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Preparation method of copper-doped coated electrode for treating printing and dyeing wastewater

A coating electrode, printing and dyeing wastewater technology, applied in textile industry wastewater treatment, sterilization/microdynamic water/sewage treatment, etc., can solve the problems of high cost of doping platinum elements, difficult control of electroplating conditions, complex coating composition and other problems , to achieve high electrocatalytic activity, facilitate large-scale industrial production, and simple electrode process

Inactive Publication Date: 2015-09-02
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The Chinese invention patent with application number 201110149758 discloses a titanium-based tin-antimony-platinum oxide electrode material and its preparation method. The composition is complex, and the cost of doping platinum is high

Method used

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  • Preparation method of copper-doped coated electrode for treating printing and dyeing wastewater
  • Preparation method of copper-doped coated electrode for treating printing and dyeing wastewater
  • Preparation method of copper-doped coated electrode for treating printing and dyeing wastewater

Examples

Experimental program
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Effect test

Embodiment 1

[0023] In this embodiment, a method for preparing a copper-doped coated electrode for treating printing and dyeing wastewater includes the following steps:

[0024] a. Titanium substrate pretreatment: use a pure titanium plate as the titanium substrate, polish the surface of the pure titanium plate with a polishing machine, immerse the pure titanium plate in a NaOH solution with a mass concentration of 10%, and heat it at 80°C for 2 hours to remove oil , and then immerse the pure titanium plate in oxalic acid with a mass concentration of 20%, treat it for 1~2h under the slightly boiling state of oxalic acid, and then rinse the pure titanium plate with deionized water for later use;

[0025] b. Preparation of intermediate layer coating liquid: 20gSnCl 4 ·5H 2 O, 1.3gSbCl 3 and 0.172gMnSO 4 Dissolve in isopropanol together, add HCl solution to adjust the pH value to 1, and ultrasonically oscillate for 1 hour at the same time to mix the solution evenly to obtain the intermedia...

Embodiment 2

[0036] This embodiment is basically the same as Embodiment 1, especially in that:

[0037] In this embodiment, a method for preparing a copper-doped coated electrode for treating printing and dyeing wastewater includes the following steps:

[0038] a. Titanium substrate pretreatment: this step is the same as in Example 1;

[0039] B. the preparation of middle layer coating liquid: this step is identical with embodiment one;

[0040] c. Brushing method is used to prepare the intermediate layer: this step is the same as that of Example 1;

[0041] d. Preparation of active layer coating solution: 20gSnCl 4 ·5H 2 O, 1.3gSbCl 3 and 0.138gCu(NO 3 ) 2 ·3H 2 Dissolve O in isopropanol together, add HCl solution to adjust the pH value to 1, and ultrasonically oscillate for 1 hour at the same time to mix the solution evenly to obtain the active layer coating solution. The mass percentage of Cu doping amount in this step is 1%;

[0042] e. Preparation of active layer by brushing m...

Embodiment 3

[0046] This embodiment is basically the same as the previous embodiment, and the special features are:

[0047] In this embodiment, a method for preparing a copper-doped coated electrode for treating printing and dyeing wastewater includes the following steps:

[0048] a. Titanium substrate pretreatment: this step is the same as in Example 1;

[0049] B. the preparation of middle layer coating liquid: this step is identical with embodiment one;

[0050] c. Brushing method is used to prepare the intermediate layer: this step is the same as that of Example 1;

[0051] d. Preparation of active layer coating solution: 20gSnCl 4 ·5H 2 O, 1.3gSbCl 3 and 0.414gCu(NO 3 ) 2 ·3H 2 Dissolve O in isopropanol together, add HCl solution to adjust the pH value to 1, and ultrasonically oscillate for 1 hour at the same time to mix the solution evenly to obtain the active layer coating solution. The doping amount of Cu in this step is 3% by mass;

[0052] e. Preparation of active layer ...

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Abstract

The invention discloses a preparation method of a copper-doped coated electrode for treating printing and dyeing wastewater, prepares a copper-doped titanium-base tin antimony oxide coated electrode, and belongs to the technical field of water treatment with electro-catalysis. The technology process of the preparation method comprises the following steps: preparing a tin antimony manganese interlayer coating solution; uniformly smearing the solution on a titanium plate with the surface of the titanium plate treated, carrying out air blast drying, and calcining the dried titanium plate at the temperature of 450-550 DEG C for 1-3 hours; uniformly smearing a copper-doped tin antimony active layer coating solution on the surface of the calcined titanium plate, carrying out air blast drying, calcining the dried titanium plate at the temperature of 450-550 DEG C for 1-3 hours; repeating the last step once. The preparation method is simple in technology and good in controllability; the active layer adopts common copper doping, so that the solvent toxicity and production cost are greatly reduced; the prepared electrode is relatively high in oxygen evolution potential and relatively large in capacitance, and can effectively and thoroughly treat printing and dyeing wastewater.

Description

technical field [0001] The invention relates to a method for preparing an electrochemical electrode, in particular to a method for preparing a special electrode for an electrocatalytic oxidation method, which is applied in the technical field of electrode material preparation. Background technique [0002] The printing and dyeing industry consumes a lot of water, and printing and dyeing wastewater contains a large amount of toxic and harmful pollutants. Although traditional biological treatment methods have been widely used in the removal of organic matter, in essence, biological treatment technology can only effectively remove biocompatible organic matter in wastewater, and is not suitable for non-biocompatible substances, but the equipment occupies a large area , long treatment time and high investment costs, the biological method can only be used as the pretreatment stage of wastewater treatment. Coagulation sedimentation method is also a main method of printing and dyei...

Claims

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Application Information

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IPC IPC(8): C02F1/467C02F103/30
Inventor 丁国际赵磊李珊胡梦楠焦正
Owner SHANGHAI UNIV
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