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Titanium-based beta-MnO2 composite coating anode and preparation method thereof

A composite coating and titanium-based technology, which is applied in coatings, metal material coating processes, electrodes, etc., can solve the problems of high cell voltage, short life, and restrictions on wide application, and achieve cell voltage reduction, conductivity improvement, overcoming costly effects

Active Publication Date: 2018-10-19
KUNMING UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problems of high cell voltage and short service life of this type of coating in actual use limit its large-scale application.
In summary, DSA with a single component and structure often has obvious advantages and disadvantages, which limits its wide application in industry.

Method used

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  • Titanium-based beta-MnO2 composite coating anode and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Titanium-based β-MnO for electrolytic extraction of metals in ammonium chloride solution system 2 The preparation method of composite coating anode, the steps are as follows:

[0025] a. Titanium substrate pre-treatment: The titanium mesh substrate with a thickness of 2 mm and a diamond-shaped mesh diameter of 6 mm is first sandblasted with a sandblasting machine to improve its surface roughness, and then the titanium mesh substrate is degreased, descaled, Pickling activation treatment, specifically put the titanium mesh substrate into a NaOH solution with a mass concentration of 20% to remove oil for 60 minutes, then soak it in the pickling solution for 3 minutes to remove the oxide film, and finally put it into a HCl solution with a mass concentration of 30% Boil for 2 hours, take it out, rinse it repeatedly with deionized water and soak it in an oxalic acid solution with a mass concentration of 2% for later use; the components and volume ratio of the pickling solutio...

Embodiment 2

[0031] Titanium-based β-MnO for electrolytic extraction of metals in ammonium chloride solution system 2 The preparation method of composite coating anode, the steps are as follows:

[0032] a. Titanium substrate pre-treatment: the titanium mesh substrate with a thickness of 6 mm and a rhombic mesh diameter of 10 mm is first sandblasted with a sandblasting machine to improve its surface roughness, and then the titanium mesh substrate is degreased, descaled, Pickling activation treatment, specifically, first put the titanium mesh substrate into a NaOH solution with a mass concentration of 30% to remove oil for 30 minutes, then soak it in the pickling solution for 2 minutes to remove the oxide film, and finally put it into an HCl solution with a mass concentration of 20% Boil for 2.5 hours, take it out, rinse it repeatedly with deionized water and soak it in an oxalic acid solution with a mass concentration of 2% for later use; the components and volume ratio of the pickling sol...

Embodiment 3

[0038] Titanium-based β-MnO for electrolytic extraction of metals in ammonium chloride solution system 2 The preparation method of composite coating anode, the steps are as follows:

[0039] a. Titanium substrate pretreatment: the titanium mesh substrate with a thickness of 1 mm and a circular mesh diameter of 5 mm is first sandblasted with a sandblasting machine to improve its surface roughness, and then the titanium mesh substrate is degreased and descaled , pickling activation treatment, specifically put the titanium mesh substrate into a NaOH solution with a mass concentration of 10% to remove oil for 90 minutes, then soak it in the pickling solution for 1 minute to remove the oxide film, and finally put it into an HCl solution with a mass concentration of 10% Boil in medium for 3 hours, take it out, rinse it repeatedly with deionized water and soak it in an oxalic acid solution with a mass concentration of 2% for subsequent use; the components and volume ratio of the pick...

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Abstract

The invention provides a titanium-based beta-MnO2 composite coating anode and a preparation method thereof. The anode comprises a titanium cladding copper conductive beam (1) which is provided with aconductive head (4), a titanium net plate (2) which is welded on the lower surface of a copper conducting beam, and silicon rubber cases (3) which sleeve two ends of the titanium cladding copper conductive beam, wherein the titanium net plate (2) comprises a titanium net base body, a gradient Ru-Ti-Sn-SbOx intermediate layer which coats the surface of the titanium net base body, and a beta-MnO2 composite surface activation layer which coats the surface of the intermediate layer. Compared with a traditional titanium-based heavy metal coating anode, the prepared anode has the advantages that theconductivity is obviously improved under the basis that an electrolytic cell structure, an electrolyte composition and operation regulations remain; the cell voltage can be reduced by 0.1V; the material cost can be decreased by 40%; the current efficiency can be increased by 1-3%; the shortage of high cost of a heavy metal oxide coating is overcome; and the anode can be widely applied to the electrolytic industry.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry and hydrometallurgy, and in particular relates to a titanium-based β-MnO used for the electrolytic extraction of metals in an ammonium chloride solution system 2 Composite coated anode plate and its preparation method. Background technique [0002] Titanium-based metal oxide anode is also called "dimensionally stable anode" (DimentionallyStableAnode, referred to as DSA), which generally uses metal titanium as the substrate, and coats the surface of the substrate with high catalytic activity by thermal decomposition, sol-gel or electrodeposition. Metal oxide coated electrodes. The research on DSA began in the middle of the 20th century, and has been widely used in electrochemical industries such as chlor-alkali industry, hydrometallurgy, electroplating, water treatment, electrosynthesis, and pollutant degradation. In the field of sewage treatment, the electrocatalytic oxidation method ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C7/02C23C18/08C23C18/12
CPCC23C18/08C23C18/1216C23C18/1241C23C28/345C23C28/36C25C7/02
Inventor 陈步明黄惠郭忠诚
Owner KUNMING UNIV OF SCI & TECH
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