Method for preparing sheet-shaped nanometer Mg(OH)2 by using electrolyte diaphragm discharge plasma

A diaphragm discharge and electrolyte technology, applied in the field of preparation of flake nano-Mg2, can solve the problems of complicated preparation process and harsh conditions, and achieve the effect of simple equipment, controllable process and easy operation

Inactive Publication Date: 2016-09-07
NORTHWEST NORMAL UNIVERSITY
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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 aim at existing nanoscale Mg(OH) 2 Due to the complex preparation process and harsh conditions, it provides a convenient and fast synthesis of nano-Mg(OH) 2 A new method for the preparation of sheet-like nano-Mg(OH) using electrolyte diaphragm discharge plasma 2

Method used

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  • Method for preparing sheet-shaped nanometer Mg(OH)2 by using electrolyte diaphragm discharge plasma
  • Method for preparing sheet-shaped nanometer Mg(OH)2 by using electrolyte diaphragm discharge plasma
  • Method for preparing sheet-shaped nanometer Mg(OH)2 by using electrolyte diaphragm discharge plasma

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Experimental program
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Embodiment 1

[0034] (1) Treatment of magnesium bars: Take a piece of high-purity magnesium sheet with a size of 3 mm × 20 mm × 1.5 mm, smooth it with water sandpaper, polish it, soak it in acetone for 1 h, and then ultrasonically wash it in ethanol and deionized water for 10 minutes, respectively. min, to remove the grease on the surface, and use the magnesium sheet as the anode.

[0035] (2) Installation of diaphragm discharge device: take 250 mL temperature-controlled reactor 1, add 200 mL 2g / L sodium sulfate solution into the reactor as electrolyte 2, insert a graphite carbon rod with a diameter of 5 mm in the electrolyte as The cathode rod 3 (the depth inserted into the electrolyte is 1.5 cm) and the quartz tube 4, the anode magnesium piece 5 is placed in the quartz tube 4, and a small hole with a diameter of 0.5 mm is opened on the quartz tube 4 at a distance of 1 cm from the bottom of the quartz tube. Hole 6; make the anode and cathode electrolytes connected through this small hole. ...

Embodiment 2

[0038] (1) The processing of magnesium bar: with embodiment 1;

[0039] (2) Installation of the diaphragm discharge device: same as in Example 1;

[0040] (3) Nanosheet Mg(OH) 2 Preparation: control the discharge voltage at 700 V, after continuous discharge for 2 h, white Mg(OH) 2 Turbid liquid; the Mg(OH) 2 After the turbid liquid was ultrasonically dispersed for 10 min, it was centrifuged at a speed of 10000 r / min, washed several times with distilled water to remove the electrolyte sodium sulfate, washed several times with absolute ethanol, and centrifuged. Vacuum dry at 60°C to constant weight and grind to obtain nanometer Mg(OH) 2 , the scanning electron microscope results are shown in Figure 5 b. For the uniformity of the solution, the solution was continuously stirred at 120 r / min.

Embodiment 3

[0042] (1) The processing of magnesium bar: with embodiment 1;

[0043] (2) Installation of the diaphragm discharge instrument: same as in Example 1;

[0044] (3) Nanosheet Mg(OH) 2 Preparation: control the discharge voltage at 750 V, and after continuous discharge for 3 hours, white Mg(OH) 2 Turbid liquid; the Mg(OH) 2 After the turbid liquid was ultrasonically dispersed for 10 min, it was centrifuged at a speed of 10000 r / min, washed several times with distilled water to remove the electrolyte sodium sulfate, washed several times with absolute ethanol, and centrifuged. Vacuum-dry at 70°C to constant weight and grind to obtain nano-Mg(OH) 2 , the scanning electron microscope results are shown in Figure 5 c. For the uniformity of the solution, the solution was continuously stirred at 140 r / min.

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Abstract

The invention provides a method for preparing sheet-shaped nanometer Mg(OH)2 by using electrolyte diaphragm discharge plasma, and belongs to the technical field of preparation of nanometer materials. With a magnesium piece as an anode and a carbon rod as a cathode, instant high temperature and local high pressure are generated along with luminescence and shock waves in liquid by using an electrolyte diaphragm discharge plasma radiation principle; meanwhile, such high-activity particles as HO-, H-, O-, HO2- and H2O2 are generated; and the active particles can trigger multiple chemical reactions to accelerate such reactions as oxidation, reduction, decomposition and hydrolysis to prepare nanometer particles. The method for preparing the sheet-shaped nanometer Mg(OH)2 by using the electrolyte discharge plasma of a sacrificial anode has the advantages of simple equipment, easy operation, mild conditions (wherein room temperature is provided and other gas is not required for protection) and controllable process (wherein, by changing such parameters as electrolyte concentration, voltage or current magnitude and electrifying time, the sheet-shaped nanometer Mg(OH)2 with different structures and different particle sizes can be acquired), and is a new environment-friendly green preparation technology of sheet-shaped nanometer Mg(OH)2.

Description

technical field [0001] The present invention relates to a kind of flaky nano Mg(OH) 2 The preparation method, particularly relates to a kind of utilizing electrolytic solution membrane discharge plasma to directly prepare flake nano-Mg(OH) from metal magnesium flake 2 The method belongs to the technical field of nanomaterial preparation. Background technique [0002] Mg(OH) 2 Due to its good thermal stability, high decomposition temperature, large heat absorption, strong smoke suppression ability, smoke-free, non-toxic and other characteristics (the performance is mostly better than aluminum hydroxide), it has become the most promising environment-friendly inorganic resistor. Combustion agent; In addition, Mg(OH) 2 It can also be used as a high-performance inorganic additive in the preparation of polymer flame-retardant materials. At the same time, Mg(OH) 2 It is a new type of wastewater treatment agent and catalyst. my country Mg(OH) 2 Inorganic flame retardants need...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/20B82Y40/00
CPCB82Y40/00C25B1/20
Inventor 陆泉芳俞洁王亮亮马全福徐海娟陶珮珍
Owner NORTHWEST NORMAL UNIVERSITY
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