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A kind of preparation method of hydrophobic natural fiber composite lead dioxide anode

A natural fiber and lead dioxide technology, applied in chemical instruments and methods, water/sewage treatment, water/sludge/sewage treatment, etc., can solve the lack of hydrophobic groups on the surface of the electrode, which does not conform to green chemistry, and the catalytic effect is general and other issues, to achieve the effect of long service life, efficiency improvement and energy consumption reduction

Active Publication Date: 2019-12-31
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] At present, the traditional titanium-based tin dioxide or lead dioxide electrode has fewer active sites on the coating surface, resulting in poor electrode stability and relatively general catalytic effect; at the same time, the lack of hydrophobic groups on the electrode surface makes a part of the electrode degrade during the degradation process. Electric energy is used for ionization of water instead of degradation of organic matter, increasing energy consumption, which does not conform to the concept of green chemistry

Method used

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  • A kind of preparation method of hydrophobic natural fiber composite lead dioxide anode
  • A kind of preparation method of hydrophobic natural fiber composite lead dioxide anode
  • A kind of preparation method of hydrophobic natural fiber composite lead dioxide anode

Examples

Experimental program
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Effect test

Embodiment 1

[0032] 1) Using a 3mm thick titanium sheet as the substrate, cut the titanium sheet into a size of 4cm×3cm with scissors; use 200-mesh coarse sandpaper and 40-mesh fine sandpaper to smooth the surface of the titanium sheet to remove the surface oxide layer and expose the metallic luster. Put the matrix in 10% sodium hydroxide solution and heat and boil for 10 minutes to remove surface oil; then place it in 10% oxalic acid and heat and boil for 1.5 hours to acid-etch the surface, rinse with deionized water and set aside ;

[0033] 2) Add 55% ethanol and 5% nitric acid to 40% tetrabutyl titanate by volume percentage, stir for 10 minutes until the solution is uniform, and obtain a light yellow precursor solution.

[0034] Immerse the clean and dry flaky titanium substrate into the light yellow precursor solution, ultrasonicate at 200W for 5 minutes, so that the surface of the titanium substrate is evenly covered with the impregnation solution, dry it at room temperature, put it i...

Embodiment 2

[0040] 1) Using a 3mm thick titanium sheet as the substrate, cut the titanium sheet into a size of 4cm×3cm with scissors; use 200-mesh coarse sandpaper and 40-mesh fine sandpaper to smooth the surface of the titanium sheet to remove the surface oxide layer and expose the metallic luster. Put the substrate into 10% by mass fraction of sodium hydroxide solution and heat and boil for 5 minutes to remove surface oil stains; then place it in 10% by mass fraction of oxalic acid and heat and boil for 1 hour to acid-etch the surface, rinse it with deionized water and set aside;

[0041] 2) Add 35% ethanol and 1% nitric acid to 64% tetrabutyl titanate by volume percentage, stir for 15 minutes until the solution is uniform, and obtain a light yellow precursor solution.

[0042] Immerse the clean and dry flaky titanium substrate into the light yellow precursor solution, ultrasonicate at 200W for 15 minutes, so that the surface of the titanium substrate is evenly covered with the impregnat...

Embodiment 3

[0047] 1) Using a 3mm thick titanium sheet as the substrate, cut the titanium sheet into a size of 4cm×3cm with scissors; use 200-mesh coarse sandpaper and 40-mesh fine sandpaper to smooth the surface of the titanium sheet to remove the surface oxide layer and expose the metallic luster. Put the substrate into 10% by mass fraction of sodium hydroxide solution and heat and boil for 7 minutes to remove surface oil stains; then place it in 10% by mass fraction of oxalic acid and heat and boil for 2 hours to acid-etch the surface, rinse it with deionized water and set aside;

[0048] 2) Add 46% ethanol and 4% nitric acid to 50% tetrabutyl titanate by volume percentage, stir for 20 minutes until the solution is uniform, and obtain a light yellow precursor solution.

[0049] Immerse the clean and dry flaky titanium substrate into the light yellow precursor solution, ultrasonicate at 200W for 10 minutes, so that the surface of the titanium substrate is evenly covered with the impregna...

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Abstract

The invention discloses a method for preparing a hydrophobic natural fiber composite lead dioxide anode. The method includes the steps that after a titanium substrate is subjected to ultrasonic treatment in a precursor solution containing tetrabutyl titanate, a titanium oxide layer can be formed on the surface of the titanium substrate through a thermal oxidation method, and then the electroreduction method is adopted for conducting reduction treatment on the titanium oxide layer covered on the surface of the titanium substrate at an indoor temperature so as to form a titanium hydride interlayer; and the titanium substrate subjected to electroreduction treatment is used as the anode, a copper sheet is used as the cathode, and accordingly a lead dioxide natural hair composite coating can beprepared on the surface of the titanium substrate with the electrodeposition method in electroplate liquid containing lead nitrate and natural hair at the temperature of 50-70 DEG C. The method is easy to operate, the experiment condition requirements are low, the technological process can be controlled easily, and the prepared composite anode is high in electrocatalytic activity and oxygen evolution potential, long in service life and suitable for being applied to industrialized wastewater degradation.

Description

technical field [0001] The invention belongs to the technical field of preparation of electrochemical catalytic electrodes, and in particular relates to a method for preparing a hydrophobic natural fiber composite lead dioxide anode. Background technique [0002] With the rapid development of the economy, more and more industrial wastewater is discharged, and its composition is more complex, most of which contain carcinogenic, teratogenic, and mutagenic highly toxic pollutants, which will be harmful to the natural environment and human life and health. cause a very serious hazard. Therefore, the treatment of industrial wastewater can not only alleviate the pressure of shortage of fresh water resources in China, but also avoid the harm of toxic industrial wastewater to the natural environment and human health. At present, electrocatalytic oxidation technology has become a research hotspot in wastewater treatment. The main disadvantage of electrochemical catalytic oxidation ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D15/00C25D9/06C25D5/38C02F1/461
CPCC02F1/46109C02F2001/46142C25D5/38C25D9/06C25D15/00
Inventor 邵丹张昕蕾谈国强王颖于婉茹
Owner SHAANXI UNIV OF SCI & TECH