Method for microwave synthesis of cerium fluoride nano disk

A technology of microwave synthesis and cerium fluoride, applied in chemical instruments and methods, nanotechnology, nanotechnology, etc., to achieve the effects of size control, energy saving efficiency, and uniform size

Inactive Publication Date: 2008-05-07
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, rapid synthesis of cerium fluoride (CeF) by chemical liquid-phase meth

Method used

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  • Method for microwave synthesis of cerium fluoride nano disk
  • Method for microwave synthesis of cerium fluoride nano disk
  • Method for microwave synthesis of cerium fluoride nano disk

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 4 mmol of disodium ethylenediamine tetraacetate (Na 2 h 2 EDTA) was dissolved in 100ml of deionized water, and a few drops of concentrated ammonia were added to dissolve it completely. Then add 2mmol cerium nitrate (Ce(NO 3 ) 3 ) to form a uniform solution. At this time, the concentration of cerium ions in the solution was 0.02M, and the molar ratio of complexing agent to cerium ions was 2.0: 1; the pH value of the reaction system was adjusted to 6.0 with dilute nitric acid solution. Then add molar ratio KBF under vigorous stirring 4 / C 3+ Potassium fluoroborate is 4.0:1. The reaction solution was transferred into a round bottom flask, placed in a household microwave oven with a reflux device, heated for 30 minutes, and then the reaction system was naturally cooled to room temperature. The resulting product was collected and dried after centrifugation and deionized water washing to obtain cerium fluoride (CeF 3 )product. CeF 3 The X-ray diffraction pattern of t...

Embodiment 2

[0023] 4 mmol of disodium ethylenediamine tetraacetate (Na 2 h 2 EDTA) was dissolved in 100ml of deionized water, and a few drops of concentrated ammonia were added to dissolve it completely. Then add 2mmol cerium nitrate (Ce(NO 3 ) 3 ) to form a uniform solution. At this time, the concentration of cerium ions in the solution was 0.02M, and the molar ratio of complexing agent to cerium ions was 2.0: 1; the pH value of the reaction system was adjusted to 6.0 with dilute nitric acid solution. Then add molar ratio KBF under vigorous stirring 4 / C 3+ 4.0:1 potassium fluoroborate (KBF 4 ). The reaction solution was transferred into a round bottom flask, placed in a household microwave oven with a reflux device, heated for 60 minutes, and then the reaction system was naturally cooled to room temperature. The resulting product was collected by centrifugation and washed thoroughly with deionized water and dried to obtain CeF 3 product. CeF 3 The transmission electron microsc...

Embodiment 3

[0025] 4 mmol of disodium ethylenediamine tetraacetate (Na 2 h 2 EDTA) was dissolved in 100ml of deionized water, and a few drops of concentrated ammonia were added to dissolve it completely. Then add 2mmol cerium nitrate (Ce(NO 3 ) 3 ) to form a uniform solution. At this time, the concentration of cerium ions in the solution was 0.02M, and the molar ratio of complexing agent to cerium ions was 2.0: 1; the pH value of the reaction system was adjusted to 6.0 with dilute nitric acid solution. Then add molar ratio KBF under vigorous stirring 4 / C 3+ Potassium fluoroborate is 4.0:1. The reaction solution was transferred into a round bottom flask, placed in a household microwave oven with a reflux device, heated for 45 minutes, and then the reaction system was naturally cooled to room temperature. The resulting product was collected by centrifugation and washed thoroughly with deionized water and dried to obtain CeF 3 product. TEM and SEM observations revealed that CeF 3 I...

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Abstract

The invention discloses a preparative method for synthesizing cerium fluoride nanometer disc by microwave, the preparative method comprises the steps as follows: the complexing agent of EDTA Disodium is resolved into deionized water, and cerium nitrate is added to acquire solution under the mixing; the PH value of the solution is adjusted to 5.0 to 7.0, potassium fluoborate is added to make the reaction system under the mixing; the reaction system is heated in a microwave oven under backflow condition for 30 to 60 minute, and cooled naturally, separated by the centrifugation and washed fully with deionized water, collected and dried. The synthesizing method disclosed in the invention has the advantages of simple technique, low cost, quick process for saving energy, and high efficiency. The produced cerium fluoride nanometer disc has controllable and even size, with the average diameter of 150 to 600 nanometers and the thickness of 50 to 200 nanometers, therefore, the product is promising for wide application in the fields such as optics, photoelectronics, biologic marking and catalyzing, etc.

Description

technical field [0001] The invention relates to the preparation of inorganic nanometer materials, in particular to the preparation method of rare earth compound cerium fluoride nanomaterials. Background technique [0002] Due to the 4f electronic properties of rare earth elements, their elements and their compounds have many special physical, chemical, electronic and optical properties, so rare earths and their compounds are widely used in the fields of electronics, magnetic materials, energy storage materials, catalysis and tribology Has a wide range of applications. my country is rich in rare earth resources, and the research and preparation of rare earth compound nanomaterials has important scientific significance and application value for deepening the utilization of rare earth resources and expanding their new application fields. Rare earth nanocrystals with controllable morphology and size have attracted intense attention due to their potential applications in optics,...

Claims

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Application Information

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IPC IPC(8): C01F17/00C01B9/08B82B3/00
Inventor 陈卫祥马琳李辉
Owner ZHEJIANG UNIV
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