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Method for auxiliary preparation of different-shape nano-cerium oxide with microwave

A nano-cerium oxide, microwave-assisted technology, applied in chemical instruments and methods, microwave heating, inorganic chemistry and other directions, can solve the problems of high preparation cost, complex process, poor controllability of nanomaterial particle size and morphology, etc. The effect of high practical value

Inactive Publication Date: 2009-08-19
JIANGSU POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These preparation methods usually have complex processes, high preparation costs, and poor controllability of the particle size and morphology of the prepared nanomaterials.

Method used

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  • Method for auxiliary preparation of different-shape nano-cerium oxide with microwave
  • Method for auxiliary preparation of different-shape nano-cerium oxide with microwave
  • Method for auxiliary preparation of different-shape nano-cerium oxide with microwave

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] According to the preparation process, Ce(NO 3 ) 3 Prepare a concentration of 0.01mol / l aqueous solution, add 0.01mol / l Ce(NO 3 ) 3 Add 100ml of aqueous solution, 100ml of ethylene glycol, 8ml of oleic acid, and 1.2ml of tert-butylammonium into a high-temperature reaction kettle with a sealing device and a liner coated with tetrafluoroethylene, without any stirring. After sealing the reaction kettle, heat it in a 2.5GHz household microwave oven for 10 minutes. The heating power of the microwave oven is 900w. After the reaction was finished, the resulting mixture was cooled to room temperature, and acetone with a volume of 700 ml was added to the mixture to wash away ethylene glycol and oleic acid, then ultrasonically treated for 5 min, and the mixture was centrifuged at a rate of 10,000 rpm 5min. The separated solid was washed with absolute ethanol, ultrasonically treated, centrifuged, and repeated 5 times to obtain a solid powder that was dried in a vacuum oven for...

Embodiment 2

[0031] According to the preparation process, Ce(NO 3 ) 3 Prepare a concentration of 0.05mol / l aqueous solution, add 0.05mol / l Ce(NO 3 ) 3 Add 100ml of aqueous solution, 120ml of ethylene glycol, 10ml of oleic acid, and 0.8ml of tert-butylammonium into a high-temperature reaction kettle with a sealing device and a liner coated with tetrafluoroethylene, without any stirring. After sealing the reaction kettle, heat it in a 2.5GHz household microwave oven for 10 minutes. The heating power of the microwave oven is 1000w. After the reaction is finished, the resulting mixture is cooled to room temperature, and acetone with a volume of 1000 ml of the mixture volume is added to the mixture to wash away ethylene glycol and oleic acid, then ultrasonically treated for 5 min, and the mixture is centrifuged at a rate of 10,000 rpm 7min. The separated solid was washed with absolute ethanol, ultrasonically treated and centrifuged, and repeated 5 times to obtain a solid powder that was dr...

Embodiment 3

[0033] According to the preparation process, Ce(NO 3 ) 3 Prepare a concentration of 0.1mol / l aqueous solution, add 0.1mol / lCe(NO 3 ) 3 Add 100ml of aqueous solution, 80ml of ethylene glycol, 8ml of oleic acid, and 0.6ml of tert-butylammonium into a high-temperature reaction kettle with a sealing device and a liner coated with a layer of tetrafluoroethylene, without any stirring. After sealing the reaction kettle, heat it in a 2.5GHz household microwave oven for 10 minutes. The heating power of the microwave oven is 600w. After the reaction is finished, the resulting mixture is cooled to room temperature, and acetone with a volume of 1000 ml of the mixture volume is added to the mixture to wash away ethylene glycol and oleic acid, then ultrasonically treated for 5 min, and the mixture is centrifuged at a rate of 10,000 rpm 7min. The separated solid was washed with absolute ethanol, ultrasonically treated and centrifuged, and repeated six times to obtain a solid powder that...

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Abstract

The invention belongs to the technical field of nanometer material preparation, in particular to a method for preparing nanometer cerium oxide with different appearances by microwave assistance. The method comprises the following steps: 1) preparing 0.01 to 0.1 mol / L aqueous solution of Ce(NO3)3 at room temperature; adding the Ce(NO3)3 aqueous solution, glycol, oleic acid and tert-butylamine into a high-temperature reaction kettle according to volume ratio of 100: (80-120) : (5-10) : (0.6-1.2) without any stirring; 2) sealing and placing the high-temperature reaction kettle in a microwave environment to be heated for 5 to 10 minutes with microwave power of between 100 and 1,000 watt; and 3) after reaction of step (2) is finished, cooling the obtained mixture till room temperature, adding acetone accounting for 3 to 5 times of the mixture by volume into the mixture to wash the glycol and the oleic acid, centrifugalizing the mixture after ultrasonic treatment, washing the centrifugalized solid by absolute ethyl alcohol, carrying out ultrasonic treatment and centrifugalization on the solid for 5 to 6 times, and drying the obtained solid powder to obtain the cerium oxide nanometer material. The method has the advantages of low cost, simple process and good controllability.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a microwave-assisted method for preparing nano-cerium oxides with different shapes. Background technique [0002] Due to the special structure of nanoparticles, nanomaterials are quite different from traditional materials in some properties (such as optics, electricity, etc.), and have been widely used in the fields of electronics, optics, chemical ceramics, biology and medicine. Nano-oxide is an important part of nano-materials, so its preparation, structure, performance and application have become one of the hotspots of researchers from all over the world. Cerium oxide is an extremely versatile light rare earth oxide with N-type semiconductor properties. It is widely used in fuel cells, luminescent materials, glass decolorization clarifiers, catalysts, electronic ceramics, ultraviolet absorbing materials, and photocatalysis. Photocatalytic oxidatio...

Claims

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Application Information

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IPC IPC(8): C01F17/00H05B6/64
Inventor 陶宇陶国良吴海平蔡金锅龚方红刘春林王辉
Owner JIANGSU POLYTECHNIC UNIVERSITY
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