Process for preparing nano cadmium sulfide

A cadmium sulfide, nanotechnology, applied in the direction of cadmium sulfide, etc., to achieve the effects of being conducive to environmental protection, simple process flow, and good safety.

Inactive Publication Date: 2006-08-23
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few electron accelerators used as radiation sources to prepare nanomaterials at home and abroad.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The preparation method and steps in this embodiment are as follows:

[0016] (1) Weigh a certain amount of cadmium chloride and sodium thiosulfate and dissolve them in deionized water respectively to prepare a solution, then mix the two to make a reaction mixed solution; the molar concentration of the cadmium chloride solution is 0.20 mol / L, and the sulfur The molar concentration of the sodium substituted sulfate solution is 0.160mol / L; a small amount of hydrophilic surfactant polyvinyl alcohol is added to the mixed solution to prevent particle agglomeration; then isopropanol is added as an oxygen-free radical OH scavenger , the dosage is 20ml / 100ml;

[0017] (2) place the plastic ziplock bag containing the above-mentioned prepared solution under the electron beam generated by the GJ-2 type electron accelerator and irradiate, and the irradiation dose is 300KGy;

[0018] (3) after irradiation, the suspension reaction solution is centrifuged, and then the precipitate is ...

Embodiment 2

[0021] The preparation steps of this embodiment are the same as those of the above-mentioned embodiment 1, except that the molar concentration of the cadmium chloride solution used is 0.12 mol / L, the molar concentration of the sodium thiosulfate solution is 0.25 mol / L, and the Polyethylene glycol is used as surfactant; the amount of isopropanol added is 15ml / 100ml, and the dose of electron beam irradiation is 250KGy; after irradiation, the suspension is centrifuged, washed, and vacuum-dried to finally obtain lemon yellow nanometers. Cadmium sulfide powder.

[0022] The samples prepared in the above examples are tested by X-ray diffractometer, and the characteristic peaks in the diffractogram are consistent with the peaks of the standard powder diffraction card (PDF card 75-0851), so it can be determined that the lemon yellow powder is pure nano-sulfide. cadmium.

[0023] Observed from the JEM-200CX high-resolution transmission electron microscope, it can be seen that the samp...

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Abstract

The present invention relates to the preparation process of nanometer cadmium sulfide, and belongs to the field of radiochemical nanometer material preparing technology. The preparation process includes the following steps: compounding water solution of cadmium chloride and water solution of sodium thiosulfate; mixing to form mixed reaction solution with cadmium chloride in the concentration of 0.05-0.20 mol / L and sodium thiosulfate in the concentration of 0.125-0.50 mol / L; adding surfactant PVA and free radical -OH eliminating agent isopropanol in the amount of 15-30 ml / 100ml; irradiating the mixture solution with electron beam an electron accelerator produces in the dosage of 100-350 KGY; separating the irradiated reaction suspension centrifugally, washing the precipitate for several times, and vacuum drying at 60 deg.c for 6-8 hr to prepare lemon-yellow nanometer cadmium sulfide powder of average size 20 nm.

Description

technical field [0001] The invention relates to a preparation method of nanometer cadmium sulfide, and belongs to the technical field of radiation chemical nanometer material manufacturing technology. Background technique [0002] Nanomaterials is a very popular research field in the world. Among nanomaterials, semiconductor nanoparticles are called semiconductor nanofunctional materials due to their unique properties and newly discovered laws such as quantum size effect, surface effect and dielectric effect. Because cadmium sulfide nanoparticles have great potential for applications in light, magnetism, catalysis, etc., such as light-emitting diodes, solar cells, sensors, photocatalysis and other fields; at the same time, it also has second-order nonlinear optical properties, and nonlinear optical phenomena are emission, Processing and storage of optical signals and the core issues of modern communication systems have attracted great attention. [0003] There are several ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G11/02
Inventor 周瑞敏陈永康饶卫红
Owner SHANGHAI UNIV
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