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Method for preparing anthoid crystalline magnesium hydroxide film in microcosmic appearance

A magnesium hydroxide, micro-morphology technology, applied in the electrolysis process, electrolysis components and other directions, to achieve the effect of short time, low temperature and energy saving

Inactive Publication Date: 2007-05-09
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, there has been no report on the direct preparation of magnesium hydroxide films containing flower-like crystals with microscopic morphology by electrochemical cathodic deposition.

Method used

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  • Method for preparing anthoid crystalline magnesium hydroxide film in microcosmic appearance
  • Method for preparing anthoid crystalline magnesium hydroxide film in microcosmic appearance
  • Method for preparing anthoid crystalline magnesium hydroxide film in microcosmic appearance

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A traditional glass electrolytic cell was used, with ITO as the cathode, a platinum electrode as the counter electrode, and a saturated calomel electrode (SCE) as the reference electrode. The electrolyte solution is an aqueous solution of 0.1mol / L magnesium nitrate and 0.2 sodium acetate, the cathode potential is at -1.5V (relative to SCE), the time is 2 hours, room temperature. As a comparison, a magnesium nitrate solution without sodium acetate was used as the electrolyte, that is, a 0.1mol / L magnesium nitrate aqueous solution, and other conditions were the same. The prepared magnesium hydroxide thin film was characterized by XRD and SEM.

[0037] The characterization results show that the XRD diffraction peaks of the prepared film (see Figure 1) are consistent with the standard magnesium hydroxide diffraction card, indicating that both are films of magnesium hydroxide. But the SEM result (see Fig. 2) shows that the film prepared from the cathode electrodeposition of...

Embodiment 2

[0039] A traditional glass electrolytic cell was used, with ITO as the cathode, a platinum electrode as the counter electrode, and a saturated calomel electrode (SCE) as the reference electrode. The electrolyte solution is an aqueous solution of 0.1mol / L magnesium nitrate and 0.025 sodium acetate, the cathode potential is at -1.5V (relative to SCE), the time is 2 hours, room temperature.

[0040] XRD characterization results show that the prepared film is magnesium hydroxide film. The SEM results (see Figure 3) show that the magnesium hydroxide film is composed of magnesium hydroxide with flower-like crystal morphology and porous network magnesium hydroxide, wherein the ratio of magnesium hydroxide with flower-like crystal morphology in the film is about 5-5. 7%.

Embodiment 3

[0042] A traditional glass electrolytic cell was used, with ITO as the cathode, a platinum electrode as the counter electrode, and a saturated calomel electrode (SCE) as the reference electrode. The electrolyte solution is an aqueous solution of 0.1mol / L magnesium nitrate and 0.1 sodium acetate, the cathode potential is -1.5V (relative to SCE), the time is 2 hours, room temperature.

[0043] XRD characterization results showed that the films prepared by cathodic electrodeposition were all magnesium hydroxide films. SEM results (see Figure 4) show that the magnesium hydroxide film is composed of magnesium hydroxide with flower-shaped crystal morphology and porous network magnesium hydroxide, wherein the ratio of magnesium hydroxide with flower-shaped crystals in the film is about 40~ 60%.

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Abstract

This invention discloses a method for preparing Mg (OH) 2 thin film with flower-like microstructure. The method comprises electrolyzing Mg(NO3)2 and NaAC aqueous solutions using ionic liquid as the additive by cathode electrodeposition to obtain Mg(OH)2 thin film with flower-like microstructure. The Mg (NO3)2 and NaAC concentrations in the electrolyte are 0.1-0.2 mol / L and 0.025-0.2 mol / L, respectively. The ratio of Mg (OH) 2 with flower-like microstructure in the thin film is 5-100% by changing the NaAC concentration in the electrolyte. The method has such advantages as easy operation, low energy consumption and low preparation temperature (room temperature).

Description

technical field [0001] The invention relates to a preparation method of a nano film, in particular to a preparation method of a magnesium hydroxide film containing a flower-like crystal in microscopic appearance. Background technique [0002] Magnesium hydroxide is a flaky crystal of the hexagonal system, an inorganic weak base product, insoluble in water, but soluble in strong acidic solutions. Magnesium hydroxide has many excellent properties such as high activity and adsorption capacity, safe use, non-corrosive, non-toxic and harmless, etc., as an "environmentally friendly flame retardant", "green, safe and mild neutralizer" and adsorption Agents have a wide range of applications. [0003] Magnesium hydroxide is a new type of inorganic flame retardant developed in recent years. It has the advantages of good thermal stability, no pollution, and good smoke suppression effect. Compared with other similar inorganic flame retardants, it has better smoke suppression effect. ...

Claims

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Application Information

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IPC IPC(8): C25B1/20
Inventor 陈卫祥邹光龙马琳李辉
Owner ZHEJIANG UNIV
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