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Preparation method of TinO2n-1 porous electrode and application thereof

A tino2n-1, porous electrode technology, applied in the field of electrochemistry, can solve the problems of low electrolysis efficiency of metal oxide electrodes, long cycle life of electrodes, high requirements for reaction temperature, etc., and achieves simple preparation method and strong electrochemical stability , The effect of simplifying the reaction process

Active Publication Date: 2019-09-10
NAVAL UNIV OF ENG PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the electrochemical oxidation wastewater treatment, it is very important to select a suitable anode material. Currently used electrochemical oxidation electrodes such as SnO 2 Electrode, PbO 2 Electrodes, etc., but because most of the doping elements are highly toxic, it is easy to cause secondary pollution to the environment. At the same time, the electrolysis efficiency of general metal oxide electrodes is low and the service life is short
[0003] Ti n o 2n-1 The electrode has excellent physical and chemical properties, high acid and alkali corrosion resistance, about 1500S / cm, which is much higher than that of carbon electrodes, and the cycle life of this electrode is longer, but most of the Ti n o 2n-1 The electrode technology requires high reaction temperature, and the preparation process is complicated. At the same time, the obtained Ti n o 2n-1 Middle Ti 4 o 7 Phase content is low, generally 35% to 55%

Method used

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  • Preparation method of TinO2n-1 porous electrode and application thereof
  • Preparation method of TinO2n-1 porous electrode and application thereof
  • Preparation method of TinO2n-1 porous electrode and application thereof

Examples

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Embodiment 1

[0031] A kind of Ti n o 2n-1 The preparation method of porous electrode, the method is:

[0032] S1, TiH with a mass ratio of 1:5 2 and TiO 2The raw material mixture of composition is put into the ball mill jar, adds the agate ball mixture that is that the big agate ball that is 1cm in diameter and the small agate ball that diameter is 0.5cm by the mass ratio of 2:1 is formed, then adds ethanol, in rotating speed is Ball milling under the condition of 240r / min for 24h to obtain a paste; the mass ratio of the agate ball mixture, raw material mixture and ethanol is 6:1:2;

[0033] S2. Treat the paste obtained in S1 at a temperature of 50°C for 24 hours, and then pass through a 100-mesh sieve to obtain a powder;

[0034] S3. Put the powder obtained in S2 into a tube furnace for sintering to obtain Ti n o 2n-1 powder; the sintering system is as follows: first use the high vacuum system to control the vacuum degree to 1×10 -3 hPa, then the temperature was raised from room te...

Embodiment 2

[0045] A kind of Ti n o 2n-1 The preparation method of porous electrode, the method is:

[0046] S1, TiH with a mass ratio of 1:5 2 and TiO 2 The raw material mixture of composition is put into the ball mill jar, adds the agate ball mixture that is that the big agate ball that is 1cm in diameter and the small agate ball that diameter is 0.5cm by the mass ratio of 2:1 is formed, then adds ethanol, in rotating speed is Ball milling under the condition of 240r / min for 24h to obtain a paste; the mass ratio of the agate ball mixture, raw material mixture and ethanol is 6:1:2.5;

[0047] S2. Treat the paste obtained in S1 at a temperature of 50°C for 24 hours, and then pass through a 100-mesh sieve to obtain a powder;

[0048] S3. Put the powder obtained in S2 into a tube furnace for sintering to obtain Ti n o 2n-1 powder; the sintering system is as follows: first use the high vacuum system to control the vacuum degree to 1×10 -3 hPa, then the temperature was raised from room...

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Abstract

The invention provides a preparation method of a TinO2n-1 porous electrode. The method comprises the following steps: mixing TiH2 and TiO2, carrying out ball milling, drying and screening, carrying out sintering, dropping polyvinyl alcohol so as to obtain a precursor mixture, adding the precursor mixture into foam nickel, carrying out pressurization so as to obtain a pressing blank, carrying out sintering, welding a lead on the surface of the foam nickel, sleeving the outer side of the lead by a polyvinyl alcohol tube, packaging a TinO2n-1 pre-finished product by using an epoxy resin, and after the epoxy resin is cured, carrying out flat polishing, so as to obtain the TinO2n-1 porous electrode. The invention further provides application, namely electrochemical degradation on organic matters in organic wastewater. By adopting the preparation method, TiH2 is adopted as a reducing agent of TiO2, TiH2 is capable of reducing temperatures required by reactions, Ti atoms and H atoms are decomposed by TiH2 to directly join in TiO2 reduction, and reaction processes can be simplified; and the TinO2n-1 pre-finished product is of a porous structure, is large in specific surface area, high in electrolysis rate and high in content of Ti4O7, and the TinO2n-1 porous electrode is high in oxygen evolution potential, good in electrochemical stability and high in organic matter removal rate in electrochemical degradation of organic matters in organic wastewater, can be repeatedly used, and is long in service life.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, in particular to a Ti n o 2n-1 Preparation method and application of porous electrode. Background technique [0002] Electrochemical oxidation treatment of organic wastewater has high efficiency and low energy consumption, and will not cause secondary pollution to the environment. It is a green water treatment technology with great development potential. In the electrochemical oxidation wastewater treatment, it is very important to select a suitable anode material. Currently used electrochemical oxidation electrodes such as SnO 2 Electrode, PbO 2 Electrodes, etc., but because most of the doping elements are highly toxic, it is easy to cause secondary pollution to the environment. At the same time, the electrolysis efficiency of general metal oxide electrodes is low and the service life is short. [0003] Ti n o 2n-1 The electrode has excellent physical and chemical properties, high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/467C02F101/34
CPCC02F1/4672C02F2101/345
Inventor 李国明迟钧瀚李萌逸孟令岽陈珊
Owner NAVAL UNIV OF ENG PLA
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