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Electrode loading with composite oxide magnetic nanowire and carbon nanotube and its preparation and application

A composite oxide, magnetic nanotechnology, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of large electrode loss and high voltage of liquid phase discharge technology , to achieve the effect of improving full contact, easy control of preparation process conditions, and increasing discharge electric field strength

Inactive Publication Date: 2018-03-09
ZHEJIANG GONGSHANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In recent years, plasma catalytic technology has been considered as an advanced oxidation technology for efficiently degrading organic pollutants, but liquid phase discharge technology has problems such as high voltage and large electrode loss.

Method used

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  • Electrode loading with composite oxide magnetic nanowire and carbon nanotube and its preparation and application
  • Electrode loading with composite oxide magnetic nanowire and carbon nanotube and its preparation and application
  • Electrode loading with composite oxide magnetic nanowire and carbon nanotube and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] ZnCo 2 o 4 Preparation of nanowire / carbon nanotube electrodes

[0038] Mix 2.5g of cetyltrimethylammonium bromide (CTAB), 75mL of cyclohexane and 2.5mL of n-pentanol, and stir on a magnetic stirrer for 20 minutes to form. Add 3.75mL of 0.1M oxalic acid solution to the above solution system, and stir thoroughly for 30 minutes. Add 1.25ml of 0.05M Zn(NO 3 ) 2 solution and 0.1M Co(NO 3 ) 2 The mixed solution of the solution was stirred at room temperature for 24 hours, and the stirring was maintained throughout the operation. After the reaction, the obtained yellow microemulsion was centrifuged with alcohol to remove excess impurity ions, and the finally obtained sample was dried in air at 80° C. to obtain a pink powder. Separate the yellow powder in O 2 Heat treatment at 500°C for 3 hours to obtain the final product ZnCo 2 o 4 Nanowires.

[0039] Dissolve 0.01g of metal oxide, 0.4g of multi-walled carbon nanotubes and 4g of sodium dodecylbenzenesulfonate in 100...

Embodiment 2

[0041] CoFe 2 o 4 Preparation of nanowire / carbon nanotube electrodes

[0042] Mix 2.5g of cetyltrimethylammonium bromide (CTAB), 75mL of cyclohexane and 2.5mL of n-pentanol, and stir on a magnetic stirrer for 20 minutes to form. Add 3.75mL of 0.1M oxalic acid solution to the above solution system, and stir thoroughly for 30 minutes. Add 1.25ml of 0.05M Co(NO 3 ) 2 solution and 0.1M FeSO 4 solution and stirred at room temperature for 24 hours, maintaining stirring throughout the operation. After the reaction, the obtained yellow microemulsion was centrifuged with alcohol to remove excess impurity ions, and the finally obtained sample was dried in air at 80° C. to obtain a yellow powder. Separate the yellow powder in O 2 Heat treatment at 500°C for 3 hours to obtain the final product CoFe 2 o 4 Nanowires.

[0043] Dissolve 0.01g of metal oxide, 0.4g of multi-walled carbon nanotubes and 4g of sodium dodecylbenzenesulfonate in 100ml of ethylene glycol, and ultrasonicate ...

Embodiment 3

[0045] The gas-liquid interface micro-discharge experiment was carried out. Quartz glass is used as the high-voltage electrode to carry out dielectric barrier discharge, and the transition metal / cobalt composite oxide nanowire / carbon nanotube sponge electrode prepared in the embodiment (1) or (2) is used as the ground electrode, and the whole reactor is implemented Example (1) or (2) prepared electrodes. Use the compound electrode prepared by embodiment (1) or (2) to process 10mg / L phenol solution, wherein the size of the compound electrode is 6 * 7cm, add 100mL of configured phenol solution, set the distance 2mm between the electrode and the liquid surface, Close the reactor door. The reactor was turned on, and the reaction voltage was adjusted to 30V and the maximum reaction current at this voltage. The time of the phenol degradation process was set at 60 minutes, and a sample was collected every 5 minutes to 10 minutes. The sampling volume was about 1 mL. The content of p...

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Abstract

The invention discloses an electrode loading with a composite oxide magnetic nanowire and a carbon nanotube and its preparation and an application. The preparation includes steps of (1), mixing hexadecyl trimethyl ammonium bromide, hexamethylene and n-amyl alcohol evenly; then adding oxalic acid solution; after mixing evenly, adding mixed solution containing transition metal ion and cobalt ion; continuously stirring under the room temperature to obtain microemulsion; (2), centrifugally removing impurities and drying in the air to obtain powder; forging in the air to obtain the transition metal / cobalt composite oxide magnetic nanowire; (3), dissolving the transition metal / cobalt composite oxide magnetic nanowire and sodium dodecyl benzene sulfonate in ethylene glycol; after dispersing evenly, immersing a sponge or carbon felt electrode; taking out the sponge or carbon felt electrode and drying; immersing again; repeating the operation for many times to obtain the electrode. The actual application effect is stable and efficient, the electrode loaded with metal oxide / carbon nanotube can be prepared, and the plasma of organic pollutant can be degraded.

Description

technical field [0001] The invention belongs to the technical field of preparation of catalytic material nanowire electrodes and the application of environmental pollution purification, and in particular relates to a preparation method of metal oxide / carbon nanotube electrodes. Background technique [0002] In recent years, plasma catalytic technology has been considered as an advanced oxidation technology to efficiently degrade organic pollutants, but liquid phase discharge technology has problems such as high voltage and large electrode loss. In order to solve the shortcomings of large loss of electrode materials and high corona inception voltage, researchers use porous mesh glassy carbon electrodes or stainless steel metal meshes as electrodes to improve discharge channels, or distribute small holes on the surface of plate electrodes, which can be placed around the electrodes and the edges of the holes The region forms a discharge channel, and the discharge channel can be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/80B01J23/75C02F1/461C02F101/30C02F101/34
CPCC02F1/46109B01J23/75B01J23/80C02F2001/46142C02F2101/34C02F2101/30B01J35/33B01J35/23
Inventor 张轶聂菊桃陈梦娇朱家琛董炀王鹏凯丛燕青王齐
Owner ZHEJIANG GONGSHANG UNIVERSITY
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