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Active material, adsorption electrode, capacitive deionization device, preparation method and application thereof

An active material, deionized water technology, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., can solve the problems of high cost, poor adsorption effect, non-renewable and other problems, achieve simple operation, better effect, general adaptable effect

Active Publication Date: 2022-02-25
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Claims
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Problems solved by technology

[0005] In order to overcome the disadvantages of non-renewable, high cost and poor adsorption effect in the existing materials for removing heavy metals, the present invention provides an active material, adsorption electrode, capacitive deionization device, preparation method and application

Method used

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  • Active material, adsorption electrode, capacitive deionization device, preparation method and application thereof
  • Active material, adsorption electrode, capacitive deionization device, preparation method and application thereof
  • Active material, adsorption electrode, capacitive deionization device, preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0040] A capacitive deionization adsorption electrode,

[0041] S1. Preparation of FMO: 5.2mmol of manganese acetate and 5.2mmol of ferric chloride were added to 50mL of deionized water as solution A, 15.67mmol of oxalic acid was dissolved in 50mL of deionized water as solution B, solution A and B were mixed and 27mL of 2M Sodium hydroxide, adjust the pH to about 9, then stand still for 2 hours, centrifuge, wash, dry, and grind to obtain FeMnO 3 precursor, and then calcined at 900 °C for 5 h to obtain FeMnO 3 powder;

[0042] S2. Preparation of FMO@PPy: Take 200mg of FMO and disperse it in 100mL of deionized water. 10mg of sodium dodecylsulfonate has been added to the water. After stirring for one hour, add 53ul of liquid pyrrole, then stir for 1h, and finally add 10ml of 0.1M ammonium peroxate (228mg), continue to stir at room temperature for 3h, and finally centrifuge and dry to obtain FMO@PPy;

[0043] S3. Preparation of capacitive deionization adsorption electrode: Take...

Embodiment 2

[0053] Referring to Example 1, the difference is that the mass of FMO is changed to 400mg during the preparation of FMO@PPy.

[0054] The FMO@PPy prepared in Example 2 was measured, and the results are shown in the attached Figure 6 , the package thickness of PPy is 80-150nm.

Embodiment 3

[0056] Referring to Example 1, the difference is that in the preparation of FMO@PPy, the mass of FMO during ultrasonic dispersion is changed to 100 mg.

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Abstract

The invention discloses an active material, an adsorption electrode, a capacitive deionization device and a preparation method and application thereof, the active material is polypyrrole-coated FeMnO3 as an electrode, pure FeMnO3 powder is prepared by adopting a chemical precipitation method and a calcination method, polypyrrole Ppy-coated FeMnO3 nanoparticles are prepared by adopting a chemical polymerization method, FeMnO3 and a conductive polymer are compounded in an in-situ polymerization mode, and the Ppy is coated outside the FeMnO3 nano-particles. The active material can be effectively applied to the field of removing heavy metal ions by electro-adsorption; the invention further discloses a capacitive heavy metal ion removal adsorption electrode, a capacitive deionization device and application thereof, the electrode serves as a negative electrode, the capacitive deionization device is applied to heavy metal removal, efficient electro-adsorption of different heavy metal ions is achieved, meanwhile, the electrode has stable circularity in heavy metal adsorption, and the problems of capacity limitation and difficult regeneration when the carbon material is used as an electrode are effectively solved.

Description

technical field [0001] The invention belongs to the technical field of capacitive deionization of heavy metal ions, and in particular relates to an active material for removing heavy metal ions, an adsorption electrode, a capacitive deionization device, a preparation method and an application. Background technique [0002] Since the 21st century, with the rapid development of economy and population, the demand for fresh water and clean drinking water has increased urgently for the sustainable development of human beings. Heavy metal pollution is a serious threat that adversely affects water and the natural environment. Heavy metal ions such as chromium (Cr), cobalt (Co), nickel (Cr), copper (Cu), lead (Pb) and cadmium (Cd) are highly toxic pollutants in wastewater, and enter organisms through the food chain leading to bioaccumulation , and is extremely difficult to degrade compared to organic pollutants. Even more unfortunately, exposure to even trace amounts of heavy meta...

Claims

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Application Information

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IPC IPC(8): C02F1/469C02F101/20
CPCC02F1/4691C02F2101/20
Inventor 周宏建徐应生张海民赵惠军
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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