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A kind of preparation method of copper vanadate

A technology of copper vanadate and sodium metavanadate, which is applied in the electrolysis process and electrolysis components, etc., can solve the problems of difficult control of the shape of the target product, short reaction time, long reaction time, etc. Large, single-ingredient effects

Active Publication Date: 2018-08-17
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In order to solve the problems of long reaction time in the preparation process of copper vanadate in the prior art, relatively high requirements for experimental conditions, and difficulty in controlling the shape of the target product, the object of the present invention is to provide a method for preparing copper vanadate, which reacts Short time, easy separation, single anolyte without other additives, no impurities in the product, simple operation and easy industrial production

Method used

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Embodiment 1

[0029] A preparation method for copper vanadate, specifically comprising the steps of:

[0030] (1) With the copper sheet as the anode, the glassy carbon electrode as the cathode, the 0.1mol / L sodium metavanadate aqueous solution as the anolyte, the 0.1mol / L hydrochloric acid solution as the catholyte, and the cationic membrane as the diaphragm double In the chamber electrolyzer, the constant current electrolysis is carried out at a temperature of 70°C, and the current density is 10mA / cm 2 ;

[0031] (2) After electrolysis, filter the product obtained on the anode with deionized water while cleaning it, and control the temperature of the filtered filter cake at 80°C for 4 hours. After drying, cool it down to room temperature naturally. After drying, In the air atmosphere, the temperature was raised to 500°C at a heating rate of 2°C / min for high-temperature calcination for 3 hours. After the calcination, it was naturally cooled to room temperature to obtain pure copper vanadat...

Embodiment 2

[0034] A kind of preparation method of copper vanadate, concrete steps are as follows:

[0035] (1) Take the copper sheet as the anode, the glassy carbon electrode as the cathode, the 0.2mol / L sodium metavanadate aqueous solution as the anolyte, the 0.2mol / L sodium chloride solution as the catholyte, and the cationic membrane as the diaphragm In the dual-chamber electrolytic cell, the constant current electrolysis is carried out under the condition of temperature of 50 °C, and the current density is 30mA / cm 2 ;

[0036] (2) After electrolysis, filter the product obtained on the anode with deionized water while washing, and control the temperature of the filtered filter cake at 90°C for 4 hours. After drying, cool it down to room temperature naturally. After drying, Under air atmosphere, heat up to 600°C at a rate of 5°C / min for high-temperature calcination for 3 hours, and then cool naturally to room temperature after calcination to obtain pure copper vanadate.

[0037] Adop...

Embodiment 3

[0039] A kind of preparation method of copper vanadate, concrete steps are as follows:

[0040] (1) With red copper as anode, glassy carbon electrode as cathode, 0.3mol / L sodium metavanadate aqueous solution as anolyte, 0.3mol / L hydrochloric acid solution as catholyte, and double chamber with cationic membrane as diaphragm In the electrolytic cell, the constant current electrolysis is carried out at a temperature of 20°C, and the current density is 50mA / cm 2 ;

[0041](2) After electrolysis, filter the product obtained on the anode with deionized water while cleaning it, and control the temperature of the filtered filter cake at 80°C to dry for 4 hours. After drying, naturally cool to room temperature. After drying, In the air atmosphere, the temperature was raised to 400°C at a heating rate of 5°C / min for high-temperature calcination for 5 hours. After the calcination, it was naturally cooled to room temperature to obtain pure copper vanadate.

[0042] Adopt the Hitachi S-3...

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Abstract

The invention discloses a preparation method of vanadic acid copper. The preparation method comprises the steps that firstly, by the adoption of the direct current electrolysis mode, vanadic acid copper precursors of different structures and with different particle sizes are prepared by controlling the current density, electrolyte concentration and temperature; then products obtained in anode liquor are collected, filtered, washed and dried; and finally, the temperature is increased to 400-600 DEG C at the speed of 2-5 DEG C / min in the air atmosphere, high-temperature roasting is conducted for 3-5 h, and the high-purity and high-cleanliness vanadic acid copper is obtained, specifically, the structural composition of the vanadic acid copper is Cu<3>(VO<4>)<2>. According to the preparation method, by controlling the corresponding conditions, main morphological structures of the obtained product are spherical particles and micron rod-like structures.

Description

technical field [0001] The invention relates to the technical field of preparation of new energy materials, in particular to a method for preparing copper vanadate. Background technique [0002] In recent years, transition metal vanadates (MVO), such as silver vanadate, bismuth vanadate, copper vanadate, nickel vanadate, etc., have shown excellent properties in optics, electricity, and magnetism due to their unique spatial structure. has received extensive attention from researchers. [0003] As an important class of functional materials, copper vanadate has been widely used in the fields of optics, electricity and magnetism. In recent years, its excellent electrochemical performance has gradually attracted the attention of researchers. During the discharge process, due to the Cu 2+ and V 5+ It can interact with multiple lithium ions, so this type of material shows a high discharge specific capacity. According to the different contents of Cu, V and O in the system, its ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/00
CPCC25B1/00
Inventor 张全生张立恒张道明任桢霍孟飞周敦凡
Owner SHANGHAI INST OF TECH
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