results such as image 3 As shown, the XRD results are consistent with the standard XRD card (41-1049), which proves that the crystal phase of the obtained product is the wurtzite structure α-CdS phase; the change curve of the photocurrent intensity of t...

Embodiment 2

[0035] 2.1 Add 0.100g of CdCl 2 2.5H 2 O. The PVP of 0.374g, the ethylene glycol of 14.4mL, the ethylenediamine of 24.3mL and the thiourea of ​​0.103g join in 10.0mL water, stir to obtain transparent solution;

[0036] 2.2 Transfer the above solution to the reactor and react at 150°C for 2 hours;

[0037] 2.3 After the reaction, the flower-like self-assembled structure was obtained after centrifugation and washing. The average diameter of the CdS flower-like self-assembled structure is 0.18 μm, and the average thickness of the basic structural unit CdS sheet structure is 7 nm. The XRD pattern of the product and image 3 similar.

Embodiment 3

[0039] 3.1 Add 0.222g of CdCl 2 2.5H 2 O. The PVP of 3.81g, the ethylene glycol of 34.4mL, the ethylenediamine of 25.6mL and the thiourea of ​​0.350g join in 8.0mL water, stir to obtain transparent solution;

[0040] 3.2 Transfer the above solution to the reactor and react at 150°C for 28 hours;

[0041] 3.3 After the reaction, the flower-like self-assembled structure was obtained after centrifugation and washing. The average diameter of the CdS flower-like self-assembled structure is 1.4 μm, and the average thickness of the basic structural unit CdS sheet structure is 16 nm. The XRD pattern of the product and image 3 similar.

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Abstract

The invention discloses a preparation method for a CdS flower-shaped self-assembly structure and the obtained product. The preparation method comprises adding a cadmium salt, PVP, glycol, ethylenediamine and thiourea into water, and stirring to obtain a solution; adding the solution into a reaction kettle and performing solvothermal reaction; and performing centrifugation separation and washing after reaction, so as to obtain the CdS flower-shaped self-assembly structure. The basic unit of the self-assembly structure is a CdS sheet structure, and the thickness is 4-50 nm. The raw material cost is low, the preparation technology is simple, product yield is high, the microscopic morphology repeatability is good, the dimension distribution scope is narrow, and the product possesses relatively high physical chemical stability and photoelectric response properties, and possesses significant meaning on performance research and batch production of the CdS micro-nano material.

Description

technical field [0001] The invention relates to a preparation method of a CdS self-assembly structure and a product thereof, in particular to a preparation method of a size-adjustable CdS flower-like self-assembly structure and the product obtained. Background technique [0002] CdS is an important photosensitive functional semiconductor material, with an energy band gap of 2.4eV at room temperature and an excitonic Bohr radius of about 3nm. It has high visible light absorption capacity and photoreactivity. and other fields have shown important application value. [0003] The structure control of CdS micro-nano materials has become a research hotspot in the field of CdS-based semiconductor materials in recent years. Using hydrothermal method, thermal evaporation method, ultrasonic-assisted microwave method, chemical vapor deposition method, template method, etc. etc.) CdS micro-nanomaterials. Among them, the CdS sheet-like structure has a large specific surface area and c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G11/02
CPCC01G11/02C01P2002/72C01P2004/03C01P2004/45C01P2004/61C01P2004/62C01P2006/40C01P2006/60
Inventor 马谦陈迎王俊鹏车全德陈玲杨萍
Owner UNIV OF JINAN
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