Cerium oxide-doped modified lead dioxide porous electrode and preparation method thereof

A technology of lead dioxide and porous electrodes, which is applied in the fields of chemical instruments and methods, water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem that the electrodeposited layer is easy to fall off, and achieve enhanced electrocatalytic oxygen capacity, Improve the effect of degradation and improve the efficiency of electrolysis

Inactive Publication Date: 2015-10-28
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] One of the purposes of the present invention is to provide a method for preparing a modified lead dioxide porous electrode doped with cerium oxide in order to solve the above-mentioned electrodeposited layer that is easy to fall off, poor corrosion resistance, complicated process, and difficult to control. The method solves the problem that the electrodeposited layer is easy to fall off, and the obtained electrode has good corrosion resistance, and the process is simple and easy to control

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  • Cerium oxide-doped modified lead dioxide porous electrode and preparation method thereof
  • Cerium oxide-doped modified lead dioxide porous electrode and preparation method thereof
  • Cerium oxide-doped modified lead dioxide porous electrode and preparation method thereof

Examples

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Embodiment 1

[0041] A preparation method of a modified lead dioxide porous electrode doped with cerium oxide, specifically comprising the steps of:

[0042] (1), β-PbO 2 powder preparation

[0043] Dissolve 10g of lead acetate in 20ml of water, adjust the pH to 9.0-10.0 with NaOH, then add 80ml of NaClO and stir evenly, react at 90°C for 6h, filter the obtained reaction solution, and wash the obtained filter cake repeatedly with deionized water until The filter cake is washed clean, the effluent is neutral, and then the temperature is controlled at 60-90°C for drying to obtain β-PbO 2 powder;

[0044] The above-mentioned lead acetate, water and NaClO are calculated according to the ratio of lead acetate: water: NaClO is 1g: 2mL: 8mL;

[0045] Close and look at the D / MAX2200PC pad X to test the formula for the β-PbO obtained above 2 The powder is measured, and the obtained XRD pattern is as follows figure 1 As shown, the diffraction peaks of the control JCPDS Card correspond to the rut...

Embodiment 2

[0059] A preparation method of a modified lead dioxide porous electrode doped with cerium oxide, specifically comprising the steps of:

[0060] (1), β-PbO 2 powder preparation

[0061] Dissolve 10g of lead acetate in 20ml of water, adjust the pH to 9.0-10.0 with NaOH, then add 80ml of NaClO and stir evenly, react at 90°C for 6h, filter the obtained reaction solution, and wash the obtained filter cake repeatedly with deionized water until The filter cake is washed clean, the effluent is neutral, and then the temperature is controlled at 60-90°C for drying to obtain β-PbO 2 powder;

[0062] The above-mentioned lead acetate, water and NaClO are calculated according to the ratio of lead acetate: water: NaClO is 1g: 2mL: 8mL;

[0063] (2), the β-PbO of 5.6g step (1) gained 2 Mix the powder with 0.2g of cerium oxide powder and 0.2g of carbon powder to form a mixed powder, then add 2g of polytetrafluoroethylene emulsion with a concentration of 60% by mass and mix evenly, then con...

Embodiment 3

[0070] A preparation method of a modified lead dioxide porous electrode doped with cerium oxide, specifically comprising the steps of:

[0071] (1), β-PbO 2 powder preparation

[0072] Dissolve 10g of lead acetate in 20ml of water, adjust the pH to 9.0-10.0 with NaOH, then add 80ml of NaClO and stir evenly, react at 90°C for 6h, filter the obtained reaction solution, and wash the obtained filter cake repeatedly with deionized water until The filter cake is washed clean, the effluent is neutral, and then the temperature is controlled at 60-90°C for drying to obtain β-PbO 2 powder;

[0073] The above-mentioned lead acetate, water and NaClO are calculated according to the ratio of lead acetate: water: NaClO is 1g: 2mL: 8mL;

[0074] (2), the β-PbO of 5.2g step (1) gained 2 The powder is mixed evenly with the mixed powder composed of 0.4g cerium oxide powder and 0.4g carbon powder, and then 2g of polytetrafluoroethylene emulsion with a mass percentage concentration of 60% is a...

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Abstract

The invention discloses a cerium oxide-doped modified lead dioxide porous electrode and a preparation method thereof. The preparation method comprises the following steps: dissolving lead acetate in water, adjusting the pH value of the obtained solution to 9.0 to 10.0 by using NaOH, adding NaOH, carrying out uniform mixing under stirring, carrying out a reaction at 90 DEG C for 6 h, successively subjecting the obtained reaction solution to filtering and washing until eluant is neutral, and carrying out drying at a temperature controlled to be 60 to 90 DEG C so as to obtain beta-PbO2 powder; and uniformly mixing the obtained beta-PbO2 powder with mixed powder composed of cerium oxide powder and carbon powder, adding a teflon emulsion with mass percent concentration of 60%, carrying out uniform mixing under stirring, then carrying out drying at a temperature controlled to be 60 to 90 DEG C for 30 to 60 min, filling a circular-sheet-shaped or long-strip-shaped die with the dried mixture, controlling a pressure to be 20 MPa for 2 min and carrying out high-pressure sheet molding so as to obtain the cerium oxide-doped modified lead dioxide porous electrode with good conductivity and electro-catalytic properties. The cerium oxide-doped modified lead dioxide porous electrode is applied to treatment of dyeing waste water.

Description

technical field [0001] The invention relates to a modified lead dioxide porous electrode doped with cerium oxide and a preparation method thereof. Background technique [0002] The common preparation method of lead dioxide electrode in sewage treatment is mainly prepared by electrodeposition method. At present, the main base material used for plated lead dioxide electrodes is titanium, which has the advantages of good electrical conductivity, corrosion resistance and compatibility with PbO 2 Approximate coefficient of thermal expansion. In recent years, from the perspective of various factors affecting the preparation of this type of lead dioxide electrode, a lot of research has been done on this type of electrode, many improvements and perfections have been made, and it has developed into a new type of electrode represented by titanium-based lead dioxide electrode (DSA). lead dioxide electrodes. However, the process of preparing titanium-based lead dioxide electrode by t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461B01J23/14
Inventor 孙鹏哲陈东辉张问问邢俊涛朱琳琳
Owner SHANGHAI INST OF TECH
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