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Circular tubular titanium black membrane electrode with electrochemical oxidation activity and preparation method of circular tubular titanium black membrane electrode

A titanium dioxide, oxidation activity technology, applied in chemical instruments and methods, electrochemical water/sewage treatment, oxidized water/sewage treatment, etc. The effect of high chemical oxidation activity and improved treatment effect

Inactive Publication Date: 2016-07-20
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] Based on the problems existing in the above-mentioned prior art, the present invention provides a ring-shaped titanium dioxide membrane electrode with electrochemical oxidation activity and a preparation method thereof. Solved the problem of inefficient removal of organic matter due to mass transfer limitation in the electrochemical oxidation process

Method used

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  • Circular tubular titanium black membrane electrode with electrochemical oxidation activity and preparation method of circular tubular titanium black membrane electrode
  • Circular tubular titanium black membrane electrode with electrochemical oxidation activity and preparation method of circular tubular titanium black membrane electrode

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preparation example Construction

[0019] The embodiment of the present invention also provides a preparation method for preparing the ring-shaped titanium dioxide film electrode having electrochemical oxidation activity, which includes the following steps:

[0020] Titanium dioxide is obtained by reducing titanium dioxide with hydrogen in a high temperature environment (the obtained titanium dioxide is in powder form, and its properties are as follows: figure 2 shown), doping the prepared titanium dioxide with metal substances, adding a binder to prepare the slurry, putting the paste into a mold for extrusion molding, vacuum drying and high-temperature calcination to obtain a membrane electrode.

[0021] In the above preparation method, in the step of preparing titanium dioxide, the temperature of the high-temperature environment is 800-1200°C, and the hydrogen flow rate is 50-500mLmin -1 , The reduction time is 2~6h.

[0022] In the above preparation method, in the doping step of titanium oxide and metal el...

Embodiment 1

[0028] (1) Preparation of titanium dioxide powder: place the titanium dioxide powder in a tube furnace, -1 , under the condition of reduction temperature 1300℃, reduce for 6h. The phase characterization of the generated titanium dioxide powder was carried out, from figure 1 The XRD pattern of titanium dioxide powder shows that, except for a small amount of other miscellaneous peaks, the rest of the diffraction peaks correspond to Ti 4 o 7 characteristic peaks.

[0029] (2) Prepare pasty substance: 40mLNMP, titanium dioxide powder: ruthenium dioxide: iridium dioxide=100:0.5:0.5, titanium dioxide powder: PVDF=6:1 mass ratio;

[0030] (3) Compression forming: put the prepared pasty substance into a special steel mold for pre-compression, and the pressure is 60MPa.

[0031] (4) Vacuum drying: the pre-pressed prototype membrane electrode was dried in a vacuum drying oven for 6 hours at a drying temperature of 120°C.

[0032] (5) Repressing: After the membrane electrode is seal...

Embodiment 2

[0036] (1) Preparation of titanium dioxide powder: place titanium dioxide powder in a tube furnace, -1 , Reduction at 1000°C for 4h.

[0037](2) Prepare pasty substance: 40mLDMAC, titanium dioxide powder: ruthenium dioxide: iridium dioxide=300:0.5:0.5, titanium dioxide powder: PVDF=9:1 mass ratio;

[0038] (3) Compression molding: Put the prepared paste substance into a special steel mold for pre-compression, and the pressure is 90MPa.

[0039] (4) Vacuum drying: place the pre-pressed prototype membrane electrode in a vacuum drying oven to dry for 24 hours at a drying temperature of 90°C.

[0040] (5) Repressing: the ring-shaped titanium dioxide film electrode is sealed in a rubber bag and then repressed under a pressure of 400 MPa in a cold isostatic press to enhance the mechanical strength of the electrode.

[0041] (6) Vacuum drying: vacuum-dry the ring-shaped titanium dioxide film electrode again, the drying temperature is 100° C., and the drying time is 36 hours.

[00...

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Abstract

The invention discloses a circular tubular titanium black membrane electrode with electrochemical oxidation activity and a preparation method of the circular tubular titanium black membrane electrode. The circular tubular titanium black membrane electrode is of a circular tubular structure of which the wall thickness is 2-8 mm, the porosity is 50-85%, the specific surface area is 3-7 m<2> / g, the specific surface area with electric activity accounts for 2-8% of the total specific surface area of the electrode, the ratio of the internal specific surface area to the external electric activity specific surface area is 0.2-0.6, and the thickness of an electric activity layer is 100-700 [mu]m; the electrode comprises a main component of TinO(2n-1) and secondary components of doped metallic elements, wherein n is an integer which is greater than 3 and is less than 10; the mass ratio of TinO(2n-1) to the doped metallic elements is (100:1)-(500:1). The membrane electrode has the advantages of being high in porosity, large in electric activity specific surface area, high in electrochemical oxidation activity, stable in chemical property and the like, and can be prepared by using a simple and feasible process. The electrode material can be used as an anode, membrane separation and electrochemical oxidation process compounding are achieved, and the problem that the treatment efficiency is not high because of mass transfer restriction in electrochemical oxidation processes is solved.

Description

technical field [0001] The invention relates to a ring-shaped titanium dioxide film electrode with electrochemical oxidation activity and a preparation method thereof, belonging to the fields of water treatment technology and environmental functional materials. Background technique [0002] At present, the treatment of high-concentration, refractory, toxic and harmful wastewater has always been a worldwide problem. The current research status at home and abroad shows that currently, physicochemical + biochemical methods are mostly used to treat this type of wastewater. Although the treatment effect is obvious, the COD of the effluent is still not up to the standard, so it is necessary to carry out advanced treatment of the biochemical effluent. [0003] Advanced oxidation technology is an emerging technology that has attracted much attention, especially for the advanced treatment of refractory biodegradable organic wastewater. Advanced oxidation technologies include Fenton...

Claims

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Application Information

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IPC IPC(8): C02F1/46C02F1/72
CPCC02F1/46109C02F1/4672C02F2001/46133
Inventor 王建兵智丹段学娇赵欢李佳音何绪文张春晖
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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