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A preparation method of flower-shaped magnesium oxide loaded with transition metal oxide

A technology of transition metals and oxides, which is applied in the field of preparation of supported nano-oxide materials, can solve problems such as poor controllability, limited application, and non-dense coating, and achieves the effects of short synthesis time, simple implementation, and low cost

Active Publication Date: 2016-10-12
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it cannot solve the problems that the coating is not dense due to incomplete coating during the preparation process, and some of the particles used as shells are not coated, and the controllability is poor, which limits its application.

Method used

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  • A preparation method of flower-shaped magnesium oxide loaded with transition metal oxide
  • A preparation method of flower-shaped magnesium oxide loaded with transition metal oxide
  • A preparation method of flower-shaped magnesium oxide loaded with transition metal oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Accurately weigh 4.8144g of anhydrous magnesium sulfate, dissolve it in 20ml of deionized water to prepare a 2mol / L solution, then add dropwise ammonia water with a mass concentration of 30% in the magnesium salt solution while stirring, when the pH value of the solution is 10.5 , that is, stop adding ammonia water and stirring, and the resulting suspension is aged at room temperature for 120 minutes to obtain a white precipitate, which is filtered, washed, and dried at 75°C for 180 minutes to obtain the flower-shaped magnesium hydroxide used as a template Accurately weigh 1.9328g copper nitrate trihydrate, be dissolved in 200ml deionized water and control the pH value to be 6, add the flower-shaped magnesium hydroxide prepared above in the copper nitrate solution, stir at room temperature for 60min, filter, wash, After drying at 75° C. for 150 minutes, heat preservation at 800° C. for 150 minutes to obtain flower-shaped magnesium oxide loaded with copper oxide.

Embodiment 2

[0028] Accurately weigh 4.8144g of anhydrous magnesium sulfate, dissolve it in 20ml deionized water to prepare a solution of 2mol / L, then add dropwise a mass concentration of 30% in the magnesium salt solution while stirring, when the pH value of the solution is 10.5, That is, stop adding ammonia water and stirring, and the obtained suspension is aged at room temperature for 120 minutes to obtain a white precipitate. The white precipitate is filtered, washed, and dried at 75°C for 180 minutes to obtain a flower-like magnesium hydroxide used as a template. The accurately weighed 2.6050g tin tetrachloride is stirred and dissolved in 200ml deionized water and the pH value is 5, then the flower-shaped magnesium hydroxide prepared in front is added in the tin tetrachloride solution, after stirring at room temperature for 60min, Filter, wash, dry at 75°C for 150 minutes, and then keep warm at 800°C for 150 minutes to obtain flower-shaped magnesium oxide loaded with tin oxide.

Embodiment 3

[0030] Accurately weigh 4.8144g of anhydrous magnesium sulfate, dissolve it in 20ml of deionized water to prepare a 2mol / L solution, then add dropwise ammonia water with a mass concentration of 30% in the magnesium salt solution while stirring, when the pH value of the solution is 10.5 , that is to stop dripping ammonia and stirring, the obtained suspension is aged at room temperature for 120 minutes to obtain a white precipitate, filtered, washed, and dried at 75°C for 180 minutes to obtain flower-shaped magnesium hydroxide used as a template; Accurately weighed 2.9749g of zinc nitrate hexahydrate was stirred and dissolved in 200ml of deionized water and the pH value was adjusted to 6, the flower-shaped magnesium hydroxide prepared above was added to the zinc nitrate solution, stirred at room temperature for 60min, filtered, washed, and After drying at 75° C. for 150 minutes, the dried sample was kept at 800° C. for 150 minutes to obtain flower-shaped magnesium oxide loaded wi...

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Abstract

The invention discloses a preparation method of flower-like magnesium oxide loaded with transition metal oxide. The preparation method includes the steps that an appropriate quantity of flower-like magnesium oxide templates are made according to the preparation amount and stoichiometric ratio of the flower-like magnesium oxide loaded with the transition metal oxide, and a transition metal salt solution with an appropriate volume is prepared, wherein the concentration of the transition metal salt solution is 0.01-0.2 mol / L, and the pH value of the transition metal salt solution is 5-7; then, the prepared flower-like magnesium oxide is added into the prepared transition metal salt solution, and the mixture is stirred for 20-120 min at 10-90 DEG C, filtered, washed and dried for 60-240 min at 60-100 DEG C; finally, the drying product is calcined for 30-240 min at 400-1000 DEG C, and then the final product is obtained. Synthesis time is short, implementation is easy, cost is low, the product has a three-dimensional flower-like structure which is composed of nanosheets and has a high specific area and high porosity, particularly, loaded oxide particles can be evenly, firmly and controllably attached to the nanosheets of the flower-like magnesium oxide, and the preparation method has broad industrial application prospects.

Description

technical field [0001] The invention belongs to the field of preparation of supported nanometer oxide materials. Background technique [0002] In recent years, the synthesis of multi-dimensional structural materials by self-assembly is a hot spot in material synthesis, and morphology control is a key issue in the synthesis of functional materials. The flower-like structure has a high specific surface area, good light absorption and refractive index, and the multi-level structure of the micro-flower, because it integrates the three structures of nanoparticles, nano-sheets and micro-flowers, makes it suitable for recording heads, nanocatalysis, Biosensors, nanomedicine and other fields have good application prospects. Transition metal elements refer to a series of elements in the d-block of the periodic table of elements. There are unpaired electrons in the valence orbital, so they have different physical and chemical properties from other elements. Transition metal oxides g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F5/02
CPCC01G19/02C01P2002/72C01P2004/03C01P2004/88C01P2006/12
Inventor 陈伟凡卓明鹏周文威许云鹏刘洋李治洲
Owner NANCHANG UNIV