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Process for adopting ageing pretreatment technique to prepare one-dimensional nano ceric oxide fiber bundle

A technology of nano-cerium dioxide and fiber bundles, applied in chemical instruments and methods, inorganic chemistry, rare earth metal compounds, etc., can solve the problems of destroying the structure and shape of products, increasing material cycle and cost, etc.

Inactive Publication Date: 2011-07-27
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of templates or surfactants has the following disadvantages: First, the addition and removal of templates or surfactants will increase the cycle and cost of material preparation
Secondly, in the process of removing the template or surfactant, the physical and chemical methods used may destroy the structure and morphology of the product

Method used

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  • Process for adopting ageing pretreatment technique to prepare one-dimensional nano ceric oxide fiber bundle
  • Process for adopting ageing pretreatment technique to prepare one-dimensional nano ceric oxide fiber bundle
  • Process for adopting ageing pretreatment technique to prepare one-dimensional nano ceric oxide fiber bundle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The first step: aging the first mixed solution

[0045] Cerium nitrate Ce(NO 3 ) 3 ·6H 2O is added in the ethanol that mass percentage concentration is 99.7%, under the condition of 200r / min of stirring rate, after stirring for 30min, prepared Ce(NO 3 ) 3 ·6H 2 The molar concentration of O is the first mixed solution of 0.005mol / L;

[0046] The specific consumption is that 2.17g of cerous nitrate Ce (NO 3 ) 3 ·6H 2 O;

[0047] The second step: make the second mixture

[0048] Add urea CO(NH 2 ) 2 Mix well to obtain CO(NH 2 ) 2 The molar concentration is the second mixed solution of 0.01mol / L;

[0049] In this step, there are no restrictions on the mixing, just ensure that no CO(NH 2 ) 2 particles. Added 0.60g of urea CO(NH 2 ) 2 ;

[0050] Step 3: Solvothermal Reaction

[0051] Pour the second mixed solution into a stainless steel reactor with a polytetrafluoroethylene liner, then place the reactor at a temperature of 150°C, and react for 72 hours ...

Embodiment 2

[0060] The first step: aging the first mixed solution

[0061] Cerium nitrate Ce(NO 3 ) 3 ·6H 2 O is added in the ethanol that mass percent concentration is 99.7%, under the condition of 100r / min of stirring rate, after stirring for 50min, prepared Ce(NO 3 ) 3 ·6H 2 The molar concentration of O is the first mixed solution of 0.005mol / L;

[0062] Dosage: 1.50 g of cerous nitrate Ce (NO 3 ) 3 ·6H 2 O;

[0063] The second step: make the second mixture

[0064] Add urea CO(NH 2 ) 2 CO(NH 2 ) 2 The molar concentration is the second mixed solution of 0.01mol / L;

[0065] Dosage: 0.41g of urea CO(NH 2 ) 2 ;

[0066] Step 3: Solvothermal Reaction

[0067] Pour the second mixed solution into a stainless steel reaction kettle with polytetrafluoroethylene lining, then place the reaction kettle at a temperature of 150°C, and react for 24 hours to obtain a precipitate;

[0068] Step Four: Wash and Dry

[0069] After the precipitate was washed 5 times with deionized water...

Embodiment 3

[0073] The first step: aging the first mixed solution

[0074] Cerium nitrate Ce(NO 3 ) 3 ·6H 2 O is added in the ethanol that mass percent concentration is 99.7%, under the condition of 150r / min of stirring rate, after stirring for 40min, prepared Ce(NO 3 ) 3 ·6H 2 The molar concentration of O is the first mixed solution of 0.005mol / L;

[0075] Dosage: 3.0 g of cerous nitrate Ce (NO 3 ) 3 ·6H 2 O;

[0076] The second step: make the second mixture

[0077] Add urea CO(NH 2 ) 2 CO(NH 2 ) 2 The molar concentration is the second mixed solution of 0.01mol / L;

[0078] Dosage: 0.83g of urea CO(NH 2 ) 2 ;

[0079] Step 3: Solvothermal Reaction

[0080] Pour the second mixed solution into a stainless steel reaction kettle lined with polytetrafluoroethylene, then place the reaction kettle at a temperature of 150°C, and react for 48 hours to obtain a precipitate;

[0081] Step Four: Wash and Dry

[0082] After the precipitate was washed 4 times with deionized water, ...

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Abstract

The invention discloses a one-dimensional nano ceric oxide fiber bundle and a process adopting ageing pretreatment technique to prepare the same. The one-dimension nano ceric oxide fiber bundle which is of bundle polycrystalline structure is 10nm-70nm in diameter and 100nm-800nm in length. The process for preparing the one-dimensional nano ceric oxide fiber bundle includes steps of preparing ceric solution via ageing treatment, adding precipitant into the ceric solution, and finally obtaining the one-dimensional nano ceric oxide fiber bundle after solvothermal reaction at a certain temperature. The one-dimensional nano ceric oxide fiber bundle prepared by the process is smooth and regular in appearance and fine in dispensability. The preparation process can be completed without any template or surface active agent, and the preparation technique is simple and easy in implement, low in cost, excellent in repeatability and easy for industrial production, and is environment-friendly.

Description

technical field [0001] The invention relates to a chemically synthesized fiber bundle product, more particularly a one-dimensional nanometer ceria fiber bundle. The one-dimensional nano ceria fiber bundle is prepared by combining aging pretreatment and solvothermal. Background technique [0002] In recent years, more and more attention has been paid to the preparation of nanomaterials. This is because when the material scale reaches the nanometer range, many new properties and new laws will appear, such as quantum size effect, small size effect, surface effect and macroscopic tunnel effect. These properties and rules cause the mechanical, thermal, optical, electrical, magnetic and other properties of nanomaterials to be significantly different from those of bulk materials. The basic units of nanomaterials can be divided into zero-dimensional, one-dimensional, two-dimensional and three-dimensional. Among them, one-dimensional nanomaterials, such as nanofibers, nanotubes, n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F17/00C30B7/14C30B29/16C30B29/62
Inventor 李锐星傅聪
Owner BEIHANG UNIV