Preparation method of flaky nanometer zinc oxide powder

A nano-zinc oxide powder and flake technology is applied in the field of preparation of flake nano-zinc oxide powder, can solve the problems of high toxicity, high cost, unfavorable production and environment, and achieves simplified production process, reduced equipment investment, reduced The effect of production costs

Active Publication Date: 2012-01-11
宁夏中色新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These solvents are highly toxic, costly, and unfavorable to production and the environment

Method used

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  • Preparation method of flaky nanometer zinc oxide powder
  • Preparation method of flaky nanometer zinc oxide powder
  • Preparation method of flaky nanometer zinc oxide powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A certain amount of zinc chloride is dissolved in a certain volume of deionized water to prepare a solution with a molar concentration of 0.1 mol / L, and 0.2 wt% of solute weight of PEG 8000 is added. Use an automatic titrator to add 25% ammonia solution dropwise to pH = 11, transfer the solution into a 100 mL Teflon-lined stainless steel reaction kettle so that the filling degree of the reaction kettle is 70%, and conduct hydrothermal treatment at 200 degrees Celsius 24 hours. The product is washed about 5 times with deionized water to remove acid radical ions and impurity ions, and dried at 100 degrees Celsius for about 12 hours to obtain a single dispersed white flaky zinc dioxide powder. The particle size is around 80 nm.

Embodiment 2

[0026] A certain amount of zinc chloride is dissolved in a certain volume of deionized water to prepare a solution with a molar concentration of 0.5 mol / L, and 0.2 wt% of solute weight of PEG 8000 is added. Use an automatic titrator to add 25% ammonia solution dropwise to pH = 11, transfer the solution into a 100 mL Teflon-lined stainless steel reaction kettle so that the filling degree of the reaction kettle is 70%, and conduct hydrothermal treatment at 200 degrees Celsius 24 hours. The product is washed about 5 times with deionized water to remove acid radical ions and impurity ions, and dried at 100 degrees Celsius for about 12 hours to obtain a single dispersed white flaky zinc dioxide powder. The particle size is 60-70 nanometers.

Embodiment 3

[0028] A certain amount of zinc chloride is dissolved in a certain volume of deionized water to prepare a solution with a molar concentration of 1.0 mol / L, and 0.2 wt% of solute weight of PEG 8000 is added. Use an automatic titrator to add 25% ammonia solution dropwise to pH = 11, transfer the solution into a 100 mL Teflon-lined stainless steel reaction kettle so that the filling degree of the reaction kettle is 70%, and conduct hydrothermal treatment at 200 degrees Celsius 24 hours. The product is washed about 5 times with deionized water to remove acid radical ions and impurity ions, and dried at 100 degrees Celsius for about 12 hours to obtain a single dispersed white flaky zinc dioxide powder. The particle size is around 40 nanometers.

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Abstract

The invention provides a preparation method of a flaky nanometer zinc oxide powder, which adopts the following preparation steps: (1) preparing a water-soluble zinc salt solution; (2) under mixing in the room temperature, dripping ammonia water or ammonium salt in the solution till the pH=11, then adding PEG with 0.1-0.6% weight of solute, and finally transferring the prepared solution into a reaction vessel; (3) conducting hydro-thermal treatment of the material in the reaction vessel under the closed condition with the treatment temperature of 160-240 DEG C and the time of 3-24 hours; and (4) cleaning and drying the product with the deionized water so as to obtain the white flaky nanometer zinc oxide powder. The single dispersed nanometer zinc oxide powder can be directly obtained without roasting and grinding for the synthesis of powders, thereby simplifying the production process for industrialized production, reducing the equipment investment, lowering the production cost and being beneficial to mass production.

Description

Technical field: [0001] The invention belongs to the technical field of metal oxide preparation, and also relates to nano-semiconductor material technology, in particular to a method for preparing flake-shaped nano-zinc oxide powder. Background technique: [0002] Nano-zinc oxide can be used as a new type of high-performance high-value-added nanomaterial with a wide energy band (E g =3.2 eV) n-type semiconductor material. Due to the miniaturization of crystal grains and the control of morphology, the surface electronic structure and crystal structure of nano-zinc oxide change, resulting in surface effects, quantum size effects, volume effects, and macroscopic tunnel effects that macroscopic objects do not have. Studies have found that nano-zinc oxide has optical, electrical, magnetic, thermal, and sensitive properties that conventional bulk materials do not have. The product has high activity and has anti-infrared, ultraviolet and bactericidal functions. Piezoelectric mate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G9/02B82B3/00
Inventor 王东新鲍续进钟景明孙本双张立
Owner 宁夏中色新材料有限公司
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