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Three-dimensional ordered porous lead dioxide membrane electrode and preparation method thereof

A lead dioxide, three-dimensional ordered technology, applied in circuits, fuel cells, electrical components, etc., can solve the problems of low electrode electrocatalytic efficiency, high energy consumption, low energy consumption, etc., and achieve reduced energy consumption and high specific surface area. , the effect of large water flux

Inactive Publication Date: 2017-10-27
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the shortcomings of low electrode electrocatalysis efficiency and high energy consumption in the existing electrochemical oxidation technology, the present invention provides a new three-dimensional ordered porous PbO with high electrocatalysis efficiency, low energy consumption and synergistic effect of electrocatalysis and filtration. 2 membrane electrode

Method used

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  • Three-dimensional ordered porous lead dioxide membrane electrode and preparation method thereof
  • Three-dimensional ordered porous lead dioxide membrane electrode and preparation method thereof
  • Three-dimensional ordered porous lead dioxide membrane electrode and preparation method thereof

Examples

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Embodiment 1

[0028] Cut a porous titanium plate with a pore size of 5 μm into a size of Φ6.0 cm, and polish the titanium surface with sandpaper until it is smooth; ultrasonically clean the surface to remove oil; then heat to 80°C in a mixed solution of 18% hydrochloric acid and 20% oxalic acid for 20 minutes Remove the oxide layer; finally put it in deionized water for later use. The treated porous titanium substrate is dipped and brushed in a mixed solution of citric acid, ethylene glycol, tin tetrachloride pentahydrate and antimony trichloride, dried, and this step is repeated. The molar ratio of citric acid, ethylene glycol, tin tetrachloride pentahydrate and antimony trichloride is 120:25:7:1. A porous electrode with an interlayer of antimony-doped tin dioxide is obtained by roasting at 450°C, and the heating rate is 1°C / min, the roasting time is 1h. The porous electrode with antimony-doped tin dioxide interlayer is placed in 50ml polystyrene bead monodisperse liquid, and the diameter...

Embodiment 2

[0034] Cut a porous titanium plate with a pore size of 5 μm into a size of Φ6.0 cm, and polish the titanium surface with sandpaper until it is smooth; ultrasonically clean the surface to remove oil; then heat to 80°C in a mixed solution of 18% hydrochloric acid and 20% oxalic acid for 20 minutes Remove the oxide layer; finally put it in deionized water for later use. The treated porous titanium substrate is dipped and brushed in a mixed solution of citric acid, ethylene glycol, tin tetrachloride pentahydrate and antimony trichloride, dried, and this step is repeated. The molar ratio of citric acid, ethylene glycol, tin tetrachloride pentahydrate and antimony trichloride is 120:25:7:1. A porous electrode with an interlayer of antimony-doped tin dioxide is obtained by roasting at 450°C, and the heating rate is 1°C / min, the roasting time is 1h. Place the porous electrode with the interlayer of antimony-doped tin dioxide in 50ml polystyrene bead monodisperse liquid, the diameter ...

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Abstract

The invention discloses a method for preparing a three-dimensional ordered porous lead dioxide membrane electrode by a template electro-deposition method. The method comprises the steps of preparing an antimony-doped tin dioxide intermediate layer on a porous titanium matrix via a sol-gel method, assembling a polystyrene sphere mono-dispersion serving a template agent to the intermediate layer via natural settlement, then preparing a lead dioxide active layer in the gap of the template agent via an electro-deposition method, and finally dissolving the template agent to obtain the lead dioxide membrane electrode with a porous structure. The lead dioxide membrane electrode has three-dimensional ordered porous structure, large specific surface area, many electrochemical active sites and large filtration flux, overcomes the defects that the traditional lead dioxide electrode has a compact structure and cannot be applied to a filtering electrochemical system, and has great application value in the electrochemical catalysis field.

Description

technical field [0001] The invention belongs to the technical field of electrocatalytic electrode preparation, and in particular relates to a preparation method of a three-dimensional ordered porous lead dioxide film electrode and its application in the treatment of refractory organic matter. Background technique [0002] Due to its unique advantages such as high efficiency and environmental friendliness, electrochemical oxidation has attracted extensive attention in the field of refractory organic wastewater treatment. However, in the traditional electrochemical system, due to the limitation of mass transfer rate and space-time efficiency, there are defects such as low processing efficiency and high energy consumption, and these problems are difficult to solve in the traditional electrochemical system. In recent years, studies have found that filter reactors with three-dimensional porous membrane electrodes can significantly enhance mass transfer and facilitate electron tra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/1004H01M8/1016H01M8/1069
CPCH01M8/1004H01M8/1016H01M8/1069Y02E60/50
Inventor 王连军刘思琪崔韬周解臻韩卫清孙秀云李健生沈锦优
Owner NANJING UNIV OF SCI & TECH
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