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Preparation method and application of Fe-doped PTFE-PbO2/TiO2-NTs/Ti electrode

A ptfe-pbo2, electrode technology, applied in the direction of electrode, sterilization/microdynamic water/sewage treatment, electrolysis process, etc., can solve the problems that affect the continuous use of the electrode, the low bonding force of the Ti matrix, and the coating is easy to fall off, etc., to achieve catalytic Stable oxidation effect, reduced electrode cost, and extended service life

Inactive Publication Date: 2013-08-21
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the β-PbO2 electrode prepared by electrodeposition has good conductivity and corrosion resistance, but the Ti matrix and β-PbO 2 The binding force is small, the coating is easy to fall off as the degradation progresses, and the surface is cracked, which affects the continuous use of the electrode

Method used

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  • Preparation method and application of Fe-doped PTFE-PbO2/TiO2-NTs/Ti electrode
  • Preparation method and application of Fe-doped PTFE-PbO2/TiO2-NTs/Ti electrode
  • Preparation method and application of Fe-doped PTFE-PbO2/TiO2-NTs/Ti electrode

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Example 1 Preparation of Fe-doped PTFE-PbO 2 / TiO 2 -NTs / Ti electrodes:

[0036] Step 1. Cut the titanium plate into a suitable size, and polish the pre-cut titanium plate with 80-mesh, 240-mesh, and 600-mesh sandpaper until silver-white metallic luster appears and the surface of the titanium plate is smooth without scratches.

[0037]Step 2, ultrasonically clean the polished titanium plate in deionized water for 20 minutes, and in absolute ethanol and acetone for 10 minutes each, so as to remove aluminum and sand particles attached during polishing.

[0038] Step 3. Put the cleaned titanium plate in 40% NaOH aqueous solution by mass, heat it in a 95°C water bath to a constant temperature, soak it for 2 hours, take it out and rinse it with distilled water. This process mainly removes the grease on the titanium surface. Rinse the cleaned titanium plate and place it in an aqueous solution of 15% oxalic acid by mass, heat it to a constant temperature in a water bath at 8...

Embodiment 2

[0045] Same as Example 1, only change the current density to 10mA / cm 2 , The removal rate of p-nitrophenol in the treated wastewater was 89.5%.

Embodiment 3

[0047] Same as Example 1, only change the current density to 15mA / cm 2 , The removal rate of p-nitrophenol in the treated wastewater was 94.3%.

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Abstract

The invention discloses a preparation method and application of an Fe-doped PTFE-PbO2 / TiO2-NTs / Ti electrode. The preparation method comprises the following steps of: polishing and cleaning previously cut titanium plates, and placing the cleaned titanium plates respectively as an anode and a cathode into a solution for electrolysis; taking out an anode electrode after the electrolysis, washing to be clean by using water, drying, then placing into a muffle furnace, and baking to obtain a TiO2 nanotube; and electrodepositing in electrolyte by taking the TiO2 nanotube as the anode and graphite as the cathode to prepare the Fe-doped PTFE-PbO2 / TiO2-NTs / Ti electrode which takes Ti as a base plate. The Fe-doped PTFE-PbO2 / TiO2-NTs / Ti electrode prepared through the method disclosed by the invention has the advantages of higher treatment efficiency on industrial wastewater, stability in catalytic oxidation effect and longer electrode service life 8.1 times longer than that of common PbO2 / Ti, has higher oxygen evolution potential under a same condition and is difficult to generate oxygen evolution side reaction and more favorable to sufficiently carrying out electrocatalytic oxidation reaction.

Description

technical field [0001] The invention belongs to the field of wastewater electrocatalytic oxidation treatment, in particular to a Fe-doped PTFE-PbO 2 / TiO 2 - Preparation method and application of NTs / Ti electrode. Background technique [0002] Electrocatalytic oxidation technology is also an advanced oxidation technology. Under the action of electric current, strong oxidizing hydroxyl radicals (OH) are generated on the surface of the anode to oxidize refractory organic matter into CO 2 and H 2 O. This method has the advantages of strong oxidation ability, easy operation and easy control, and no secondary pollution. It has attracted more and more attention from various countries in the treatment of modern industrial wastewater, and is widely used in actual wastewater such as industrial wastewater, landscape wastewater, municipal sewage, coking wastewater, etc. deal with. [0003] Electrode materials in electrocatalytic oxidation play an important role in electrochemical...

Claims

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Application Information

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IPC IPC(8): C02F1/467C25B11/10C25B11/16
Inventor 孙亚兵荣少鹏赵泽华
Owner NANJING UNIV
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