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A preparation of nano-co 3 o 4 Methods

A glow discharge and plasma technology, applied in the direction of nanotechnology, electrolytic components, electrolytic process, etc., can solve the problems of difficult control of microstructure, complicated preparation steps, high equipment requirements, etc., achieve fewer types, simple process, and less impurities in the product Effect

Active Publication Date: 2022-03-11
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation steps are complicated, the microstructure of the obtained product is difficult to control, and the equipment requirements are high, the raw materials are expensive, and secondary pollution is easy to occur

Method used

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  • A preparation of nano-co <sub>3</sub> o <sub>4</sub> Methods
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  • A preparation of nano-co <sub>3</sub> o <sub>4</sub> Methods

Examples

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Embodiment 1

[0039] The structure of the liquid cathode glow discharge plasma generating device of the present invention is as follows: figure 1 As shown, it includes: solution pool 3, peristaltic pump 4, buffer bottle 6, product pool 7, quartz capillary tube 8, graphite tube 12, liquid collector 9 and platinum needle electrode 14, solution pool 3 is used to add electrolyte, solution pool The first peristaltic pump rubber tube 2 is connected to the inlet end of the peristaltic pump 4, and the outlet end of the peristaltic pump 4 is connected to the 3-7mL buffer bottle 6 through the second peristaltic pump rubber tube 5. The buffer bottle 6 is used to reduce the pressure of the peristaltic pump 4. Pulsating, increasing discharge plasma stability. Buffer bottle 6 is connected with the lower end of quartz capillary 8, and quartz capillary 8 is vertically arranged, and after the upper end of quartz capillary 8 penetrates liquid collector 9 upwards along the bottom of liquid collector 9, then f...

Embodiment 2

[0041] Nano Co of the present invention 3 o 4 The preparation method of the method: add 500mL 0.05mol / L cobalt nitrate solution as the electrolyte into the solution pool 3 of the liquid cathode glow discharge plasma device, and provide electric energy with a high-voltage DC power supply, and the cobalt nitrate solution is driven by a peristaltic pump at a rate of 2.2mL / The flow rate of min flows through the buffer bottle, and finally overflows at the top of the capillary inserted into the graphite carbon rod. A voltage of 630V and a current of 53mA are applied between the positive and negative electrodes. After discharging for 3 hours, collect the product, ultrasonically disperse the brown-black turbid liquid for 10 minutes, centrifuge at 10,000 r / min, and wash with distilled water to remove Co in the solution. 2+ , vacuum-dried to constant weight at 45°C, and ground to obtain nano-Co with a sheet-like structure 3 o 4 .

Embodiment 3

[0043] Nano Co of the present invention 3 o 4 The preparation method: add 500mL 0.1mol / L cobalt nitrate solution as the electrolyte into the solution pool 3 of the liquid cathode glow discharge plasma device, provide electric energy with a high-voltage DC power supply, and the cobalt nitrate solution is driven by a peristaltic pump at a rate of 3mL / min The flow rate flows through the buffer bottle, and finally overflows at the top of the capillary inserted into the graphite carbon rod. A voltage of 640V and a current of 58mA are applied between the cathode and anode. After 2.5 h, collect the product, ultrasonically disperse the brown-black turbid liquid for 10 min, centrifuge at 10,000 r / min, and wash with distilled water to remove Co in the solution. 2+ , vacuum-dried to constant weight at 45°C, and ground to obtain nano-Co with a sheet-like structure 3 o 4 .

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Abstract

The invention discloses a method for preparing nano Co 3 o 4 method, will contain Co 2+ The solution is introduced into the liquid cathode glow discharge plasma generating device, and the high-voltage DC power supply is used to provide electric energy, and the platinum needle electrode sealed in the quartz tube is used as the anode, which contains Co 2+ Driven by the peristaltic pump, the solution flows through the buffer bottle, and finally overflows at the top of the capillary inserted into the graphite carbon rod, and the overflowing solution is used as the discharge cathode. When a voltage of 550-660V and a current of 45-90mA are applied between the cathode and anode, the liquid overflowing from the top of the capillary will generate a glow discharge plasma accompanied by brown-black turbid liquid. After continuous discharge for 2-4 hours, the product is collected and obtained in the form of flakes. Nanostructured Co 3 o 4 . The present invention utilizes liquid cathode glow discharge plasma to prepare Co 3 o 4 Nanoparticles have the advantages of simple process, mild conditions, controllable process, less impurities, high purity, good dispersibility, less types of chemical reagents used, low dosage, and no secondary pollution.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, in particular to a method for preparing nano Co 3 o 4 Methods. Background technique [0002] Transition metal oxide Co 3 o 4 It is an important functional material with a molecular weight of 240.79 and a density of 6.0-6.2g cm -3 , its powder is gray-black or black, with typical AB 2 o 4 type cubic spinel structure. At room temperature, Co 3 o 4 Insoluble in strong acids such as hydrochloric acid, nitric acid and aqua regia, but slowly soluble in hot sulfuric acid, quite stable in air environments below 800°C. In addition, Co 3 o 4 The theoretical specific capacitance is as high as 3560F·g -1 , the bandgap width is about 2.07eV. Due to its excellent physical and chemical properties, Co 3 o 4 Widely used in ceramics, magnetic materials, catalysts, gas sensors, solar cells and lithium-ion batteries and other fields. In these applications, Co 3 o 4 The microstructu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/01C25B1/50C01G51/04B82Y40/00
CPCC01G51/04B82Y40/00C01P2004/24
Inventor 陆泉芳罗荟俞洁冯菲菲李娟龙
Owner NORTHWEST NORMAL UNIVERSITY
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