Ti/carbon aerogel/MnO2 electrode and preparation method thereof, and applications

A carbon aerogel and electrode technology, which is applied in the field of Ti/carbon aerogel/MnO2 electrode and its preparation, can solve the problems that it cannot be directly used for the preparation of large-sized anode plates, and the microporous structure of carbon aerogel is easy to collapse. , to achieve the effect of long service life, simple preparation method and stable performance

Active Publication Date: 2018-11-20
DONGGUAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the above method, because the carbon airgel is prepared ex-situ and has no template support, the microporous structure of the prepared carbon airge

Method used

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  • Ti/carbon aerogel/MnO2 electrode and preparation method thereof, and applications
  • Ti/carbon aerogel/MnO2 electrode and preparation method thereof, and applications
  • Ti/carbon aerogel/MnO2 electrode and preparation method thereof, and applications

Examples

Experimental program
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Example Embodiment

[0038] Example 1

[0039] A Ti / carbon aerogel / MnO 2 The preparation method of the electrode includes the following steps:

[0040] (1) Put a porous titanium substrate with a pore size of 1 μm, a porosity of 60%, a thickness of 5 mm, and a side length of 3 cm and 5 cm in a 10% NaOH solution at 80°C for 20 min alkaline washing to remove oil stains on the surface. Pickled in a 5% oxalic acid solution at 88℃ to remove the oxide film, and then sonicated with deionized water for 10 min;

[0041] (2) Mix resorcinol, formaldehyde, and water at a molar ratio of 1:2:25, stir with a magnetic stirrer at a speed of 350 rpm / min for 15 minutes to mix the solution evenly, NaMnO 4 The dosage is 6% of the total mass of the mixed solution, NaMnO 4 After completely dissolved, continue to stir for 20 minutes;

[0042] (3) Pour the pretreated porous titanium substrate in step (1) and the mixed solution prepared in step (2) into an organic mold with a volume of 3cm×5cm×5 mm, and add 10% Na 2 CO 3 Aqueous so...

Example Embodiment

[0046] Example 2

[0047] A Ti / carbon aerogel / MnO 2 The preparation method of the electrode includes the following steps:

[0048] (1) Put a porous titanium substrate with a pore size of 15μm, a porosity of 80%, a thickness of 5 mm, and a side length of 3cm and 5cm in a 10% NaOH solution at 80°C for 20 min alkaline washing to remove oil stains on the surface. Pickled in a 5% oxalic acid solution at 88℃ to remove the oxide film, and then sonicated with deionized water for 10 min;

[0049] (2) Mix resorcinol, formaldehyde, and water at a molar ratio of 1.1:2.4:18, and stir with a magnetic stirrer at a speed of 350 rpm / min for 15 minutes to make the solution uniform. NaMnO 4 The dosage is 20% of the total mass of the mixed solution, NaMnO 4 After completely dissolved, continue to stir for 20 min;

[0050] (3) Pour the pretreated porous titanium substrate in step (1) and the mixed solution prepared in step (2) into an organic mold with a volume of 3cm×5cm×5 mm, and add 10% NaOH aqueous so...

Example Embodiment

[0054] Example 3

[0055] A Ti / carbon aerogel / MnO 2 The preparation method of the electrode includes the following steps:

[0056] (1) A porous titanium substrate with a pore size of 0.5 μm, a porosity of 40%, a thickness of 5 mm, and side lengths of 3 cm and 5 cm is placed in a 10% NaOH solution at 80°C for 20 min alkaline washing to remove oil stains on the surface. Then it is pickled in a 5% oxalic acid solution at 88°C to remove the oxide film, and then sonicated with deionized water for 10 minutes;

[0057] (2) Mix resorcinol, formaldehyde, and water at a molar ratio of 1:2.4:30, stir with a magnetic stirrer at a speed of 350 rpm / min for 15 minutes to mix the solution evenly, NaMnO 4 The dosage is 40% of the total mass of the mixed solution, NaMnO 4 After completely dissolved, continue to stir for 20 min;

[0058] (3) Pour the pretreated porous titanium substrate in step (1) and the mixed solution prepared in step (2) into an organic mold with a volume of 3cm×5cm×5 mm, and add 10...

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Abstract

The invention relates to a Ti/carbon aerogel/MnO2 electrode and a preparation method thereof, and applications. The preparation method includes the following steps: S1, performing pretreatment on a porous titanium substrate to remove surface oil stains and oxide films; S2, mixing resorcinol, formaldehyde and water, uniformly stirring the mixture, adding NaMnO4, and performing continuous stirring after the NaMnO4 is dissolved so that a mixed solution can be obtained; S3, pouring the porous titanium substrate treated by the S1 and the mixed solution obtained by the S2 into a mould, and adjustingthe pH of the solution; S4, placing the mould of the S3 into a thermostat water bath to stand for gelation, performing aging in the thermostat water bath, and obtaining a Ti/phenolic resin/MnO2 wet gel after the mould is removed; and S5, soaking the Ti/phenolic resin/MnO2 wet gel obtained by the S4 in an organic solvent with small surface tension, obtaining a dry aerogel after drying, placing thedry aerogel in an inert atmosphere to perform carbonization, and obtaining the Ti/carbon aerogel/MnO2 electrode by cooling. The preparation method is simple, and the prepared electrode has long service life and is environmentally friendly and pollution-free.

Description

technical field [0001] The invention relates to the technical field of electrocatalytic oxidation, in particular to a Ti / carbon aerogel / MnO 2 Electrode and its preparation method and application. Background technique [0002] Electrochemical oxidation has been widely used in the treatment of organic wastewater. It has the advantages of mild reaction conditions, good degradation effect, and convenient use. It has become one of the methods for efficiently treating refractory organics in the environmental field. [0003] The performance of the electrocatalytic anode is one of the key factors affecting the efficiency of electrooxidation. In recent years, researchers have used various anode materials, such as platinum electrodes, titanium-based oxide electrodes (Ti / Sn-SbO 2 、Ti / PbO 2 , Ti / MnO 2 ), rare earth doped oxide electrodes, carbon fiber electrodes, boron doped diamond electrodes (BDD), etc. Among them, Ti / MnO 2 It is one of the most promising electrodes for large-sca...

Claims

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Application Information

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IPC IPC(8): C02F1/461C02F1/72C02F101/34
CPCC02F1/46109C02F1/4672C02F2001/46133C02F2101/345
Inventor 张云飞梁飒牛军峰吕斯濠方占强徐剑辉
Owner DONGGUAN UNIV OF TECH
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