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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 energy saving, uniform size and controllable size

Inactive Publication Date: 2009-08-05
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 method with microwave heating 3 The nanodisk method has not been reported publicly

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
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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 th...

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 TEM and SEM images of the prod...

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 It...

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Abstract

The preparation method of the microwave-synthesized cerium fluoride nanodisk disclosed by the present invention comprises the following steps: first dissolving the complexing agent disodium edetate in deionized water, adding cerium nitrate under stirring to form a solution; then adjusting the pH of the solution When the value reaches 5.0-7.0, potassium fluoroborate is added under stirring to obtain a reaction system; then the reaction system is heated in a microwave oven under reflux for 30-60 minutes, cooled naturally, washed thoroughly with centrifugal separation and deionized water, collected and dried. The synthesis method of the invention has the characteristics of simple process, low cost, rapidity, energy saving and high efficiency. The prepared cerium fluoride nano disk has controllable and uniform size, an average diameter of 150-600 nanometers, and a thickness of 50-200 nanometers. The product is expected to be widely used in optics, optoelectronics, biomarkers, catalysis and other fields.

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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Patent Type & Authority Patents(China)
IPC IPC(8): C01F17/00C01B9/08B82B3/00
Inventor 陈卫祥马琳李辉
Owner ZHEJIANG UNIV
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