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A ti/carbon aerogel/mno 2 Electrode and its preparation method and application

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 to prepare large-size anode plates, and the microporous structure of carbon aerogel is easy to collapse. , to achieve the effect of long service life, simple preparation process and stable performance

Active Publication Date: 2021-08-31
DONGGUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 airgel is easy to collapse.
Obviously, this method can only be used to prepare nanoparticles and cannot be directly used to prepare large-scale anode sheets

Method used

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  • A ti/carbon aerogel/mno <sub>2</sub> Electrode and its preparation method and application
  • A ti/carbon aerogel/mno <sub>2</sub> Electrode and its preparation method and application
  • A ti/carbon aerogel/mno <sub>2</sub> Electrode and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0040] (1) 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 was washed in 10% NaOH solution at 80 °C for 20 min to remove surface oil, and then Pickle in 5% oxalic acid solution at 88°C to remove the oxide film, and then ultrasonicate 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 min, and mix the solution evenly. NaMnO 4 The dosage is 6% of the total mass of the mixture, NaMnO 4 After complete dissolution, continue to stir for 20 min;

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

Embodiment 2

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

[0048] (1) A porous titanium substrate with a pore size of 15 μm, a porosity of 80%, a thickness of 5 mm, and a side length of 3 cm and 5 cm was washed in 10% NaOH solution at 80 °C for 20 min to remove surface oil, and then Pickle in 5% oxalic acid solution at 88°C to remove the oxide film, and then ultrasonicate with deionized water for 10 min;

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

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

Embodiment 3

[0055] A Ti / carbon aerogel / MnO 2 The preparation method of electrode, comprises 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 a side length of 3 cm and 5 cm was washed in 10% NaOH solution at 80 °C for 20 min to remove surface oil, Then pickled in 5% oxalic acid solution at 88°C to remove the oxide film, and then ultrasonicated with deionized water for 10 min;

[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 min, and mix the solution evenly. NaMnO 4 The dosage is 40% of the total mass of the mixture, NaMnO 4 After complete dissolution, continue to stir for 20 min;

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

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Abstract

The present invention relates to a kind of Ti / carbon aerogel / MnO 2 Electrode and its preparation method and application, the method is as follows: S1: pretreat the porous titanium substrate to remove surface oil and oxide film; S2: mix resorcinol, formaldehyde and water and stir evenly, then add NaMnO 4 , to be NaMnO 4 After dissolving, continue to stir to obtain a mixed solution; S3: Pour the mixed solution obtained from the porous titanium substrate treated in S1 and S2 into a mold to adjust the pH of the solution; S4: Put the mold described in S3 in a constant temperature water bath to stand still for Gelation, then aging in a constant temperature water bath, remove the mold to get Ti / phenolic resin / MnO 2 Wet gel; S5: Ti / phenolic resin / MnO obtained in S4 2 The wet gel is impregnated in an organic solvent with low surface tension, dried to obtain a dry airgel, and then the dry gel is carbonized in an inert atmosphere, and the Ti / carbon airgel / MnO 2 electrode. The preparation method provided by the invention is simple, the prepared electrode has a 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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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/04C02F1/461C02F1/72C02F101/34
CPCC02F1/46109C02F1/4672C02F2001/46133C02F2101/345
Inventor 张云飞梁飒牛军峰吕斯濠方占强徐剑晖
Owner DONGGUAN UNIV OF TECH
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