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Carbon nanotube modified titanium based fluorine-containing lead dioxide electrode and preparation method thereof

A carbon nanotube and lead dioxide technology, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve the problems of insufficient current efficiency, poor stability, and easy peeling of the deposited layer, so as to improve the electric current. Catalytic activity, the effect of improving electrical conductivity

Inactive Publication Date: 2014-01-15
JILIN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor stability of the lead dioxide electrode during use, the deposited layer is easy to peel off, and the current efficiency is not high enough.

Method used

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  • Carbon nanotube modified titanium based fluorine-containing lead dioxide electrode and preparation method thereof
  • Carbon nanotube modified titanium based fluorine-containing lead dioxide electrode and preparation method thereof
  • Carbon nanotube modified titanium based fluorine-containing lead dioxide electrode and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] as attached figure 1 Shown: the structure of the titanium-based fluorine-containing lead dioxide electrode modified by carbon nanotubes of the present invention comprises:

[0035] Titanium plate substrate 1;

[0036] Tin antimony oxide bottom layer 2 thermally deposited on the titanium plate substrate;

[0037] Electrodeposition of α-PbO on Tin Antimony Oxide Underlayer 2 2 middle layer 3;

[0038] Electrodeposition on α-PbO under the action of surfactant 2 Carbon nanotube-modified fluorine-containing β-PbO on the intermediate layer 3 2 Surface active layer 4.

[0039] The preparation method is as follows: First, the titanium plate substrate (30 mm × 50 mm × 0.8 mm) was polished with 120-mesh coarse sandpaper, and then polished with 600-mesh and 1200-mesh fine sandpaper in turn until the titanium plate substrate showed a silvery-white metallic luster. Rinse; ultrasonically treat the polished titanium substrate in acetone for 10 minutes to remove oil stains; then ...

Embodiment 2

[0042] The preparation method of the electrode is the same as in Example 1.

[0043] The difference is that the fluorine-containing β-PbO modified by electrodeposited carbon nanotubes is used 2 The electroplating solution of the surface active layer is 100 milliliters mixed with 5 g / L carbon nanotubes, 0.1 g / L cetyltrimethylammonium bromide, 0.5 mol / L lead nitrate, 0.05 mol / L sodium fluoride and 1 The mixed solution of mol / liter nitric acid obtains the fluorine-containing lead dioxide electrode modified by carbon nanotubes prepared under the action of cetyltrimethylammonium bromide, as shown in Figure 4.

[0044] This electrode is used as the anode, the stainless steel plate of equal area is used as the cathode, and the distance between the poles is 1 cm. The concentration of p-chlorophenol in electrocatalytic oxidation water is 50 mg / L, and 0.05 mol / L of sodium sulfate is used as the supporting electrolyte. The volume of the solution is 200ml and the current density is 30mA / ...

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Abstract

The invention relates to a carbon nanotube modified titanium based fluorine-containing lead dioxide electrode and a preparation method thereof. The carbon nanotube modified titanium based fluorine-containing lead dioxide electrode is prepared by: taking a titanium plate as a substrate, polishing and etching the titanium plate substrate, performing thermal deposition of a tin antimony oxide base layer, then conducting electrodeposition of an alpha-PbO2 intermediate layer in an alkaline plating solution, and finally performing electrodeposition of a beta-PbO2 active layer in an acidic plating solution containing fluoride ions, a surfactant and a carbon nanotube. Compared with ordinary titanium based fluorine-containing lead dioxide electrodes, the carbon nanotube modified titanium based fluorine-containing lead dioxide electrode has high catalytic activity and long service life. The electrode can be used as an anode to treat organic wastewater, can achieve a good degradation effect, and can realize mineralization on poisonous and harmful organic matters that are difficult to degrade. Being easy and convenient to operate, the electrode provided by the invention is a potential electrode suitable for water treatment.

Description

technical field [0001] The invention relates to a titanium-based fluorine-containing lead dioxide electrode modified by carbon nanotubes and a preparation method thereof, which is used for electrocatalytic oxidation to remove organic pollutants in water, and belongs to the field of water treatment technology and electrochemistry. Background technique [0002] In recent years, the electrocatalytic oxidation method has become the preferred method of water treatment technology due to its incomparable advantages such as no or little consumption of chemical reagents, no secondary pollution, easy operation and control, and ability to mineralize refractory biodegradable organic matter. Research hotspots. However, there are still disadvantages such as low current efficiency of the electrode, short life of the electrode or high cost of the electrode. Therefore, how to prepare electrodes with high current efficiency, high stability and low price is an important issue in this field. ...

Claims

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Application Information

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IPC IPC(8): C02F1/461C02F101/30C02F101/36
Inventor 常立民段小月刘伟赵国升金鑫童
Owner JILIN NORMAL UNIV
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