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Electrode material with RuO2-IrO2 intermediate layer and for acidic wastewater treatment, and preparation method thereof

An acid wastewater, intermediate layer technology, applied in water/sewage treatment, water/sludge/sewage treatment, sterilization/microdynamic water/sewage treatment, etc., can solve the problem of low ammonia nitrogen degradation efficiency, poor stability, easy electrode Erosion and other problems occur, to achieve the effect of increasing active sites, improving corrosion resistance, and improving electrolytic oxidation efficiency

Active Publication Date: 2020-11-17
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] For Ti / RuO 2 The electrode is easily corroded under acidic conditions, has poor stability, low ammonia nitrogen degradation efficiency and other shortcomings. The invention provides a (Ti / RuO 2 -IrO 2 / PbO 2 ) / TiN composite electrode material and its preparation method

Method used

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  • Electrode material with RuO2-IrO2 intermediate layer and for acidic wastewater treatment, and preparation method thereof
  • Electrode material with RuO2-IrO2 intermediate layer and for acidic wastewater treatment, and preparation method thereof
  • Electrode material with RuO2-IrO2 intermediate layer and for acidic wastewater treatment, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A kind of (Ti / RuO 2 -IrO 2 / PbO 2 ) / TiN composite electrode material and preparation method, including the following processes:

[0049] 1) Ti mesh substrate pretreatment:

[0050] The titanium mesh was placed in an acetone solution for ultrasonic treatment for 20 minutes, dried and placed in a 10% oxalic acid solution, etched in a slightly boiling water bath for 3 hours, washed, and vacuum-dried to form a Ti substrate. The Ti substrate was sealed in ethanol solution for standby; it was activated in 10mol / L NaOH solution for 5min before use.

[0051] 2) Preparation of Ti / RuO by pyrolysis 2 -IrO 2 :

[0052] (a) Precursor sol preparation

[0053] RuCl 3 ·xH 2 O and H 2 IrCl 6H 2 O Weigh the sample according to the molar ratio of 1:0.5, and disperse it in isopropanol to form a mixed solution, then heat the mixed solution in a water bath at 80°C, and slowly add 0.1mol / L HCl solution dropwise, A homogeneous sol was formed after 2 h.

[0054] (b) After immersing...

Embodiment 2

[0064] A kind of (Ti / RuO 2 -IrO 2 / PbO 2 ) / TiN composite electrode material and preparation method thereof, comprising the following process steps:

[0065] 1) Ti mesh substrate pretreatment:

[0066] Put the titanium mesh in acetone solution for 20 minutes, blow it dry, put it in 10% oxalic acid solution, etch it in a slightly boiling water bath for 3 hours, wash it, dry it in vacuum, and seal it in ethanol solution for later use; before use, put it in 10mol / L Activation in NaOH solution for 5min.

[0067] 2) Preparation of Ti / RuO by pyrolysis 2 -IrO 2 :

[0068] (a) Precursor sol preparation

[0069] RuCl 3 ·xH 2 O and H 2 IrCl 6H 2 O Weigh the sample according to the molar ratio of 1:0.3, and disperse it in isopropanol to form a mixed solution, then heat the mixed solution in a water bath at 80°C, and slowly add 0.1mol / L HCl solution dropwise, A homogeneous sol was formed after 2 h.

[0070] (b) After immersing the Ti substrate in the above sol for 15s, dry it, s...

Embodiment 3

[0078] A kind of (Ti / RuO 2 -IrO 2 / PbO 2 ) / TiN composite electrode material and preparation method thereof, comprising the following process steps:

[0079] 1) Ti mesh substrate pretreatment:

[0080] Put the titanium mesh in acetone solution for 20 minutes, blow it dry, put it in 10% oxalic acid solution, etch it in a slightly boiling water bath for 3 hours, wash it, dry it in vacuum, and seal it in ethanol solution for later use; before use, put it in 10mol / L Activation in NaOH solution for 5min.

[0081] 2) Ti / RuO prepared by thermal cracking method 2 -IrO 2 :

[0082] (a) Precursor sol preparation

[0083] RuCl 3 ·xH 2 O and H 2 IrCl 6H 2 O Weigh the sample according to the molar ratio of 1:0.25, and disperse it in isopropanol to form a mixed solution, then heat the mixed solution in a water bath at 80°C, and slowly add 0.1mol / L HCl solution dropwise, A homogeneous sol was formed after 2 h.

[0084] (b) After immersing the Ti substrate in the above sol for 15s...

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Abstract

The invention relates to an electrode material with a RuO2IrO2 intermediate layer and for acid wastewater treatment, and a preparation method thereof. The preparation method comprises the following steps: carrying out matrix pretreatment on a Ti net to form a Ti substrate; preparing a RuO2-IrO2 intermediate layer by adopting a thermal cracking method; preparing a PbO2 outer layer by adopting an electrolysis method; and forming and preparing a TiN coating layer by adopting a CVD method so as to form a (Ti / RuO2-IrO2 / PbO2) / TiN composite electrode. IrO2 is doped into the middle layer, and ammonianitrogen removal efficiency is improved through the synergistic effect of IrO2 and RuO2; the reaction activity of the electrode is improved in virtue of the outer layer added with PbO2, and the degradation efficiency of ammonia nitrogen is improved; and a TiN material is introduced into the outer layer of the electrode to improve the corrosion resistance and wear resistance of the electrode and the stability of the electrode material. Meanwhile, according to the (Ti / RuO2IrO2 / PbO2) / TiN composite preparation method of the electrode, the stability and the use efficiency of the electrode are improved through a gradient and graded preparation method.

Description

technical field [0001] The present invention relates to the electrolytic cathode material in metallurgical mechanical pickling, acid regeneration process, more specifically, relates to a kind of (Ti / RuO 2 -IrO 2 / PbO 2 ) / TiN composite electrode material and preparation method. Background technique [0002] With the increasingly serious problem of water eutrophication and the gradual improvement of ammonia nitrogen discharge standards, the technology of advanced treatment of ammonia nitrogen wastewater has become a topic of widespread concern to scholars at home and abroad. Among them, the cold rolling units in the iron and steel industry are all involved in the pickling of strip steel. In order to realize the recycling of waste acid, acid regeneration units are designed and arranged. For hydrochloric acid regeneration units, most of them are equipped with a silicon removal process. When the silicon removal device is in operation, it will inevitably bring NH in the wastewa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/467C02F101/16
CPCC02F1/4672C02F2101/16
Inventor 高时庄侯红娟宋俊范洪健王晓武晟
Owner BAOSHAN IRON & STEEL CO LTD
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