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Zinc aluminate nanometer powder and preparing method thereof

A nano-powder, zinc aluminate technology, applied in nanotechnology and other directions, can solve problems such as unsatisfactory effects, and achieve the effects of low cost, controllable appearance, and high fluffy characteristics

Active Publication Date: 2016-08-03
TIANJIN RES INST FOR ADVANCED EQUIP TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although zinc aluminate nanopowders with various shapes have been prepared, such as spherical, irregular particles, nanowires, porous structures, etc., the effect is still not very satisfactory.

Method used

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  • Zinc aluminate nanometer powder and preparing method thereof
  • Zinc aluminate nanometer powder and preparing method thereof

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preparation example Construction

[0036] Such as figure 1 As shown, the preparation method of zinc aluminate nanopowder in the embodiment of the present application includes as follows:

[0037] 1) Add soluble aluminum salt and zinc salt into the aqueous solution, heat up to 40-70°C under stirring, keep the temperature in the water bath for 20min-60min, and obtain a mixed solution in which the aluminum salt and zinc salt are fully dissolved;

[0038] 2) adding a shape control agent to the mixed solution obtained in step 1), and dissolving the shape control agent under stirring, the concentration of the shape control agent is 0.01-2mol / L;

[0039] 3) Add urea to the mixed solution obtained in step 2), and keep the temperature at 40-70° C. for 1-5 hours to fully dissolve the urea; the molar ratio of the shape control agent to urea is 1:100-1:10;

[0040] 4) Transfer the mixed solution obtained in step 3) to a high-pressure reactor, and react at 120-180° C. for 2-8 hours, wash, filter and dry the obtained produc...

Embodiment 1

[0049] First, aluminum nitrate and zinc sulfate were added to the aqueous solution to obtain a mixed solution, in which the concentration of aluminum nitrate was 2.0 mol / L, and the concentration of zinc sulfate was 1.0 mol / L. The temperature was raised to 60°C under stirring, and the temperature was kept constant in a water bath for 30 minutes. Then add polyvinyl alcohol to it, and fully dissolve the morphology control agent polyvinyl alcohol under stirring, and the concentration of polyvinyl alcohol formed by the added amount is just 0.25mol / L; then add urea to make the concentration 2.5 mol / L, and kept at 60°C for 3 h; finally, the above solution was transferred to a stainless steel autoclave lined with polytetrafluoroethylene. After reacting at 140°C for 5 hours, the product obtained was washed with deionized water and absolute ethanol, filtered with suction, dried in an oven at 80°C for 2 hours, and then roasted in a muffle furnace at 900°C for 2 hours to obtain fluffy sea ...

Embodiment 2

[0052] First, aluminum nitrate and zinc sulfate were added to the aqueous solution to obtain a mixed solution, in which the concentration of aluminum nitrate was 0.1 mol / L, and the concentration of zinc sulfate was 0.05 mol / L. The temperature was raised to 60°C under stirring, and the temperature was kept constant in a water bath for 30 minutes. Then add polyvinyl alcohol therein, and make the morphology control agent fully dissolve under stirring, and the concentration formed by the added amount is just 0.01mol / L; Add urea again, make its concentration be 1.0mol / L, and in Insulate at 60° C. for 3 h; finally transfer the above solution to a stainless steel autoclave lined with polytetrafluoroethylene. After reacting at 150°C for 3h, the obtained product was washed with deionized water and absolute ethanol, filtered with suction, dried in an oven at 75°C for 1.5h, and then roasted in a muffle furnace at 1000°C for 2h to obtain a fluffy sea urchin structure Zinc aluminate nanopo...

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Abstract

The invention provides a zinc aluminate nanometer powder and a preparing method thereof. The preparing method includes the steps that 1, soluble aluminum salt and zinc salt are added into a water solution, the mixture is heated to be at the temperature of 40 DEG C to 70 DEG C under stirring, a water bath is carried out for 20 min to 60 min at the constant temperature, and a mixed solution is obtained; 2, a morphology control agent is added into the mixed solution obtained in the step 1, and dissolved under stirring, wherein the concentration of the morphology control agent is 0.01 mol / L to 2 mol / L; 3, urea is added into the mixed solution obtained in the step 2, and the constant temperature of 40 DEG C to 70 DEG C is kept for 1 h to 5 h, wherein the molar ratio of the morphology control agent to the urea is 1:100-1:10; 4, the mixed solution obtained in the step 3 is transferred to a high-pressure reaction vessel, and is reacted for 2 h to 8 h at the temperature of 120 DEG C to 180 DEG C, the obtained product is washed, subjected to suction filtration, dried at the low temperature, and subjected to high-temperature roasting, and the zinc aluminate nanometer powder is obtained. The zinc aluminate nanometer powder prepared with the method is of a fluffy-sea-urchin-shaped structure, and has the high specific surface area and high fluffiness.

Description

technical field [0001] The invention relates to the field of inorganic materials, in particular to a zinc aluminate nanopowder and a preparation method thereof. Background technique [0002] Aluminum-based spinels are a class of aluminates with important technical applications. Among them, zinc aluminate (ZnAl 2 o 4 ) Due to its good mechanical properties, thermal stability, hydrophobicity, low surface acidity and UV barrier properties, it is especially used as a catalyst and active agent in the fields of high-temperature ceramics, luminescent substrates, optical coatings, catalysts, and active agent carriers. It has important application value in the use of material carrier. As a catalyst and active material carrier, zinc aluminate is mainly used in synthesis, isomerization reaction, dehydrogenation reaction, adsorption, etc. The catalytic activity of a catalyst depends on the effective contact between the reactants and the catalyst. Some important factors such as the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/44B82Y40/00C04B35/622
CPCC04B35/44C04B35/622C04B2235/3284C04B2235/78C04B2235/781
Inventor 付萍王子颖刘繁
Owner TIANJIN RES INST FOR ADVANCED EQUIP TSINGHUA UNIV
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