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Preparation method of yolk-shell-structured CrF3.3H2O

A technology of crf3·3h2o and shell structure is applied in the field of preparation of egg yolk-shell structure CrF3·3H2O, which can solve problems such as no egg yolk-shell structure, and achieve the effects of simple method, low cost and easy operation.

Active Publication Date: 2018-01-02
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As far as literature research is concerned, the currently prepared chromium fluoride and its hydrates are mainly irregular particles, and no yolk-shell structure of CrF 3 ·3H 2 O report

Method used

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  • Preparation method of yolk-shell-structured CrF3.3H2O
  • Preparation method of yolk-shell-structured CrF3.3H2O
  • Preparation method of yolk-shell-structured CrF3.3H2O

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Experimental program
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Effect test

Embodiment 1

[0021] Weigh CrCl 3 ·6H 2 O powder 0.5g, KF 2H 2 0.53g of O powder was mixed with 11g of n-octane, 2.5g of n-butanol, 1.5ml of deionized water and 3g of CTAB powder respectively to form a mixed solution. Ultrasonic the two prepared microemulsions for 10 minutes, then continue to stir for 20 minutes and put KF·2H 2 O solution was added to CrCl 3 ·6H 2 The reaction was carried out in O, and the reaction time was 5 minutes, and the process was stirred all the time. After the reaction is completed, add a mixed solution of chloroform and methanol (wherein the volume ratio of chloroform and methanol is equal to 1), after which there will be a green precipitate in the beaker, and after centrifugation and cleaning, the egg yolk-shell structure CrF 3 ·3H 2 O spherical particles.

Embodiment 2

[0023] Weigh CrCl 3 ·6H 2 O powder 0.5g, KF 2H 2 O powder 0.53g and n-octane 11g, n-butanol 2.5g, deionized water 1.5ml, CTAB powder 2g form a mixed solution respectively. Ultrasonic the two prepared microemulsions for 10 minutes, then continue to stir for 20 minutes and put KF·2H 2 O solution was added to CrCl 3 ·6H 2 The reaction was carried out in O, and the reaction time was 10 minutes, and the process was stirred all the time. After the reaction is completed, add a mixed solution of chloroform and methanol (wherein the volume ratio of chloroform and methanol is equal to 1), after which there will be a green precipitate in the beaker, and after centrifugation and cleaning, the egg yolk-shell structure CrF 3 ·3H 2 O spherical particles.

Embodiment 3

[0025] Weigh CrCl 3 ·6H 2 O powder 0.5g, KF 2H 2 O powder 0.53g and n-octane 11g, n-butanol 2.5g, deionized water 1.5ml, CTAB powder 2g form a mixed solution respectively. Ultrasonic the two prepared microemulsions for 10 minutes, then continue to stir for 20 minutes and put KF·2H 2 O solution was added to CrCl 3 ·6H 2 The reaction was carried out in O, and the reaction time was 20 minutes, and the process was stirred all the time. After the reaction is completed, add a mixed solution of chloroform and methanol (wherein the volume ratio of chloroform and methanol is equal to 1), after which there will be a green precipitate in the beaker, and after centrifugation and cleaning, the egg yolk-shell structure CrF 3 ·3H 2 O spherical particles.

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Abstract

The invention relates to a preparation method of yolk-shell-structured CrF3.3H2O, belonging to the field of functional nanomaterials. The preparation method comprises the following process flows: (1)respectively preparing a microemulsion from CrCl3.6H2O, a surfactant, a cosurfactant, octane and deionized water and a microemulsion from KF.2H2O, a surfactant, a cosurfactant, octane and deionized water in certain proportions; (2) carrying out ultrasonic treatment on the two prepared microemulsions for 5-30 minutes, continuously stirring for 5-30 minutes, and adding a KF.2H2O solution into CrCl3.6H2O, and stirring to react for 5-120 minutes; and (3) after the reaction is finished, adding a mixed solution of trichloromethane and methanol, and centrifuging and washing green precipitates generated in a beaker, so as to obtain yolk-shell-structured CrF3.3H2O spherical particles. According to the preparation method, the yolk-shell-structured CrF3.3H2O spherical particles can be prepared by controlling the reaction conditions, the process is simple, the method is novel, the production period is short, the dispersity of power is good, and the preparation method can be popularized in a largescale.

Description

technical field [0001] The invention belongs to the field of functional nanomaterials, in particular to an egg yolk-shell structure CrF 3 ·3H 2 O preparation method. Background technique [0002] After entering the 21st century, environmental problems and energy crisis have become common problems faced by mankind. In order to face these problems and find a way of sustainable development, the development and utilization of renewable energy have been paid more and more attention by various countries, and rechargeable secondary batteries have also been greatly developed. Lithium-ion batteries have the advantages of high energy density, high power density, long cycle life, high operating voltage and wide operating temperature range, no memory effect and good safety performance, and have been widely used in portable electronic devices. The performance of battery materials plays a decisive role in the development of batteries. Therefore, looking for battery materials with stab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G37/04
Inventor 李平刘志伟王伟赵汪万琦孙冬曲选辉秦明礼
Owner UNIV OF SCI & TECH BEIJING
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