Method for preparing nano zinc oxide by using liquid diaphragm discharge plasma

A liquid-phase diaphragm discharge and nano-zinc oxide technology, which is applied in the direction of zinc oxide/zinc hydroxide, nanotechnology for materials and surface science, nanotechnology, etc., can solve the complex preparation process of nano-scale zinc oxide, harsh conditions, Environmental pollution and other issues, to achieve the effect of low cost, mild conditions, and uniform particle size distribution

Inactive Publication Date: 2016-10-12
天雄健新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a convenient, fast and green new method for synthesizing nano-ZnO——preparing nano-ZnO by using liquid-phase diaphr...

Method used

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  • Method for preparing nano zinc oxide by using liquid diaphragm discharge plasma
  • Method for preparing nano zinc oxide by using liquid diaphragm discharge plasma
  • Method for preparing nano zinc oxide by using liquid diaphragm discharge plasma

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Treatment of cathode and anode zinc sheets: Take a high-purity zinc sheet of 4 mm×15 mm×1 mm, grind and polish it with water sandpaper, and then ultrasonically clean it in acetone for 10 min, and then wash it in 0.3 mol / L NaOH aqueous solution Soak for 30 minutes, then wash with distilled water to remove grease and other organic pollutants on the surface of the zinc sheet.

[0039] (2) Liquid-phase diaphragm discharge plasma device: Take 250 mL temperature-controllable reactor 1, add 150 mL 2g / L sodium sulfate solution as electrolyte 2; insert a 4 mm×15 mm×1 mm cathode into the electrolyte A zinc sheet 3 and a quartz tube 4 with a diameter of 1.5 cm; the anode zinc sheet 5 treated above is placed in the quartz tube 4; a small hole 6 with a diameter of 0.5 mm is opened at a distance of 1 cm from the bottom of the quartz test tube to electrolyze the anode and cathode The liquid is connected through the small hole 6; the depth of the cathode and anode inserted into the...

Embodiment 2

[0042] (1) Treatment of cathode and anode zinc sheets: the size of cathode and anode zinc sheets is 5 mm×15 mm×1 mm, and the treatment method is the same as in Example 1.

[0043] (2) Liquid-phase diaphragm discharge plasma device: the same as in Embodiment 1.

[0044] (3) Preparation of nano-zinc oxide: control the voltage between the two electrodes to 650 V, and the current to 110 mA to generate glow in the small hole to form a stable glow discharge plasma; during the discharge process, the anode zinc sheet is continuously consumed, The solution turned milky white. For the uniformity of the solution, the solution was continuously stirred at 110 r / min. After continuous discharge for 2 hours, a white zinc oxide turbid liquid was obtained; after ultrasonic dispersion for 30 minutes, it was centrifuged at a speed of 10,000 r / min, and the product was washed several times with distilled water to remove the electrolyte sodium sulfate, then washed several times with absolute ethano...

Embodiment 3

[0046] (1) Treatment of cathode and anode zinc sheets: the size of cathode and anode zinc sheets is 6 mm×15 mm×1 mm, and the treatment method is the same as that in Example 1.

[0047] (2) Liquid-phase discharge plasma device: same as that of Embodiment 1.

[0048] (3) Preparation of nano-zinc oxide: Control the voltage between the two electrodes to 700 V and the current to 130 mA to generate glow in the small hole and form a stable glow discharge plasma; during the discharge process, the anode zinc sheet is continuously consumed, The solution turned milky white. For the uniformity of the solution, the solution was continuously stirred at 130 r / min. After continuous discharge for 2 hours, a white zinc oxide turbid liquid was obtained; after ultrasonic dispersion for 30 minutes, it was centrifuged at a speed of 10,000 r / min, and the product was washed several times with distilled water to remove the electrolyte sodium sulfate, then washed several times with absolute ethanol, a...

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Abstract

The invention provides a method for preparing nano zinc oxide by using liquid diaphragm discharge plasma. The method produces the nano zinc oxide by using zinc plates as an anode and a cathode and Na2SO4 solution as electrolyte, irradiating the zinc plate of the anode with liquid diaphragm discharge plasma, and electrochemically sacrificing the zinc plate of the anode. By using the principle of radiation chemistry, transient high temperature and local high pressure are produced in liquid with light and shock wave, and high-activity particles are also produced to initiate chemical reactions, enabling the reactions such as oxidation, reduction, decomposition and hydrolysis to prepare nanoparticles; the nano zinc oxide synthesized herein has good dispersity, low aggregating degree and uniform particle size distribution and has a promising application prospect in terms of catalysis, optics, magnetics, mechanics and the like; products are easy to separate, high in purity and free of pollution; in addition, the method has the advantages of mild conditions, controllable process, simple equipment, good operation convenience, low cost and the like and is applicable to industrial production.

Description

technical field [0001] The invention relates to a method for preparing nano-zinc oxide, in particular to a method for preparing nano-zinc oxide by using liquid-phase diaphragm discharge plasma, and belongs to the field of preparation of inorganic nano-materials. Background technique [0002] Nano-ZnO is an ultrafine particle with a particle size of 1-100 nm, which has the size effect, quantum tunneling effect, and surface effect of nanomaterials. Nano-ZnO has a wide band gap (3.7 eV) and a large exciton binding energy (6 eV), which is a material with semiconductor and piezoelectric properties and various unique properties. As a new type of functional nanomaterial, nano-ZnO has the advantages of high chemical activity, nano-scale product size, and large specific surface area compared with traditional ZnO materials. In terms of catalysis and sensitivity, it shows specific performance incomparable to general ZnO products, and can be widely used in ultraviolet shielding, phosph...

Claims

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Application Information

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IPC IPC(8): C01G9/03B82Y30/00
CPCC01G9/03C01P2002/72C01P2002/82C01P2002/85C01P2004/03C01P2004/64
Inventor 俞洁王星陆泉芳张晓敏杨恕修郑继东
Owner 天雄健新材料有限公司
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