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Solvothermal method for preparing Tasker type III (111) crystal face MgO

A solution and temperature control technology, applied in magnesium oxide and other directions, can solve the problems of difficult control, harsh synthesis conditions, and expensive raw materials

Inactive Publication Date: 2015-06-03
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the previous method needs to use methanolysis of magnesium strips under an inert atmosphere to prepare the precursor magnesium methylate, and it needs to be treated with supercritical methanol. On the one hand, the synthesis conditions of high temperature (245C) and high pressure (80-120bar) are relatively harsh , on the other hand, the raw material is expensive and difficult to control

Method used

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  • Solvothermal method for preparing Tasker type III (111) crystal face MgO
  • Solvothermal method for preparing Tasker type III (111) crystal face MgO
  • Solvothermal method for preparing Tasker type III (111) crystal face MgO

Examples

Experimental program
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Effect test

Embodiment 1

[0015] Weigh 0.01mol of magnesium acetate, add it to 100ml of methanol solvent, add 0.01mol of benzyl alcohol while stirring, after uniform dispersion, transfer it to a high-pressure reactor with a volume of 200ml, and place it in a blast drying oven , the temperature is 180°C, and the crystallization time is 20 hours. The reactor was taken out, and after being cooled, it was suction filtered and dried, and placed in a muffle furnace for calcination at a temperature of 550° C. and a calcination time of 4 hours to obtain MgO(111) powder.

experiment example 2

[0017] Take by weighing 0.02mol of magnesium acetate, join in the methanol solvent of 100ml, add the benzyl alcohol of 0.02mol while stirring, after uniform dispersion, transfer to volume and be in the autoclave of 200ml, be placed in the forced air drying oven, temperature The temperature is 100°C, and the crystallization time is 2 days. The reactor was taken out, and after being cooled, it was suction filtered and dried, and placed in a muffle furnace for calcination at a temperature of 550° C. and a calcination time of 4 hours to obtain MgO(111) powder.

experiment example 3

[0019] Take by weighing 0.03mol of magnesium acetate, join in the methanol solvent of 100ml, add the benzyl alcohol of 0.03mol while stirring, after uniform dispersion, transfer to the volume and be in the autoclave of 200ml, be placed in the air blast drying oven, temperature The temperature is 180°C, and the crystallization time is 3 days. The reactor was taken out, and after being cooled, it was suction filtered and dried, and placed in a muffle furnace for calcination at a temperature of 550° C. for 6 hours to obtain MgO(111) powder.

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Abstract

The invention discloses a solvothermal method for preparing Tasker type III (111) crystal face MgO. According to the invention, through benzyl alcohol control, a metastable precursor Mg(OH)(OCH3) with a certain crystal structure is first produced, wherein the process is realized under a relatively mild alcohothermal condition; and Mg(OH)(OCH3) is then thermally decomposed, such that MgO thin-sheet structure with (111) orientation is obtained.

Description

technical field [0001] The invention relates to a preparation method for preparing Tasker III type (111) crystal face MgO, in particular to processes such as the synthesis of intermediates and post-treatment preparation of Tasker III type (111) crystal face MgO. Background technique [0002] The Tasker III polar surface has always been a hot topic for solid-state physicists and surface scientists. In addition to its stable existence mechanism and surface structure itself, the adsorption behavior of the surface and the interaction with the guest also became the focus of research. Whether it is the experimental research of surface science or the theoretical calculation, it is shown that the Tasker III surface has high catalytic and surface activity compared with other surfaces, and may have more application prospects (Phys.Rev.B 2005, 71, (11), 9; Phys. Rev. Lett. 2003, 90, (21), 4.). However, these studies are all conclusions obtained by surface spectroscopy methods under u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F5/06
Inventor 朱卡克周兴贵肖海鹏
Owner EAST CHINA UNIV OF SCI & TECH