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Method for electrolyzing ferric oxide by using deep eutectic solvent to prepare ferroferric oxide

A technology of triiron tetroxide and low eutectic solvent, applied in the electrolysis process, electrolysis components and other directions, can solve the problems of long process flow, complicated operation, strict equipment requirements, etc., and meet the requirements of simple preparation process, wide source and equipment low effect

Inactive Publication Date: 2014-12-24
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] Aiming at the problems of long process flow, complicated operation and strict requirements on equipment in the prior art for preparing ferric oxide mentioned above, the present invention discloses a method for preparing ferric oxide by electrolyzing ferric oxide with a deep eutectic solvent

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  • Method for electrolyzing ferric oxide by using deep eutectic solvent to prepare ferroferric oxide

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Embodiment 1

[0018] The method for preparing ferric oxide by electrolyzing ferric oxide with a deep eutectic solvent, the specific steps are as follows:

[0019] (1) Preparation of cathode sheet: mix ferric oxide, PVA binder and pore-forming agent, press to form, and then bake at 800°C for 3 hours to obtain cathode sheet, wherein the pore-forming agent is ammonium bicarbonate, three The addition amount of ferric oxide, PVA binder and pore forming agent are 0.60g, 0.10g, 0.14g respectively;

[0020] (2) Configure a deep eutectic solvent: mix choline chloride and ethylene glycol at a molar ratio of 1:1, heat and stir at 80°C to form a deep eutectic solvent;

[0021] (3) With graphite as the anode, the cathode sheet prepared in step (1) is used as the cathode, and DC electrolysis is performed in the deep eutectic solvent prepared in step (2). During this process, the cell voltage is controlled to 2.5V and the electrolyte temperature is Electrolyze for 20 hours at 80°C, the distance between t...

Embodiment 2

[0025] The method for preparing ferric oxide by electrolyzing ferric oxide with a deep eutectic solvent, the specific steps are as follows:

[0026] (1) Preparation of cathode sheet: mix ferric oxide, PVA binder and pore-forming agent, press to form, and then bake at 800°C for 3 hours to obtain cathode sheet, wherein the pore-forming agent is polyvinyl alcohol, three The addition amount of ferric oxide, PVA binder and pore forming agent are 0.65g, 0.11g, 0.15g respectively;

[0027] (2) Configure a deep eutectic solvent: mix choline chloride and ethylene glycol at a molar ratio of 1:2, heat and stir at 60°C to form a deep eutectic solvent;

[0028] (3) With graphite as the anode, the cathode sheet prepared in step (1) is used as the cathode, and direct current electrolysis is performed in the deep eutectic solvent prepared in step (2). During this process, the cell voltage is controlled to 2.8V and the electrolyte temperature is Electrolyze for 24 hours at 50°C, the distance ...

Embodiment 3

[0031] The method for preparing ferric oxide by electrolyzing ferric oxide with a deep eutectic solvent, the specific steps are as follows:

[0032] (1) Preparation of cathode sheet: mix ferric oxide, PVA binder and pore-forming agent, press to form, and then bake at 800°C for 3 hours to obtain cathode sheet, wherein the pore-forming agent is polyethylene glycol, The addition amount of ferric oxide, PVA binder and pore forming agent is 0.80g, 0.15g, 0.32g respectively;

[0033] (2) Configure a deep eutectic solvent: mix choline chloride and ethylene glycol at a molar ratio of 1:3, heat and stir at 70°C to form a deep eutectic solvent;

[0034] (3) With graphite as the anode, the cathode sheet prepared in step (1) is used as the cathode, and DC electrolysis is performed in the deep eutectic solvent prepared in step (2). During this process, the cell voltage is controlled to 2.0V and the electrolyte temperature is Electrolyze for 14 hours at 60°C and the distance between the ca...

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Abstract

The invention relates to a method for electrolyzing ferric oxide by using a deep eutectic solvent to prepare ferroferric oxide and belongs to the technical fields of wet metallurgy and materials. The method comprises the following steps: preparing a cathode plate, namely mixing ferroferric oxide with PVA binder and a pore-forming agent; pressing and molding, and then roasting at 800 DEG for 3 hours to prepare the cathode plate; preparing a deep eutectic solvent, namely mixing choline chloride with ethylene glycol evenly to form the deep eutectic solvent; carrying out direct-current electrolysis on graphite serving as an anode and the prepared cathode plate serving as a cathode in the deep eutectic solvent so that ferric oxide on the cathode plate is reduced into ferroferric oxide; and carrying out ultrasonic washing and vacuum drying on the obtained ferroferric oxide by using ethanol and distilled water, so as to obtain ferroferric oxide. The method is short in technological process, simple in preparation method, low in energy consumption and low in demands on equipment.

Description

technical field [0001] The invention relates to a method for preparing ferric oxide by electrolyzing ferric oxide with a deep eutectic solvent, and belongs to the field of hydrometallurgy and material technology. Background technique [0002] Ferroferric oxide is a commonly used multifunctional magnetic material. In recent years, there have been many studies on nano-scale ferroferric oxide. It is often used as catalyst carrier, magnetic recording material and microwave absorbing material. It can also be used as magnetic fluid in medicine and aerospace, and as biological targeting material in medical and bioengineering, etc. It is of great scientific significance and practical value to study the new method for the preparation of ferroferric oxide. [0003] The traditional preparation methods of ferroferric oxide include co-precipitation method, hydrothermal (solvothermal) method, microemulsion method, and sol-gel (sol-gel) method. In recent years, some new preparation meth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/00
Inventor 华一新齐灿灿徐存英李坚李艳张启波介亚菲汝娟坚陈孔豪龚凯周忠仁
Owner KUNMING UNIV OF SCI & TECH
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