Preparation method of MXene aerogel and application of MXene aerogel to adsorption of phosphorus and uranyl

An aerogel, mxene-ca-p technology

Active Publication Date: 2021-08-06
MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, as a non-renewable resource, phosphorus has limited reserves on the earth, and excessive phosphorus in water will form eutrophication, polluting water and organisms, so it is necessary to recycle and utilize phosphorus in water

Method used

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  • Preparation method of MXene aerogel and application of MXene aerogel to adsorption of phosphorus and uranyl
  • Preparation method of MXene aerogel and application of MXene aerogel to adsorption of phosphorus and uranyl
  • Preparation method of MXene aerogel and application of MXene aerogel to adsorption of phosphorus and uranyl

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Preparation of single-layer or few-layer D-MXene aerogels. Take 1 g of multilayer MXene powder, add it into 10 mL aqueous solution of 2 g of tetramethylammonium hydroxide pentahydrate, and stir magnetically at room temperature for 24 h for intercalation. The black mixed solution after intercalation was transferred to a dialysis bag, and the dialysis bag was immersed in an appropriate amount of deionized water for dialysis, and the deionized water was replaced regularly, and the dialysis was performed for 24 hours until the pH of the solution was neutral. The dialyzed mixed solution was centrifuged at 3500 rpm, and the suspension was collected to obtain a D-MXene suspension. The concentration of MXene in the suspension was adjusted to about 10 mg / mL by diluting with water or concentrating by rotary evaporation. The resulting MXene suspension was directly freeze-dried for 24 hours to obtain a single-layer or few-layer MXene aerogel, and its scanning electron microscope im...

Embodiment 2

[0032] a) Preparation of monolayer or few-layer D-MXene suspensions. Take 1 g of multilayer MXene powder, add it into 10 mL aqueous solution of 2 g of tetramethylammonium hydroxide pentahydrate, and stir magnetically at room temperature for 24 h for intercalation. The black mixed solution after intercalation was transferred to a dialysis bag, and the dialysis bag was immersed in an appropriate amount of deionized water for dialysis, and the deionized water was replaced regularly, and the dialysis was performed for 24 hours until the pH of the solution was neutral. The dialyzed mixed solution was centrifuged at 3500 rpm, and the suspension was collected to obtain a D-MXene suspension. The concentration of MXene in the suspension was adjusted to about 10 mg / mL by diluting with water or concentrating by rotary evaporation.

[0033] b) Preparation of MXene-Ca airgel. Take 5mL of the above D-MXene suspension (containing 50mg monolayer MXene), add (1.6mL, 1mol / L) calcium chloride a...

Embodiment 3

[0035]a) Preparation of monolayer or few-layer D-MXene suspensions. Take 1 g of multilayer MXene powder, add it into 10 mL aqueous solution of 2 g of tetramethylammonium hydroxide pentahydrate, and stir magnetically at room temperature for 24 h for intercalation. The black mixed solution after intercalation was transferred to a dialysis bag, and the dialysis bag was immersed in an appropriate amount of deionized water for dialysis, and the deionized water was replaced regularly, and the dialysis was performed for 24 hours until the pH of the solution was neutral. The dialyzed mixed solution was centrifuged at 3500 rpm, and the suspension was collected to obtain a D-MXene suspension. The concentration of MXene in the suspension was adjusted to about 10 mg / mL by diluting with water or concentrating by rotary evaporation.

[0036] b) Preparation of MXene-Ca gel. Take 5mL of the above D-MXene suspension (containing 50mg monolayer MXene), add (1.6mL, 1mol / L) calcium chloride aqueo...

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Abstract

The invention relates to a preparation method of an MXene aerogel composite nano material and application of the MXene aerogel composite nano material to adsorption of phosphorus and uranyl ions, and belongs to the technical field of nano adsorption materials, and the preparation method specifically comprises the following steps: 1) performing intercalation treatment on a multi-layer MXene (Ti3C2) material under the action of organic alkali to obtain a single-layer or few-layer D-MXene suspension; (2) adding Ca<2+> ions into the D-MXene aqueous solution to form stable MXene-Ca gel; and 3) immersing the MXene-Ca gel into a phosphate solution, taking out the gel after adsorption saturation, and drying the gel in a freeze dryer to obtain the MXene-Ca-P aerogel which can be used for efficiently adsorbing and removing uranyl ions. The preparation method is simple, the uranyl adsorption capacity is large, the irradiation resistance is good, phosphorus pollutants and uranyl in water can be continuously and efficiently removed, and the MXene aerogel has important application prospects.

Description

technical field [0001] The present invention relates to a kind of adsorption material, relate in particular to a kind of MXene (Ti 3 C 2 ) The preparation method of airgel and its adsorption application to phosphorus and uranyl belong to the technical field of nanometer adsorption materials. Background technique [0002] With the development of the nuclear industry, a large amount of radioactive pollutants are produced, and uranium-containing wastewater is a relatively common one. Because uranium is chemically and radioactively toxic, it poses a huge threat to human health and the environment, and it must be properly reprocessed. At present, the treatment methods of uranium-containing wastewater mainly include chemical precipitation, adsorption, ion exchange, biotechnology, membrane technology and so on. Among them, the adsorption method is a "green method" with the concept of saving energy and environmental protection. It is easy to operate, does not introduce secondary ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/02B01J20/28B01J20/30B01J20/32C02F1/28G21F9/12C02F101/10C02F101/00
CPCB01J20/0211B01J20/28047B01J20/3085B01J20/3071B01J20/3236C02F1/288G21F9/12C02F2101/105C02F2101/006
Inventor 黄德顺何泽祥岳国宗赵鹏翔杨丽军杨盼
Owner MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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