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Electrode active material capable of selectively adsorbing copper ions, electrode plate and application

A technology of electrode active materials and copper ions, which is applied in the field of water treatment, can solve problems such as complex operation, many side reactions, and high cost, and achieve good adsorption capacity, improved adsorption selectivity, and high selectivity.

Active Publication Date: 2020-12-11
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, there are disadvantages such as high cost, complicated operation, many side reactions, and large energy consumption.

Method used

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  • Electrode active material capable of selectively adsorbing copper ions, electrode plate and application
  • Electrode active material capable of selectively adsorbing copper ions, electrode plate and application
  • Electrode active material capable of selectively adsorbing copper ions, electrode plate and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] A nitrogen-sulfur-doped carbon-supported iron disulfide material, the preparation method of which comprises the following steps:

[0051] Dissolve 0.66 mol of ferric nitrate nonahydrate and 0.66 mol of diaminoterephthalic acid in 30 mL of dimethylformamide solution respectively, and then transfer them to a reaction kettle after ultrasonic treatment, and heat the reaction kettle to 130°C to keep After 24 hours, after natural cooling, centrifuge, wash with deionized water and dimethylformamide solution for several times, and then dry at 70°C to obtain reddish-brown MIL-88(Fe) powder;

[0052] The reddish-brown MIL-88 powder was heated to 600°C at a rate of 5°C / min, and calcined for 2 hours to obtain Fe@NC;

[0053] Fe@NC and sulfur powder were mixed, the mass ratio of Fe@NC and sulfur powder was 1:5, nitrogen gas was introduced, the temperature was raised to 500°C at a heating rate of 5°C / min, and the temperature was kept at a constant temperature for 2 hours. Finally, ni...

Embodiment 2

[0059] A nitrogen-sulfur-doped carbon-supported iron disulfide material, the preparation method of which comprises the following steps:

[0060] 10mmo1 of FeC1 3 ·6H 2 O and 10mmol of fumaric acid were mixed evenly, and reacted in an oil bath at 80°C for 12h, and the precipitate was centrifuged and washed with deionized water and ethanol until the washing liquid was transparent, and then dried at 70°C to obtain MIL-101 (Fe );

[0061] MIL-101 was heated to 600°C at a rate of 5°C / min, and calcined for 2 hours to obtain Fe@NC;

[0062] Fe@NC and sulfur powder were mixed, the mass ratio of Fe@NC and sulfur powder was 1:5, nitrogen gas was introduced, the temperature was raised to 500°C at a heating rate of 5°C / min, and the temperature was kept at a constant temperature for 2 hours. Finally, nitrogen-sulfur-doped carbon and The loaded iron disulfide constitutes the composite material FeS 2 @NSC.

[0063] The XRD patterns of MIL-88(Fe) obtained in Example 1 and MIL-101(Fe) obt...

Embodiment 3

[0065] Same as Example 1 except that the vulcanization temperature was 550°C.

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Abstract

The invention discloses an electrode active material capable of selectively adsorbing copper ions. The electrode active material is composed of nitrogen-sulfur doped carbon and iron disulfide loaded on the nitrogen-sulfur doped carbon. The invention further discloses an electrode plate, and an active material of the electrode plate is the electrode active material for selectively adsorbing the copper ions. The invention further discloses a capacitive deionization module which comprises the electrode plate. The invention also discloses an application of the capacitive deionization module. The nitrogen-sulfur-doped carbon-loaded iron disulfide FeS2-coating NSC material is obtained by calcining and vulcanizing an MOF material taking iron as a central atom, the doped carbon-loaded iron disulfide material has very good selective adsorbability to copper ions, and when the material is used as an electrode active material in a capacitive deionization module, the copper ion adsorption selectivity of the capacitive deionization module is improved, and the capacitive deionization module can be applied to removal of copper ions in drinking water or industrial wastewater.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to an electrode active material for selectively adsorbing copper ions, an electrode sheet and its application. Background technique [0002] Heavy metals refer to metals with a specific gravity greater than 5. There are about 45 types, including mercury, cadmium, copper, lead, etc. At present, due to the non-degradability and enrichment of heavy metals, it is recognized as one of the most serious pollutants to the environment. Most heavy metals will endanger the ecological environment and human health when they exist in excess in the environment. A large number of toxicological and epidemiological studies have confirmed that five of them, namely lead, chromium, cadmium, mercury, and arsenic, have the most obvious biological toxicity. In addition, although copper, manganese, zinc, nickel, etc. are essential trace elements for the human body, excessive intake will also cause ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/469B01J20/20B01J20/30C02F101/20
CPCC02F1/4691B01J20/0229B01J20/0285B01J20/20C02F2101/20
Inventor 周宏建高勇张云霞张海民汪国忠
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI