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A preparation method and application of titanium grid-supported tin electrode based on high-pressure spraying method

A spraying method and titanium mesh technology, applied in the field of electrochemistry, can solve the problems of easily destroying electrode surface catalysts, poor electrode corrosion resistance, surface catalyst peeling, etc., and achieve the problem of inhibiting coating peeling, stable electrocatalytic activity, and increasing stability. sexual effect

Active Publication Date: 2021-07-13
CHONGQING IND POLYTECHNIC COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The catalyst on the surface of the electrode is easily damaged when the gas is precipitated from the titanium plate electrode, and the surface catalyst falls off, resulting in poor corrosion resistance of the electrode, decline in electrocatalytic performance, and low recycling rate.

Method used

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  • A preparation method and application of titanium grid-supported tin electrode based on high-pressure spraying method
  • A preparation method and application of titanium grid-supported tin electrode based on high-pressure spraying method
  • A preparation method and application of titanium grid-supported tin electrode based on high-pressure spraying method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1, a kind of preparation method of the titanium grid-supported tin electrode based on high-pressure spraying method, carries out according to the following steps:

[0036] S1: Put the titanium mesh substrate in 0.1-0.5mol / L sodium hydroxide solution and boil until slightly boiled to remove the oil stain on the surface of the titanium mesh substrate, and then place the oil-removed titanium mesh in a saturated oxalic acid solution for etching 2h until the surface forms pockmarks;

[0037] S2: Weigh SbCl 3 Place in a dry beaker, add an appropriate amount of concentrated hydrochloric acid to the beaker to SbCl 3 Just completely dissolved, continue to add diethanolamine and a certain amount of SnCl to the beaker 4 4H 2 O mixed, cooled and fully stirred until the solution became white and viscous, and stopped stirring, calculated by mass ratio, wherein SbCl 3 : concentrated hydrochloric acid: diethanolamine: SnCl 4 4H 2 O=6:20:320:600;

[0038] S3: Measure a...

Embodiment 2

[0043] Embodiment 2, a kind of preparation method of the titanium grid-supported tin electrode based on high-pressure spraying method, carry out according to the following steps:

[0044] S1: Put the titanium mesh substrate in 0.1-0.5mol / L sodium hydroxide solution and boil until slightly boiled to remove the oil stain on the surface of the titanium mesh substrate, and then place the oil-removed titanium mesh in a saturated hydrofluoric acid solution for engraving Etch for 2 hours until pitting is formed on the surface;

[0045] S2: weigh Sb separately 3 o 5 Place in a dry beaker, add an appropriate amount of concentrated sulfuric acid to the beaker to Sb 3 o 5 Just completely dissolved, continue to add triethanolamine and a certain amount of SnCl to the beaker 4 ·5H 2 O mixed, cooled and fully stirred until the solution became white and viscous, and stopped stirring, calculated by mass ratio, wherein Sb 3 o 5 :Concentrated sulfuric acid:Triethanolamine:SnCl 4 ·5H 2 O...

Embodiment 3

[0051] Embodiment 3, a kind of preparation method of the titanium grid-supported tin electrode based on high-pressure spraying method, carry out according to the following steps:

[0052] S1: Put the titanium mesh substrate in 0.1-0.5mol / L sodium hydroxide solution and boil until slightly boiled to remove the oil stain on the surface of the titanium mesh substrate, and then place the degreased titanium mesh in a saturated oxalic acid solution for 2 hours until the surface is pitted;

[0053] S2: weigh Sb separately 2 o 3 Place in a dry beaker, add an appropriate amount of concentrated nitric acid to the beaker to Sb 2 o 3 Just completely dissolved, continue to add ethylenediamine and a certain amount of SnCl to the beaker 2 2H 2 O mixed, cooled and fully stirred until the solution became white and viscous, and stopped stirring, calculated by mass ratio, wherein Sb 2 o 3 :Concentrated nitric acid:Diethylamine:SnCl 2 2H 2 O=6:22:270:550;

[0054] S3: Measure a certain ...

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Abstract

The invention discloses a preparation method and application of a titanium mesh-supported tin electrode based on a high-pressure spraying method. The surface of the titanium mesh is etched into a pitted surface, and the Sb x o y or Sb m Cl n , organic amine, Sn a Cl b ·zH 2 The white viscous mixture made by mixing O with silicate, hydroxide and deionized water is mixed according to the ratio of (1~5):(3~10), and then sprayed evenly on the treated titanium with a high-pressure spray gun. The surface of the mesh can be roasted on the titanium mesh. The method provided by the invention, because sodium silicate is used in the preparation process, suppresses the coating shedding problem caused by the excessive expansion of the organic amine during the heating process, and the specific surface area of ​​the electrode is large. The electrocatalytic activity is stable. When realizing the treatment of wastewater, the toxic organic substances can be broken through electrochemical catalysis and oxidation to break their chemical bonds, degraded into small molecular organic substances and non-toxic inorganic substances, and will not cause secondary pollution to the water body.

Description

technical field [0001] The invention relates to the technical field of electrochemistry, in particular to a preparation method and application of a titanium grid-supported tin electrode based on a high-pressure spraying method. Background technique [0002] Wastewater treatment in my country uses physical, chemical and biological methods to purify wastewater and reduce pollution, so as to achieve the purpose of recycling water resources. The physical method has the highest cost and is likely to cause secondary pollution; the biological method has the lowest cost but the conditions for cultivating bacteria are harsh, which limits its application in the treatment of strong acid-base and highly toxic wastewater. At present, most of the technologies for treating alkaline wastewater (such as CN 104944630 B, CN 101767858 A, etc.) degrade alkaline wastewater by adding chemical reagents and then using biological or physical methods, which easily causes secondary pollution of water b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/461C02F1/72C02F101/30C02F103/06
CPCC02F1/46109C02F1/4672C02F2001/46142C02F2101/30C02F2103/06
Inventor 吴明珠龙星昕张嘉侑刘润平陈燃付秋月杜军陶长元刘作华李应
Owner CHONGQING IND POLYTECHNIC COLLEGE
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