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Titanium-based nano-composite anode for zinc electrodeposition and processing technology of titanium-based nano-composite anode

A nano-composite and processing technology, applied in the field of electrodes, can solve the problems of weak bonding force of the active layer, increase the use range of zinc electrodeposited anodes, and the coating is easy to fall off, so as to achieve good oxygen evolution electrocatalytic activity and corrosion resistance. , Increase the chemical reaction active sites, the effect of flat and dense coating surface

Pending Publication Date: 2022-07-29
中宁县宁华再生资源循环利用科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, zinc electrowinning also has many disadvantages: the binding force between the active layers is not strong, and the coating is easy to fall off during the acid corrosion process. In order to enhance the service life of the zinc electrowinning anode, the electrode has good electrocatalytic activity and oxygen evolution activity. Excellent conductivity, solve the above problems at the same time, increase the use range of zinc electrowinning anodes, and make them meet various industrial production conditions. The invention discloses a titanium-based nanocomposite anode for zinc electrowinning and its processing technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Step 1: Take the titanium plate, grind it flat, put the treated titanium plate into sodium hydroxide solution, react at 70°C for 35 minutes, and rinse with deionized water; take 5ml of nitric acid, 20ml of hydrogen fluoride, and 25ml of deionized water and mix them evenly , put it into the titanium plate, react for 2.5min, remove the oxide film, rinse with deionized water; put it into 3ml oxalic acid solution for acid etching for 2.5h, wash it, put it into deionized water, and obtain the titanium plate after acid etching.

[0032] Step 2: Take 5.0g of multi-walled carbon nanotubes, heat and reflux in 16ml of HCl for 7 hours, cool to 26°C, repeatedly wash with deionized water, filter with suction, dry, take 15ml of sulfuric acid and 5ml of nitric acid and mix them evenly, add multi-walled carbon nanotubes , heated to reflux for 35 min, washed with deionized water, suction filtered to pH 7, sonicated for 35 min, suction filtered, dried at 51°C, and ground to obtain modifie...

Embodiment 2

[0043] Step 1: Take the titanium plate, grind it flat, put the treated titanium plate into sodium hydroxide solution, react at 65°C for 30 minutes, rinse with deionized water; take 5ml of nitric acid, 20ml of hydrogen fluoride, and 25ml of deionized water and mix them evenly , put into the titanium plate, react for 2min, remove the oxide film, rinse with deionized water; put it into 3ml oxalic acid solution for acid etching for 2h, clean it, put it into deionized water, and obtain the titanium plate after acid etching.

[0044] Step 2: Heat 5.0g of multi-walled carbon nanotubes in 16ml of HCl for 6 hours, cool to 24°C, repeatedly wash with deionized water, filter with suction, dry, take 15ml of sulfuric acid and 5ml of nitric acid and mix them evenly, add multi-walled carbon nanotubes , heated to reflux for 30 min, washed with deionized water, suction filtered to pH 7, sonicated for 30 min, suction filtered, dried at 48°C, and ground to obtain modified multi-walled carbon nanot...

Embodiment 3

[0055] Step 1: Take the titanium plate, grind it flat, put the treated titanium plate into sodium hydroxide solution, react at 75°C for 40min, and rinse with deionized water; take 5ml of nitric acid, 20ml of hydrogen fluoride, and 25ml of deionized water and mix them evenly , put into titanium plate, react for 3min, remove oxide film, rinse with deionized water; put into 3ml oxalic acid solution for acid etching for 3h, wash, put into deionized water to obtain titanium plate after acid etching.

[0056] Step 2: Heat 5.0g of multi-walled carbon nanotubes in 16ml of HCl for 8 hours, cool to 28°C, repeatedly wash with deionized water, filter with suction, dry, take 15ml of sulfuric acid and 5ml of nitric acid and mix them evenly, add multi-walled carbon nanotubes , heated to reflux for 40 min, washed with deionized water, suction filtered to pH 7, sonicated for 40 min, suction filtered, dried at 54°C, and ground to obtain modified multi-walled carbon nanotube powder.

[0057] Ste...

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Abstract

The invention discloses a titanium-based nano composite anode for zinc electrodeposition and a processing technology of the titanium-based nano composite anode. The bonding force between layers of the alpha-PbO2-layer titanium-based electrode is improved by coating a titanium plate with the naphthol-modified multi-walled carbon nanotubes, the number of active points on the surface of an electrode material is increased by adding nano zirconium dioxide into a plating solution, and meanwhile, the electrode is more uniform and smoother by adding graphene and potassium ferricyanide into the beta-PbO2-layer titanium-based electrode, so that the electrochemical performance of the electrode is improved, and the electrochemical performance of the electrode is improved. Cracks are obviously reduced, crystal grains are complete, invasion of acid to a titanium matrix is slowed down during zinc electrodeposition, the service life of a motor is prolonged, and the current efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of electrodes, in particular to a titanium-based nanocomposite anode for zinc electrowinning and a processing technology thereof. Background technique [0002] Titanium alloy has excellent properties such as high strength, high humidity resistance, light weight and good corrosion resistance. At the same time, iron is easy to be machined, cheap and relatively stable in electrochemistry. Titanium-based anodes are the main anodes used in zinc electrowinning. The use of anode materials directly affects the energy consumption of zinc electrowinning, the yield and quality of cathode zinc. Compared with lead and lead-containing gold, titanium-based anodes have the advantages of good mechanical strength, stable shape and size, and not easy to bend and deform. [0003] However, zinc electrodeposition also has many shortcomings: the bonding force between the active layers is not strong, and the coating is easy to fal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D5/38C25D5/48C25D21/12
CPCC25D5/38C25D5/48C25D21/12Y02P10/20
Inventor 冯飞张强冯铸赵程李怀让
Owner 中宁县宁华再生资源循环利用科技有限公司
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