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A method for preparing film by electrodepositing cobalt hydroxide nanosheets

A technology of cobalt hydroxide film and cobalt hydroxide, which is applied in the field of separation, can solve the problems of cumbersome preparation steps of two-dimensional materials, unstable product quality, high preparation cost, etc., and achieve shortened reaction time, improved production efficiency, and good versatility Effect

Active Publication Date: 2021-09-21
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, research on many two-dimensional materials has been hampered by cumbersome preparation steps, high preparation costs, and unstable product quality.

Method used

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  • A method for preparing film by electrodepositing cobalt hydroxide nanosheets
  • A method for preparing film by electrodepositing cobalt hydroxide nanosheets
  • A method for preparing film by electrodepositing cobalt hydroxide nanosheets

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Embodiment 1

[0034] In this embodiment, film formation is prepared by electrodepositing cobalt hydroxide nanosheets, which includes the following steps:

[0035] (1) Use deionized water to ultrasonically clean the ITO conductive glass for 5 minutes to remove the stains on the surface;

[0036] (2) Prepare the solution needed for electrodepositing cobalt hydroxide: weigh cobalt nitrate hexahydrate (Co(NO 3 ) 2 ·6H 2 O) Granules 2.9g, ammonium nitrate (NH 4 NO 3 ) particles 2g, dissolved in about 100mL deionized water, stirred at room temperature for 10 minutes to obtain a transparent and clear solution, transferred to a 500mL volumetric flask, and constant volume to obtain a mixed solution;

[0037] (3) Preparation of ultrasonic solution: Weigh 0.075g of polyvinylpyrrolidone (molecular weight 1300000, model K90, Shanghai Aladdin Biochemical Technology Co., Ltd.) powder and dissolve it in 500mL of deionized water, and stir at room temperature for 10 minutes to obtain a colorless, transpa...

Embodiment 2

[0049] In this embodiment, film formation is prepared by electrodepositing cobalt hydroxide nanosheets, which includes the following steps:

[0050] (1) Use deionized water to ultrasonically clean the ITO conductive glass for 5 minutes to remove the stains on the surface;

[0051] (2) Prepare the solution needed for electrodepositing cobalt hydroxide: weigh cobalt nitrate hexahydrate (Co(NO 3 ) 2 ·6H2 O) Granules 7.5g, ammonium nitrate (NH 4 NO 3 ) particles 5g, dissolved in about 100mL deionized water, stirred at room temperature for 10 minutes to obtain a transparent and clear solution, transferred to a 500mL volumetric flask, and constant volume to obtain a mixed solution;

[0052] (3) Preparation of ultrasonic solution: Weigh 0.1 g of polyvinylpyrrolidone powder and dissolve it in 500 mL of deionized water, stir at room temperature for 20 minutes to obtain a colorless, transparent and clear solution;

[0053] (4) Immerse the clean conductive glass obtained in step (1) ...

Embodiment 3

[0060] In this embodiment, film formation is prepared by electrodepositing cobalt hydroxide nanosheets, which includes the following steps:

[0061] (1) Use deionized water to ultrasonically clean the ITO conductive glass for 5 minutes to remove the stains on the surface;

[0062] (2) Prepare the solution needed for electrodepositing cobalt hydroxide: weigh cobalt nitrate hexahydrate (Co(NO 3 ) 2 ·6H 2 O) Granules 1.45g, ammonium nitrate (NH 4 NO 3 ) particles 1g, dissolved in about 100mL deionized water, stirred at room temperature for 10 minutes to obtain a transparent and clear solution, transferred to a 500mL volumetric flask, and constant volume to obtain a mixed solution;

[0063] (3) Preparation of ultrasonic solution: Weigh 0.075g of polyvinylpyrrolidone powder and dissolve it in 500mL of deionized water, stir at room temperature for 10 minutes to obtain a colorless, transparent and clear solution;

[0064] (4) Immerse the clean conductive glass obtained in step (...

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Abstract

The invention belongs to the technical field of separation membranes, and discloses a method for preparing membranes by electrodepositing cobalt hydroxide nanosheets. Method: 1) pretreat the conductive substrate; 2) deposit a cobalt hydroxide nanosheet array on the surface of the conductive substrate by electrodeposition; 3) place the conductive substrate with the cobalt hydroxide nanosheet array deposited on the surface in the solution , ultrasonic peeling, to obtain a nanosheet dispersion; the solution is an aqueous solution of polyvinylpyrrolidone; 4) centrifuging the dispersion, taking the supernatant, and stacking the nanosheets by vacuum filtration to form a film. The method of the invention is simple, the production efficiency is high, and the electrodeposited nano sheets are easy to peel off and disperse, and easy to form a film; the prepared film has better separation effect on dyes.

Description

technical field [0001] The invention belongs to the technical field of separation, and in particular relates to a method for preparing a film by electrodepositing cobalt hydroxide nanosheets. Background technique [0002] The chemical industry is a field that consumes a lot of energy, and the separation operation occupies a large proportion in each operation unit. It is extremely important to choose a separation method that is both convenient and low-cost. In the traditional separation methods such as rectification, absorption and chemical adsorption, there are problems such as huge energy consumption, complicated operation and high cost. For example, in the whole process of design, construction and use of chemical processes, separation equipment such as distillation towers and absorption towers are generally at the core. In addition to providing the energy source required for material flow, the control of material properties, flow and other parameters It becomes a key fact...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/02B01D67/00C25D9/04
Inventor 王海辉洪细鲁魏嫣莹周胜姚翔
Owner SOUTH CHINA UNIV OF TECH
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