Method for preparing nano granular of zinc oxide in monodisperse

A nano-zinc oxide, monodisperse technology, applied in the direction of zinc oxide/zinc hydroxide, etc., can solve the problems of difficult synthesis of nano-ZnO materials, single and controllable preparation of refractory zinc oxide particle size, and achieve low raw material cost, easy operation, The effect of narrow particle size distribution

Inactive Publication Date: 2005-10-26
ZHEJIANG UNIV
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Problems solved by technology

The existing sol-gel preparation method is difficult to achieve a single controllable preparation of zinc oxide particle size, and the synthesis of nano-ZnO materials with a single particle size distribution is very difficult

Method used

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  • Method for preparing nano granular of zinc oxide in monodisperse

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Embodiment Construction

[0014] The inventive method prepares the example of monodisperse zinc oxide nanoparticle:

[0015] Dissolve zinc acetate in absolute ethanol, stir fully at 0°C to prepare a suspension with a concentration of 2%, and dissolve lithium hydroxide in absolute ethanol at room temperature to prepare a lithium hydroxide solution. The molar concentration Twice that of zinc acetate solution. An equal volume of lithium hydroxide solution was added dropwise to the stirred zinc acetate solution using a dropper, and the mixed solution was maintained at 0°C. Then the above mixed solution was sealed in a high-pressure reaction kettle, kept at 120°C for 2 hours, centrifuged to separate the reaction solution, fully washed with absolute ethanol, and dried to obtain zinc oxide nanoparticles with a single diameter distribution. The transmission electron microscope of the product see photos figure 1 .

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Abstract

The method for preparing mono-dispersed nano zinc oxide granules includes the following steps: (1). dissolving zinc acetate in absolute ethanol or absolute methanol, fully stirring them at zero deg.C to obtain suspended liquor whose concentration is 0.5-30%, dissolving lithium hydroxide in absolute ethanol or absolute methanol at room temperature to obtain lithium hydroxide solution whose molar concentration is twice that of zinc acetate; (2). under the temperature of zero deg.C drop-by-drop adding isopyknic lithium hydroxide solution to stirring zinc acetate solution to obtain white colloidal mixed solution; (3). placing the colloidal solution into a hydrothermal reactor, heat-insulating for 1-3 hr, at 80-200 deg.C, taking out the reaction solution; and (4). cetnrifugally-separating said reaction solution, fully washing said separated material by using absolute ethanol, drying at room temp. so as to obtain the invented product.

Description

technical field [0001] The invention relates to a method for preparing monodisperse nanometer zinc oxide particles. Background technique [0002] Nano-ZnO is a new type of high-function fine inorganic material. Due to its quantum size effect, small size effect, surface effect and macroscopic quantum tunneling effect, nano-ZnO produces these effects that its bulk materials do not have, showing Many special properties: light absorption, light filtering, antibacterial, anti-aging. It has broad applications in medicine, magnetic media, optoelectronics, etc. Nano-zinc oxide can also improve the wear resistance and tear resistance of rubber, and improve the comprehensive mechanical properties. The unique antibacterial function of nano zinc oxide makes it widely used in advanced antibacterial self-cleaning sanitary ceramics, floor tiles, coatings, plastics, etc. It has excellent electrical and optical properties and can be used to manufacture varistors, phosphors, image recording...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/02
Inventor 程继鹏张孝彬
Owner ZHEJIANG UNIV
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