Rod-like one-dimensional polycrystalline gamma-Al2O3 nanocrystal grains and preparation method thereof

A nano-grain and rod-shaped technology, which is applied in the field of rod-shaped one-dimensional polycrystalline γ-Al2O3 nano-grain and its preparation, can solve the problems of less cation vacancies, application limitations, adsorption capacity, and small specific surface area, and achieve high specific surface area Effect

Active Publication Date: 2012-01-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While single crystal γ-Al 2 o 3 Because the crystal structure is relatively complete, the corresponding cation vacancies are less, and the adsorption capacity and specific surface area are small, so the application in the field of chemical catalysis such as catalysts, adsorbents and selective separation is limited to a certain extent.

Method used

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  • Rod-like one-dimensional polycrystalline gamma-Al2O3 nanocrystal grains and preparation method thereof
  • Rod-like one-dimensional polycrystalline gamma-Al2O3 nanocrystal grains and preparation method thereof
  • Rod-like one-dimensional polycrystalline gamma-Al2O3 nanocrystal grains and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Prepare 10ml of 0.3mol / L aluminum chloride aqueous solution and 12ml of 1.0mol / L ammonia solution, and then pour them into a mixed solution containing 10ml of aromatic solvent oil (boiling range is 60-120°C) and 15ml of water under vigorous stirring Add 1.2g of surfactant (containing 0.6g of sodium dodecylbenzenesulfonate and 0.6g of sodium p-styrenesulfonate), and stir vigorously to form a stable emulsion. Ammonia solution and aluminum chloride solution were then slowly added to the above emulsion simultaneously. After the dropwise addition, the mixture was separated into static layers, and the uppermost organic phase was taken out and transferred into a pressure vessel lined with polytetrafluoroethylene, and kept sealed under hydrothermal conditions at 180°C for 48 hours. Cool naturally to room temperature, filter and separate the solid product, dry at 90°C for 8 hours, and finally bake at 550°C for 7 hours to obtain the one-dimensional rod-shaped polycrystalline γ-Al...

Embodiment 2

[0034] Prepare 15 ml of 0.3 mol / L aluminum chloride solution and 20 ml of 0.7 mol / L ammonia solution, and then add 10 ml of paraffin solvent oil (boiling range is 60-90 ° C) and 20 ml of water to the mixed solution under vigorous stirring Add 1.0g surfactant (containing 0.3g sodium dodecylbenzenesulfonate and 0.7g sodium dodecylsulfonate) to the mixture, and stir vigorously to form a stable emulsion. Then the ammonia solution and the aluminum nitrate solution were slowly added to the above emulsion at the same time. After the dropwise addition, the mixture was statically separated into layers, and the uppermost organic phase was taken out and transferred into a pressure bomb lined with polytetrafluoroethylene, and kept at 210°C under hydrothermal conditions for 24 hours, and finally the solid product was filtered and separated, and the solid product was separated at 100 After drying at 550°C for 8 hours, and finally sintering at 550°C for 4 hours, the one-dimensional rod-shape...

Embodiment 3

[0036] Prepare 10 ml of 0.3 mol / L aluminum chloride solution and 12 ml of 1.0 mol / L ammonia solution, and then add 10 ml of chain hydrocarbon solvent oil (boiling range is 60-90 ° C) and 25 ml of water to the mixed solution under vigorous stirring Add 2.4g of surfactant (containing 1.6g of sodium dodecylbenzenesulfonate and 0.8g of sodium xylenesulfonate) to the mixture, and stir vigorously to form a stable emulsion. The sodium hydroxide solution and the aluminum sulfate solution were then slowly added to the above emulsion at the same time. After the dropwise addition, the mixture was statically separated into layers, and the uppermost organic phase was taken out and transferred into a pressure vessel lined with polytetrafluoroethylene, and kept at 240°C under hydrothermal conditions for 24 hours, and finally the solid product was filtered and separated, and the solid product was separated at 120 After drying at 600°C for 8 hours, and finally firing at 600°C for 3 hours, the ...

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Abstract

The invention discloses rod-like one-dimensional polycrystalline gamma-Al2O3 nanocrystal grains and a preparation method thereof. The preparation method comprises the following steps of: emulsifying a compound surfactant, water and solvent oil into stable emulsion; simultaneously adding an aluminum source solution and an alkali source solution into the emulsion; and after the emulsion is demixed and stable, transferring the uppermost organic phase into an autoclave, sealing for reaction, and washing, separating, drying and roasting a reaction product to obtain the gamma-Al2O3 nanocrystal grains, wherein the gamma-Al2O3 nanocrystal grains have the diameter of 10 to 25nm and the length of 80 to 500nm and are regular-shaped rod-like one-dimensional polycrystalline gamma-Al2O3 nanocrystal grains, and have high specific surface area. The gamma-Al2O3 nanocrystal grains can be applied to the fields of catalysts, adsorbents, selective separation and the like.

Description

technical field [0001] The invention relates to a rod-shaped one-dimensional polycrystalline γ-Al 2 o 3 The invention relates to a nano crystal grain and a preparation method thereof, which belong to the field of inorganic material preparation. Background technique [0002] Nanomaterials are currently one of the hotspots in the field of materials research at home and abroad. The morphological characteristics of nanoparticles are closely related to the properties of materials to a large extent. One-dimensional nanomaterials refer to new nanomaterials with at least two dimensions at the nanometer scale in space, such as nanowires, nanorods, nanotubes, nanosheets and other forms. One-dimensional nanomaterials have excellent physical and chemical properties due to their shape anisotropy, and have broad application prospects in the fields of solar cells, sensors, catalysts, adsorbents, and selective separation. Therefore, the preparation and performance research of one-dimensi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/02C30B29/20C30B29/62C30B7/06
Inventor 杨卫亚沈智奇凌凤香孙万付王丽华季洪海郭长友
Owner CHINA PETROLEUM & CHEM CORP
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