Preparation method of aluminum doped zinc oxide nano powder

An aluminum-doped zinc oxide and nano-powder technology, applied in the field of nano-materials, can solve the problems of wide particle size distribution range, difficult chloride ion washing, difficult industrialized production, etc., and achieves narrow particle size distribution range, simple process, The effect of short reaction times

Inactive Publication Date: 2013-11-20
DALIAN JIAOTONG UNIVERSITY
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  • Abstract
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  • Claims
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Problems solved by technology

[0004] There are some shortcomings in the above-mentioned various methods. For example, if chlorine salt is used as raw material, there will be problems such as the difficulty in washing chloride ions, the residual chloride ions in the powder will corrode the device, and hinder the densification of the target material; The glue method or non-basic solution method has problems such as serious waste of organic matter, high cost and serious agglome

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  • Preparation method of aluminum doped zinc oxide nano powder
  • Preparation method of aluminum doped zinc oxide nano powder

Examples

Experimental program
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Embodiment 1

[0043] Weigh 29.749g (0.1mol) of zinc nitrate hexahydrate and 3g (0.05mol) of urea, configure it with deionized water to form a 500ml zinc nitrate-urea solution, place the mixed solution in a beaker, and heat it to 95 with a magnetic stirrer. °C for 1 hour to obtain a white sol microemulsion precursor, which was left to stand for 24 hours and then filtered. The filtrate obtained by filtration contains a small amount of zinc hydroxide ultrafine particles, and the filtrate is used for later use. The filter cake is rinsed with deionized water for 5 times and then placed in a drying oven for 5 hours at 100 degrees Celsius. After drying, the precursor After cooling to room temperature, grind and pass through a 200-mesh sieve. Finally, the precursor obtained by sieving was calcined at 450 degrees centigrade for 2 hours to obtain white zinc oxide nanopowder. Add 5ml of aluminum nitrate solution to the zinc nitrate filtrate containing a small amount of zinc hydroxide, wherein the mas...

Embodiment 2

[0048] Weigh 29.749g (0.1mol) of zinc nitrate hexahydrate and 1.5g (0.025mol) of urea, and configure it with 250ml of zinc nitrate-urea solution with deionized water. This mixed solution is placed in a beaker and heated to Stir at 90°C for 2 hours to obtain a white sol microemulsion precursor, which is left to stand for 12 hours and then filtered. The filtrate obtained by filtration contains a small amount of zinc hydroxide ultrafine particles, and 5ml of aluminum nitrate solution is added to the filtrate, wherein the quality of aluminum nitrate is 0.375g (0.001mol), and 6g of sodium carbonate powder is weighed in addition to be configured into 300ml of sodium carbonate aqueous solution. Weigh 30mg of polyvinyl alcohol and configure it into 200ml of polyvinyl alcohol aqueous solution. At the same time, add the zinc-aluminum nitrate mixed solution and the sodium carbonate solution into the polyvinyl alcohol aqueous solution, control the reaction temperature at 50°C, the reactio...

Embodiment 3

[0051] Weigh 29.749g (0.1mol) of zinc nitrate hexahydrate and 0.3g (0.005mol) of urea, and configure it with 2000ml of zinc nitrate-urea solution with deionized water. This mixed solution is placed in a beaker and heated to Stir at 50°C for 1 hour to obtain a white sol microemulsion precursor, which is left to stand for 48 hours and then filtered. The filtrate obtained by filtration contains a small amount of zinc hydroxide ultrafine particles, and 5ml of aluminum nitrate solution is added to the filtrate, wherein the quality of aluminum nitrate is 1.875g (0.005mol), and 6g of sodium carbonate powder is weighed in addition to be configured into 300ml of sodium carbonate aqueous solution. Weigh 20mg of polyvinyl alcohol and configure it into 200ml of polyvinyl alcohol aqueous solution. At the same time, add the zinc-aluminum nitrate mixed solution and the sodium carbonate solution into the polyvinyl alcohol aqueous solution, control the reaction temperature to 85°C, the reactio...

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Abstract

The invention discloses a preparation method of aluminum doped zinc oxide nano powder. A technological process of the preparation method is shown as follows: first synthesizing a zinc nitrate-urea white sol microemulsion, standing, then filtering, adding aluminum nitrate into a filtering liquid to form a zinc nitrate aluminum mixed solution; preparing a sodium carbonate solution, dropping both the sodium carbonate solution and the zinc nitrate aluminum mixed solution into a polyvinyl alcohol aqueous solution to synthesize a white precipitate precursor; standing and filtering, and thus obtaining the aluminum doped zinc oxide nano powder through deionized water leaching, drying, grinding, sieving and calcining of a filter cake. The aluminum doped zinc oxide nano powder obtained by the method has good dispersibility and less agglomeration, the powder particle size is between 5 and 30 nm, the particle size distribution range is narrow, and the morphology is spherical or quasi spherical. The method has the advantages of simple process, low cost, short reaction period, high yield, and easy control of the reaction processes, and is suitable for mass production; and compared with traditional methods, the powder produced by the method contains no chlorine ion which can influence the performance of the powder, and the method needs no ethanol for washing, and no alkali for neutralization.

Description

technical field [0001] The invention belongs to the field of nanometer materials. The invention relates to the preparation of a zinc oxide and aluminum-doped zinc oxide nanometer material with gas-sensing performance and photoelectric performance. More specifically, it relates to the preparation of zinc oxide and aluminum-doped zinc oxide nanopowder materials that can be used in the fields of gas sensors, transparent conductive electrodes, catalysts, catalyst carriers and the like. Background technique [0002] Zinc oxide and aluminum-doped zinc oxide are important gas-sensing materials, transparent conductive electrode materials, catalysts and catalyst carrier materials. In recent years, the preparation of ZnO and Al-doped ZnO nanopowders has attracted more and more attention. This is mainly because the smaller the particle size of the powder, the larger the specific surface area of ​​the powder, so that the performance of the device prepared by using the powder is better...

Claims

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Application Information

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IPC IPC(8): C01G9/02B82Y30/00
Inventor 刘世民柴卫平
Owner DALIAN JIAOTONG UNIVERSITY
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