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Preparation method for titanium-based low-precious-metal-content oxide coating anode

A technology of oxide coating and precious metals, which is applied in the direction of electrodes, electrolytic processes, electrolytic components, etc., can solve the problems of poor stability and catalytic activity of anode materials, high production costs, etc., and achieve reduced production costs, stable performance, and current efficiency high effect

Inactive Publication Date: 2012-06-27
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing a titanium-based oxide coating anode with low precious metal content, so as to overcome the problems of poor stability and catalytic activity of the anode material in the background technology and high production cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] The sandblasted titanium plate was machined into a size of 10 mm × 10 mm × 1 mm with an effective area of ​​1.0 cm 2 The flake sample was washed with clean water and then ultrasonically cleaned in deionized water for 10 minutes, taken out, boiled with 37% concentrated hydrochloric acid, put the sample into it, boiled for 2 minutes, washed with clean water and then ultrasonically placed in deionized water Wash for 10 minutes, take it out, and let it dry for later use. Then tin tetrachloride (SnCl 4 ·5H 2 O), antimony trichloride (SbCl 3 ) were dissolved in isopropanol (C 3 h 7 OH), the prepared SnCl with a concentration of 0.5M 4 ·5H 2 O solution and SbCl 3 solution. Chloroiridic acid (H 2 IrCl 6 ·xH 2 O) and ruthenium trichloride (RuCl 3 ·xH 2 O) was dissolved in isopropanol and concentrated hydrochloric acid (HCl) at a volume ratio of 1:1 to obtain a concentration of 0.5M H 2 IrCl 6 ·xH 2 O solution and RuCl 3 ·xH 2 O solution. SnCl 4 ·5H 2 O, SbCl...

Embodiment 2

[0013] The sandblasted titanium plate was machined into a size of 20 mm × 20 mm × 1 mm and an effective area of ​​4.0 cm 2 The flake sample was washed with clean water and then ultrasonically cleaned in deionized water for 10 minutes, taken out, boiled with 37% concentrated hydrochloric acid, put the sample into it, boiled for 2 minutes, washed with clean water and then ultrasonically placed in deionized water Wash for 10 minutes, take it out, and let it dry for later use. Then tin tetrachloride (SnCl 4 ·5H 2 O), antimony trichloride (SbCl 3 ) were dissolved in isopropanol (C 3 h 7 OH), the prepared SnCl with a concentration of 0.5M 4 ·5H 2 O solution and SbCl 3 solution. Ruthenium trichloride (RuCl 3 ·xH 2 O) was dissolved in isopropanol and concentrated hydrochloric acid (HCl) at a volume ratio of 1:1 to make RuCl at a concentration of 0.5M 3 ·xH 2 O solution. SnCl 4 ·5H 2 O, SbCl 3 、RuCl 3 ·xH 2 O three solutions are mixed to form an anode coating solution...

Embodiment 3

[0015] The sandblasted titanium plate was machined into a size of 10 mm × 10 mm × 1 mm with an effective area of ​​1.0 cm 2 The flake sample was washed with clean water and then ultrasonically cleaned in deionized water for 10 minutes, taken out, boiled with 37% concentrated hydrochloric acid, put the sample into it, boiled for 2 minutes, washed with clean water and then ultrasonically placed in deionized water Wash for 10 minutes, take it out, and let it dry for later use. Then tin tetrachloride (SnCl 4 ·5H 2 O), antimony trichloride (SbCl 3 ) were dissolved in isopropanol (C 3 h 7 OH), the prepared SnCl with a concentration of 0.5M 4 ·5H 2 O solution and SbCl 3 solution. Chloroiridic acid (H 2 IrCl 6 ·xH 2 O) and ruthenium trichloride (RuCl 3 ·xH 2 O) was dissolved in isopropanol and concentrated hydrochloric acid (HCl) at a volume ratio of 1:1 to obtain a concentration of 0.5M H 2 IrCl 6 ·xH 2 O solution and RuCl 3 ·xH 2 O solution. SnCl 4 ·5H 2 O, SbCl...

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Abstract

The invention discloses a preparation method for a titanium-based low-precious-metal-content oxide coating anode. The preparation method comprises the following steps of: performing sand blasting and polishing treatment on a titanium substrate, removing oil stain, and putting into deionized water for performing ultrasonic cleaning; preparing chloro-iridic acid, ruthenium trichloride, trichloride antimony and tin tetrachloride into a masking liquid under the condition that the mole percent of chloro-iridic, ruthenium trichloride or a mixture of chloro-iridic and ruthenium trichloride is 2.5-30 percent, the mole percent of trichloride antimony is 10-15 percent and the mole percent of tin tetrachloride is 60-87.5 percent, coating onto the titanium substrate, drying at the temperature of 70-90 DEG C for 5 minutes, sintering at the temperature of 500-550 DEG C for 5 minutes, repeating the process till an oxide coating is up to 1.5-2.0 mg / cm<2>, and sintering at the temperature of 500-550 DEG C for one hour. The anode provided by the invention can be widely applied in the fields of seawater electrolysis chlorine preparation, electroflotation, electroosmosis, electrodeionization and the like. The anode has stable performance and high current efficiency, the precious metal molar ratio is lowered to 2.5-30 percent, and the cost can be lowered remarkably.

Description

technical field [0001] The invention relates to a preparation method of an anode, in particular to a titanium-based low-precious metal content oxidation method for chlorine and oxygen analysis in water and wastewater treatment such as electrolytic seawater chlorine production, electric floatation, electrodialysis, and electrodeionization. Preparation method of material coated anode. Background technique [0002] Chlorine is a common disinfectant widely used in water and wastewater treatment. Typically, chlorine is produced by electrolysis of a saturated sodium chloride solution. In recent years, more and more scholars have begun to pay attention to the direct electrolysis of seawater to produce chlorine and hypochlorite. Using seawater as the electrolyte does not require the consumption of additional chemical reagents, which can significantly save costs, which is of great significance in coastal areas where seawater resources are abundant. Since the chloride ion concentra...

Claims

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Application Information

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IPC IPC(8): C25B11/06C25B11/10
Inventor 陈雪明王斯文
Owner ZHEJIANG UNIV
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