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Process for preparing nano-grade cadmium sufide hollow ball

A technology of cadmium sulfide and hollow spheres, applied in the direction of cadmium sulfide, can solve the problems of reducing the purity of nanoparticles, cumbersome experimental operation, etc., and achieve the effects of high yield, simple process and good reproducibility

Inactive Publication Date: 2006-06-28
NANJING NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this method, the introduction of PSA hard template will lead to the reduction of the purity of nanoparticles, and the experimental operation is relatively cumbersome.

Method used

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  • Process for preparing nano-grade cadmium sufide hollow ball
  • Process for preparing nano-grade cadmium sufide hollow ball

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1: Dissolve 0.2Kg of PEG in 1L of deionized water to dissolve it. 0.15KgCd(NO 3 ) 2 4H 2 O and 0.12Kg Na 2 S·9H 2 O was dissolved in the above 0.5L PEG solution respectively to obtain solutions A and B. Control the temperature at 30-40°C, slowly add solution B to solution A dropwise, and the color of the solution changes from colorless to yellow. After the reaction, the reaction solution was centrifuged, the supernatant was discarded, the precipitate was repeatedly washed with water, centrifuged for 3 to 5 times, and dried in vacuum to obtain a CdS sample. This description can be so.

[0026] This example proves that: when the PEG feeding amount is 0.2Kg, the TEM image of the prepared CdS hollow sphere is as follows figure 1 shown. It can be seen from the figure that the diameters of CdS hollow spheres are distributed in the range of 10-30nm, and the average diameter is 20nm. Further observations with high-resolution transmission electron microscopy ...

Embodiment 2

[0027] Embodiment 2: substantially the same as embodiment 1, but Cd(NO 3 ) 2 4H 2 O consumption is 0.15Kg.

[0028] When the PEG feeding rate is 0.05Kg, the diameter distribution of the obtained CdS hollow spheres is 3-10 nm, and the average diameter is 5 nm.

Embodiment 3

[0029] Embodiment 3: substantially the same as embodiment 1, but Cd(NO 3 ) 2 4H 2 O consumption is 0.5Kg.

[0030] When the PEG feeding rate is 0.5Kg, the diameter distribution of the obtained CdS hollow spheres is 5-10 nm, and the average diameter is 7 nm.

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Abstract

A process for preparing hollow cadmium sulfide nano-balls includes such steps as dissolving polyethandiol in deionized water, respectively dissolving cadmium nitrate and sodium sulfide in it to obtain two solutions, mixing them in ultrasonic condition, reaction, washing, depositing and drying.

Description

technical field [0001] The invention relates to a preparation method of nanoscale cadmium sulfide hollow spheres. Background technique [0002] CdS is an important II-VI optoelectronic semiconductor material with a bandwidth of 2.42eV at room temperature. It has a wide range of applications in light-emitting diodes, solar cells, photocatalysis, nonlinear optical materials, sensors and information storage. Semiconductor nanomaterials are a hot research topic in recent years. In terms of the preparation of CdS nanoparticles, many literatures have reported the preparation methods of solid CdS nanoparticles and CdS nanowires, but the reports on nanoscale CdS hollow spheres are relatively rare. Qian Yitai's research group used thiourea and CdSO 4 , after 30 days of reaction, CdS hollow spheres with an average diameter of about 350nm were obtained. Song et al. synthesized a PSA / CdS core / shell structure in a polyvinylpyrrolidone (PVP) system using polysulfoneamide (PSA) as a tem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G11/02
Inventor 包建春张杰戴志晖
Owner NANJING NORMAL UNIVERSITY
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