Preparation of nano cuprous oxide by two-step method of electron beam irradiation and compressed air oxidation

A nano-cuprous oxide, electron beam irradiation technology, applied in copper oxide/copper hydroxide, nanotechnology, nanotechnology and other directions, to achieve the effect of simple process flow and easy reaction control

Inactive Publication Date: 2009-10-21
SHANGHAI UNIV
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  • Claims
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AI Technical Summary

Problems solved by technology

Electron beam irradiation method to prepare nano-cuprous ox

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0031] Prepare 0.05mol / L copper sulfate with deionized water, use an appropriate amount of polyethylene glycol (PEG) as a surfactant, oscillate ultrasonically for 20 minutes, adjust the pH value of the solution to 4.0 with ammonia water and acetic acid, and adjust the above configuration The solution is placed in a container, irradiated at normal temperature and pressure under the electron beam produced by the GJ-2 type nanoaccelerator, and the irradiation dose is 300kGy, and then the air is passed into the irradiated suspension to carry out the oxidation reaction for 8 hours. The air flow rate was 3L / min. After the reaction was completed, the suspension was centrifuged and washed 5 times with deionized water and absolute ethanol. The obtained product was dried in a vacuum oven at 60°C for 3 hours to finally obtain gray cuprous oxide powder. The morphology of the prepared nano-cuprous oxide particles was observed by transmission electron microscopy (TEM), the particle size dist...

Embodiment 2

[0033] Change following conditions, other conditions are with embodiment 1.

[0034] Prepare 0.08mol / L copper sulfate with deionized water, use polyvinylpyrrolidone (PVP) as a surfactant, irradiate the sample, then pass air into the irradiated suspension to react, centrifuge, wash, and vacuum dry to obtain Gray cuprous oxide powder.

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Abstract

The invention relates to preparation of nano cuprous oxide by a two-step method of electron beam irradiation and compressed air oxidation, which comprises the steps: taking cupric sulfate as a raw material, and preparing 0.05 mol/L cupric sulfate by using deionized water; taking polyethylene glycol (PEG) as a surfactant; using ammonia water and acetic acid to adjust the pH value of a cupric sulfate solution to be 4.0; using high-energy electron beams generated by an electron accelerator to irradiate the cupric sulfate solution at normal temperature and pressure, wherein the irradiation dose is 300 kGy; controlling the dimension of irradiated product particles by controlling the growth rate of crystal nucleus through the surfactant and the concentration of copper ions in the solution; introducing air into irradiated suspension for oxidation reaction at normal temperature and pressure, wherein the airflow rate is 3 L/min, and the reaction time is 8 hours; performing centrifugal separation and washing on the suspension after reaction; and drying the obtained product for 3 hours in a vacuum drying chamber, and obtaining grey cuprous oxide powder. The nano cuprous oxide particles are spherical; and the particle diameter of the nano cuprous oxide particles is between 25 and 50 nanometers, and the mean particle diameter of the nano cuprous oxide particles is 30 nanometers.

Description

technical field [0001] The invention relates to a method for preparing cuprous oxide nanoparticles, in particular to a method for reducing divalent copper ions by high-energy electron irradiation to obtain a mixture of cuprous oxide and copper, and then passing air into the mixture at normal temperature and pressure The copper is oxidized to cuprous oxide, the cuprous oxide in the original mixture remains unchanged, and the final product is cuprous oxide. It belongs to the field of radiation chemical manufacturing nanometer material technology. Background technique [0002] Cuprous oxide (Cu 2 O) is a typical metal-deficient p-type semiconductor with an energy level difference of 2.0-2.17eV, which can completely trigger photocatalytic reactions under the radiation of sunlight. Cuprous oxide has unique optical and magnetic properties. Therefore, it has applications in solar energy conversion, magnetic storage devices, catalysts, biosensors, etc.: [0003] 1. Cuprous oxide...

Claims

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Application Information

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IPC IPC(8): C01G3/02B82B3/00
Inventor 周瑞敏林香凤费舜庭邓邦俊张建强
Owner SHANGHAI UNIV
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