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Method for preparing electric catalytic carbon membrane through dynamic electrochemical deposition

An electrochemical and electrodeposition technology, applied in the field of membrane separation, can solve the problems of insufficient electrochemical degradation ability of carbon membranes, achieve the effects of low cost, enhanced processing capacity, and accelerated industrialization process

Active Publication Date: 2018-11-06
DALIAN MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a preparation method of an electrocatalytic carbon membrane with low cost, simple process and high pollutant degradation performance, so as to solve the problem of insufficient electrochemical degradation ability of the current carbon membrane in the process of wastewater treatment

Method used

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  • Method for preparing electric catalytic carbon membrane through dynamic electrochemical deposition
  • Method for preparing electric catalytic carbon membrane through dynamic electrochemical deposition
  • Method for preparing electric catalytic carbon membrane through dynamic electrochemical deposition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Soak a single-channel tubular carbon membrane (average pore size: 0.4 μm, porosity: 40%) in nitric acid aqueous solution (volume ratio of nitric acid to water: 1:2.5) for 2 hours, wash with dewatered water until neutral, and place at 60°C Dry in oven for 2h. Add zinc sulfate, citric acid and sodium hydroxide into water respectively to configure an electrodeposition solution, wherein the concentrations of zinc sulfate, citric acid and sodium hydroxide are respectively 1.0%, 0.5% and 1.0% (mass percentage). The carbon film is set as the anode, and the stainless steel sheet is set as the cathode, and immersed in the electrodeposition solution at the same time to form a two-electrode electrodeposition system. Place the tubular carbon membrane in the electrodeposition solution with the tubular central axis perpendicular to the ground, seal the bottom end of the tubular carbon membrane, connect the other end to the hose of the peristaltic pump, and use the negative pressure g...

Embodiment 2

[0039] Soak the seven-channel tubular carbon membrane (average pore size: 0.6 μm, porosity: 42%) in nitric acid aqueous solution (volume ratio of nitric acid to water: 1:2) for 1 hour, wash with dewatered water until neutral, and place at 80°C Dry in oven for 1h. Add tin tetrachloride, ammonium thiocyanate and potassium hydroxide to water respectively to configure an electrodeposition solution, wherein the concentrations of tin tetrachloride, ammonium thiocyanate and potassium hydroxide are 2.0%, 1.5%, and 4.0% respectively (mass percentage). The carbon film is set as the working electrode, the platinum sheet electrode is set as the counter electrode, and the calomel electrode is set as the reference electrode, and they are immersed in the electrodeposition solution at the same time to form a three-electrode electrodeposition system. Place in the electrodeposition liquid, seal the bottom end of the tubular carbon membrane, connect each channel to the hose of the peristaltic p...

Embodiment 3

[0044] Soak the non-hollow plate-shaped carbon membrane (average pore size: 0.8 μm, porosity: 41%) in nitric acid aqueous solution (the volume ratio of nitric acid to water is 1:4) for 3 hours, wash it with dewatered water until it is neutral, and place it at 50 ℃ oven dry for 2h. Add cobalt chloride, sulfosalicylic acid and sodium hydroxide into water respectively to configure an electrodeposition solution, wherein the concentrations of cobalt chloride, sulfosalicylic acid and sodium hydroxide are 3.0%, 1.5%, and 5.0% respectively (mass percentage). The carbon membrane is set as the anode, and the stainless steel mesh is set as the cathode, and is immersed in the electrodeposition solution at the same time to form a two-electrode electrodeposition system. The negative pressure generated by the peristaltic pump on one side of the carbon membrane makes the electrodeposition solution permeate from the other side of the carbon membrane. To the other side of the carbon film, dyna...

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Abstract

The invention relates to a method for preparing an electric catalytic carbon membrane through dynamic electrochemical deposition and belongs to the technical field of membrane separation. The method for preparing the electric catalytic carbon membrane through dynamic electrochemical deposition comprises the following steps: in an electrochemical deposition system, by taking a carbon membrane as anelectric deposition electrode and a corresponding metal salt solution of a metal oxide to be deposited as an electric deposition liquid, enabling the electric deposition liquid to penetrate through the carbon membrane in the electric deposition process, and depositing the metal oxide on the surface and in pores inside the carbon membrane. By adopting the dynamic electrochemical deposition technique, the catalyst can be deposited on the surface and in pores of the carbon membrane, the method is simple in preparation process and low in cost, and the utilization efficiency of the catalyst and the electrochemical properties of the carbon membrane are effectively improved. Due to preparation and development of the electric catalytic carbon membrane, the coupling advantage of membrane separation and electric catalysis can be sufficiently brought into play, the treatment capability of refractory wastewater can be improved, and the industrial progress of the technique can be accelerated.

Description

technical field [0001] The invention relates to a method for preparing an electrocatalytic carbon membrane by dynamic electrochemical deposition, and belongs to the technical field of membrane separation. Background technique [0002] Carbon membrane is a new type of porous inorganic membrane, which organically integrates the excellent structural characteristics of carbon materials and the advantages of membrane materials, and shows great application potential in the field of separation. Usually, the carbon film is prepared by high-temperature pyrolysis of carbon-containing precursor materials under inert gas or vacuum protection conditions. In recent years, our research group has developed the preparation process of tubular and flat carbon membrane products (Chinese patent ZL03134197.7; Chinese patent ZL03134196.9; Chinese patent ZL201110456881.4; Conductivity uses it as an electrode coupled with an electric field to improve its ability to treat wastewater (Chinese patent ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D67/00B01D69/02B01D69/04B01D69/06B01D71/02B01J23/06B01J23/14B01J23/34B01J23/50B01J23/72B01J23/745B01J23/75B01J23/755B01J35/06C02F1/461
CPCB01D67/0069B01D69/02B01D69/04B01D69/06B01D71/024C02F1/46109B01J23/06B01J23/14B01J23/34B01J23/50B01J23/72B01J23/745B01J23/75B01J23/755C02F2001/46161C02F2001/46133B01D2325/10B01J35/33B01J35/59
Inventor 宋成文王同华李琳李晨冯国卿潘宗林
Owner DALIAN MARITIME UNIVERSITY
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