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Preparation process of titanium-based tin-iridium-series oxide coated electrode

A technology of oxide coating and preparation process, which is applied in the direction of metal material coating process, coating, water pollutants, etc., can solve the problem of low efficiency of electrochemical indirect oxidation current, prone to oxygen evolution reaction, short anode life, etc. problems, to achieve the effect of improving the electrochemical activity of chlorine analysis, low chlorine analysis potential and uniform surface area

Pending Publication Date: 2020-05-12
JIANGYIN ANCAN ELECTROCHEM EQUIP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] One is the electrode material that uses direct oxidation to degrade organic matter, in which Ti / PbO 2 and Ti / SnO 2 -Sb 2 o 5 The overall performance is the best, but Ti / PbO 2 It will dissolve during the electrolysis process, and the lead ions produced will cause pollution; Ti / SnO 2 -Sb 2 o 5 Anode life is short
[0004] The other is electrode materials for wastewater treatment using indirect oxidation, typically Ti / Ru and Ti / IrO in the chlor-alkali industry 2 Chlorine-analysis type anode, due to the low oxygen evolution potential of this type of electrode material, oxygen evolution reaction is more likely to occur in the process of treating low-concentration chlorine-containing wastewater, and the current efficiency of electrochemical indirect oxidation is not high

Method used

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  • Preparation process of titanium-based tin-iridium-series oxide coated electrode
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  • Preparation process of titanium-based tin-iridium-series oxide coated electrode

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Embodiment 1

[0033] like Figures 1 to 4 Shown is an embodiment of the preparation process of a titanium-based tin-iridium oxide coating electrode of the present invention, including electrode substrate production, coating solution preparation and electrode substrate coating treatment; wherein, the electrode substrate is titanium plate, the preparation of the coating solution is a mixed solution prepared in a predetermined ratio of isopropanol and hydrochloric acid as a solvent, respectively dissolving H 2 IrCl 6 ·6H 2 O, SnCl 4 ·5H 2 O, RuCl 3 while obtaining a predetermined concentration of H 2 IrCl 6 ·6H 2 Alcohol solution of O, SnCl 4 ·5H 2 Alcohol solution of O, RuCl 3 Alcohol solution, and three kinds of alcohol solutions are mixed to make the coating solution, and the molar ratio of elements in the coating solution is Sn:Ru:Ir=0.7:0~0.3:0~0.3 The electrode substrate coating treatment is to use the coating solution to sequentially coat, dry and sinter the electrode substr...

Embodiment 2

[0049] (a) One of the preparation schemes of Sn-Ru-Ir electrodes

[0050] According to the amount of elemental substances Sn:Ru:Ir=0.7:0:0.3, mix tin tetrachloride, ruthenium trichloride, and chloroiridate isopropoxide solution in proportion to prepare a coating solution, and use a small brush to apply it on the titanium substrate Brush evenly on the top of the paint, dry at 80°C for 10 minutes, let the solvent volatilize slowly, then place it in a resistance furnace, bake at 450°C for 10 minutes, cool to room temperature and do the next brushing, repeat brushing more than 10 times, Roasting for the last time for 1h.

[0051] (b) The second preparation scheme of Sn-Ru-Ir electrode

[0052] According to the amount of elemental substances Sn: Ru: Ir = 0.7: 0.01: 0.29, mix tin tetrachloride, ruthenium trichloride, and chloroiridate isopropoxide solution in proportion to prepare a coating solution, and use a small brush on the titanium substrate Brush evenly on the top of the pa...

Embodiment 3

[0062] The titanium-based tin-iridium series oxide coating electrode prepared in above-mentioned embodiment 1 and 2 is tested, and its chlorine evolution linear voltammetry curve is measured as follows: figure 1 As shown, the measured oxygen evolution linear voltammetry curve is as follows figure 2 As shown, the measured strengthening life curve is as follows image 3 shown.

[0063] The test results of the prepared titanium-based tin-iridium oxide coating electrode show that: with the increase of Ru content, the chlorine evolution reaction current first increases and then decreases, while the oxygen evolution reaction current decreases continuously. The addition of Ru can improve the electrochemical activity of chlorine evolution of the tin-iridium oxide electrode and inhibit the occurrence of oxygen evolution reaction; when the Ru content is 0.05, the chlorine evolution current is the largest, and with the increase of the chlorine evolution current, the change of the chlor...

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Abstract

The invention relates to the technical field of coated electrodes for sewage treatment, and discloses a preparation process of a titanium-based tin-iridium-series oxide coated electrode. The preparation process comprises the steps of preparation of an electrode substrate, preparation of a coating solution and coating treatment of the electrode substrate. The electrode substrate is a titanium plate. The coating solution is prepared by taking a mixed solution prepared from isopropanol and hydrochloric acid according to a preset ratio as a solvent, respectively dissolving H2IrCl6.6H2O, SnCl4.5H2Oand RuCl3 to obtain an alcoholic solution of H2IrCl6.6H2O, an alcoholic solution of SnCl4.5H2O and an alcoholic solution of RuCl3 with preset concentrations, and mixing the three alcoholic solutionsin an element molar ratio of Sn to Ru to Ir in the coating solution of 0.7: (0-0.3): (0-0.3). The surface area of a coating on the surface of the electrode is large and uniform, the chlorine evolutionpotential of the electrode is low, the oxygen and chlorine potential difference of the electrode is large, the chlorine evolution efficiency of the electrode is high, the electrode strengthening service life of the electrode is long, and a good electrode material is provided for indirect oxidation treatment of wastewater.

Description

technical field [0001] The invention relates to the technical field of coated electrodes for sewage treatment, in particular to a preparation process of a titanium-based tin-iridium series oxide coated electrode. Background technique [0002] In the prior art, the electrode materials used in the wastewater treatment process fall into the following two categories. [0003] One is the electrode material that uses direct oxidation to degrade organic matter, in which Ti / PbO 2 and Ti / SnO 2 -Sb 2 o 5 The overall performance is the best, but Ti / PbO 2 It will dissolve during the electrolysis process, and the lead ions produced will cause pollution; Ti / SnO 2 -Sb 2 o 5 Anode life is short. [0004] The other is electrode materials for wastewater treatment using indirect oxidation, typically Ti / Ru and Ti / IrO in the chlor-alkali industry 2 Chlorine-analysis type anode, due to the low oxygen evolution potential of this type of electrode material, oxygen evolution reaction is mor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C23C18/12
CPCC02F1/46109C02F2001/46138C02F2101/30C23C18/1216
Inventor 马培岚朱俊侯小飞黄建刚
Owner JIANGYIN ANCAN ELECTROCHEM EQUIP
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