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Preparation method of three-dimensional electrocatalytic composite electrode plate

A composite electrode and three-dimensional electric technology, which is applied in chemical instruments and methods, solid-state chemical plating, water/sludge/sewage treatment, etc., can solve the problems of low current utilization rate and unreasonable economy, and avoid impurities and Uncertain factors, large application prospects, and the effect of mild preparation conditions

Inactive Publication Date: 2015-04-29
HIGH TECH RES INST NANJING UNIV LIANYUNGANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Electrochemical water treatment technology has been produced for more than 40 years, but the main reason why it has not been widely used is that the current utilization rate is not high, which is unreasonable economically.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A method for preparing a three-dimensional electrocatalytic composite electrode plate, comprising the steps of:

[0018] S1: Titanium substrate pretreatment, using 99% ultra-high-purity metal titanium plate as the substrate, polishing the surface of the substrate with sandpaper to make the surface of the titanium substrate smooth, ultrasonically cleaning with distilled water, using NaOH, NaHCO 3 and Na 3 PO at 95-100°C 4 Soak the matrix with mixed lye for 30 minutes, then soak the matrix with a mixed acid solution of hydrofluoric acid, nitric acid and sulfuric acid for 60 minutes;

[0019] S2: Colloid configuration, configure 2-8% rare earth organic solution, the selected rare earth is rare earth containing La and Ce elements, and use propanol as organic solvent, then add SnCl 4 to the organic solution to form a mixed solution, and let it stand;

[0020] S3: Apply the mixed solution configured in S2 on the surface of the substrate of S1. The coating needs to be dried at...

Embodiment 2

[0023] A method for preparing a three-dimensional electrocatalytic composite electrode plate, comprising the steps of:

[0024] S1: Titanium substrate pretreatment, using 99% ultra-high-purity metal titanium plate as the substrate, polishing the surface of the substrate with sandpaper to make the surface of the titanium substrate smooth, ultrasonically cleaning with distilled water, using NaOH, NaHCO 3 and Na 3 PO at 95-100°C 4 Soak the matrix with mixed lye for 30 minutes, then soak the matrix with a mixed acid solution of hydrofluoric acid, nitric acid and sulfuric acid for 60 minutes;

[0025] S2: Colloid configuration, configure 2-8% rare earth organic solution, the selected rare earth is rare earth containing Pr and Sm elements, and use propanol as organic solvent, then add SnCl 4 to the organic solution to form a mixed solution, and let it stand;

[0026] S3: Apply the mixed solution configured in S2 on the surface of the substrate of S1. The coating needs to be dried at...

Embodiment 3

[0029] A method for preparing a three-dimensional electrocatalytic composite electrode plate, comprising the steps of:

[0030] S1: Titanium substrate pretreatment, using 99% ultra-high-purity metal titanium plate as the substrate, polishing the surface of the substrate with sandpaper to make the surface of the titanium substrate smooth, ultrasonically cleaning with distilled water, using NaOH, NaHCO 3 and Na 3 PO at 95-100°C 4 Soak the matrix with mixed lye for 30 minutes, then soak the matrix with a mixed acid solution of hydrofluoric acid, nitric acid and sulfuric acid for 60 minutes;

[0031] S2: Colloid configuration, configure 2-8% rare earth organic solution, the selected rare earth is rare earth containing Pr and Gd elements, and use propanol as organic solvent, then add SnCl 4 to the organic solution to form a mixed solution, and let it stand;

[0032] S3: Apply the mixed solution configured in S2 on the surface of the substrate of S1. The coating needs to be dried at...

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Abstract

The invention discloses a preparation method of a three-dimensional electrocatalytic composite electrode plate. The preparation method comprises the following steps: pretreating a titanium matrix, taking a metal titanium plate with ultrahigh purity as a substrate, grinding the surface of the substrate by using abrasive paper, cleaning with distilled water, soaking the matrix for 30 minutes in alkaline liquid with the temperature of 95-100 DEG C, and soaking the matrix for 30-60 minutes by using acid liquid. The preparation method disclosed by the invention has the advantages that the preparation condition is relatively mild, the fussy coating and thermal-decomposition procedures are omitted, so that impurities and uncertain factors caused in the manual coating process are avoided; the three-dimensional structure electrode can be used for preparing an electrode with strong selectivity by the proportion of active components, has high electrocatalytic activity and has large application prospect in the aspects of treatment of ammonia-nitrogen waste water and other waste water.

Description

technical field [0001] The invention relates to a method for preparing an electrode plate, in particular to a method for preparing a three-dimensional electrocatalytic composite electrode plate doped with rare earth elements. technical background [0002] At present, DSA electrodes are increasingly produced in the electrochemical industry (such as chlorate production, electrometallurgy extraction of non-ferrous metals, electroplating production, organic electrochemical synthesis, sewage treatment in the chlor-alkali industry, various industries and civil industries, etc.) . The preparation methods of DSA electrodes mainly include thermal decomposition method, electrochemical precipitation method, sol-gel method and so on. The most technically used method is thermal decomposition. The precursor compound corresponding to the target oxide is mixed according to a certain ratio, dissolved in a certain solvent to make a coating liquid, and then evenly painted on the surface of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C20/08C02F1/461
Inventor 徐根华刘茂跃
Owner HIGH TECH RES INST NANJING UNIV LIANYUNGANG