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Preparation method and application of nano-structural photocatalytic electrode

A nanostructure and photocatalytic technology, applied in chemical instruments and methods, electrodes, electrolysis processes, etc., can solve the problems of reduced electrode performance, small microscopic contact area, weak binding force, etc., to improve the enhanced oxidation life, increase Micro contact area, the effect of improving efficiency and longevity

Inactive Publication Date: 2019-03-08
JIANGYIN ANCAN ELECTROCHEM EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the Ru-Ti electrode coating used in the traditional chlor-alkali industry is prepared by butyl titanate, and its main disadvantages are: between the composite coating of the Ru-Ti coated electrode and the titanium substrate, and between the interior of the composite coating The binding force of the Ru-Ti coated electrode is not strong, there are many cracks on the surface of the coating, and the coating is easy to fall off, which results in a short life of the enhanced oxidation of the coating of the Ru-Ti coated electrode.
In addition, the specific surface area of ​​the coating of the traditional Ru-Ti coated electrode is small, so that the microscopic contact area between the electrolyte and the surface of the Ru-Ti coated electrode is small, which also reduces the performance of the electrode and reduces the need for sewage treatment. Effect

Method used

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  • Preparation method and application of nano-structural photocatalytic electrode
  • Preparation method and application of nano-structural photocatalytic electrode
  • Preparation method and application of nano-structural photocatalytic electrode

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Such as Figures 1 to 4 Shown is the embodiment of the photocatalytic electrode preparation method of a kind of nanostructure of the present invention, comprises the following steps:

[0032] (1) Electrode substrate pretreatment;

[0033] (2) Configure the metal salt solution: mix RuCl 3 with TiCl x Add solvent and mix well to get RuCl 3 with TiCl x the mixture;

[0034] (3) brushing: brushing the mixed solution onto the surface of the electrode base;

[0035] (4) Baking oxidation: the electrode substrate is brushed and then dried and oxidized to form a composite oxide coating of Ru and Ti on the surface of the electrode substrate, wherein the drying temperature is 400-600°C.

[0036] Preferably, the electrodes are pure Ti electrodes.

[0037] Among them, the TiCl x is titanium chloride, preferably TiCl 3 .

[0038] In the above-mentioned technical scheme, by adopting RuCl 3 with TiCl x The mixed solution of the electrode substrate is brushed, dried and oxid...

Embodiment 2

[0045] (1) adopt the preparation method of embodiment 1 to prepare electrode, wherein Ru=6g / m 2 , the mass ratio of Ru to Ti is 20:80. The prepared electrode was tested, and the chlorine evolution potential was measured to be 1.112V, and the enhanced life was 6000min.

[0046] (2) adopt the preparation method of embodiment 1 to prepare electrode, wherein Ru=15g / m 2, the mass ratio of Ru to Ti is 40:60. The prepared electrode was tested, and the chlorine evolution potential was measured to be 1.095V, and the enhanced life was 15000min.

[0047] (3) Traditionally use butyl titanate to prepare electrodes, where Ru=20g / m 2 , the mass ratio of Ru to Ti is 40:60. The prepared electrode was tested, and the chlorine evolution potential was measured to be 1.100V, and the enhanced life was less than or equal to 10000min.

[0048] The above test results show that under the condition of similar coating quality per square meter, the strengthening life of this embodiment is greatly imp...

Embodiment 3

[0050] Get sewage sample 1 and sewage sample 2, use the electrode that the preparation method of embodiment 1 makes, carry out electrolytic treatment to sewage sample 1 and sewage sample 2 respectively, carry out the test of sewage degradation effect after electrolytic treatment (chemical oxygen demand COD test ), and compared with the treatment effect of the traditional preparation electrode using butyl titanate, the results shown in the following table are obtained:

[0051]

[0052]

[0053] The above test results show that, compared with the electrode prepared by the traditional preparation method, the electrolytic treatment of the present invention has a greatly improved sewage degradation effect.

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Abstract

The invention relates to the technical field of coating electrodes, and discloses a preparation method and application of a nano-structural photocatalytic electrode. The preparation method of the nano-structural photocatalytic electrode comprises the following steps that (1) electrode matrix pretreatment is carried out; (2) a metal saline solution is configured, and specifically, RuCl<3> and TiCl<x> are added with a solvent and uniformly mixed to obtain mixed liquor of RuCl<3> and TiCl<x>; (3) brush coating is carried out, and specifically, the mixed liquor is applied to the surface of an electrode matrix in a brush coating mode; and (4) drying oxidation is carried out, specifically, drying oxidation is carried out on the electrode matrix after brush coating to form a composite oxidation layer of Ru and Ti of the surface of the electrode matrix, and the drying temperature is 400 DEG C-600 DEG C. According to the preparation method of the nano-structural photocatalytic electrode, the enhanced oxidation life of a Ru-Ti coating electrode is prolonged, the performance of the electrode is improved, and the effect of sewage treatment is good.

Description

technical field [0001] The invention relates to the technical field of coated electrodes, in particular to a preparation method and application of a nanostructured photocatalytic electrode. Background technique [0002] The electrolytic cell electrodes used in the traditional chlor-alkali industry often use Ti (titanium) electrodes. In order to improve its performance, the electrode surface is provided with a coating. A typical coated electrode is a composite coated electrode (Ru-Ti coated electrode) composed of a mixture of ruthenium oxide and titanium oxide on a titanium electrode substrate. [0003] However, the Ru-Ti electrode coating used in the traditional chlor-alkali industry is prepared by butyl titanate, and its main disadvantages are: between the composite coating of the Ru-Ti coated electrode and the titanium substrate, and between the interior of the composite coating The binding force of the Ru-Ti coated electrode is not strong, the cracks on the surface of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/06C25B11/10C02F1/461
CPCC02F1/46109C02F2001/46142C02F2305/10C25B1/55C25B11/051C25B11/057C25B11/093
Inventor 胡媛媛
Owner JIANGYIN ANCAN ELECTROCHEM EQUIP
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