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Mxene material with organic chelating functional group grafted on surface and preparation method thereof

A technology of organic chelation and surface grafting, applied in the direction of separation methods, chemical instruments and methods, radioactive pollutants, etc., can solve the problems of limited adsorption capacity of materials, unfavorable large-scale application, non-renewable materials, etc., and achieve material form Good appearance structure, efficient governance, considerable effect

Inactive Publication Date: 2021-06-22
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the adsorption and treatment of heavy metals and radioactive ions, it is difficult to achieve efficient and thorough removal by pure Mxene alone, and the anchoring of these ions by pure Mxene is not stable
Although there are currently reports on the introduction of active hydroxyl groups on the surface of Mxene for the removal of lead ions, the adsorption capacity of this material is limited, and the material is not renewable and cannot be reused.
Also available on Ti 3 C 2 T x A report on loading nano-silver particles on Mexne for desalination, but silver is a noble metal with high cost, which is not conducive to large-scale application

Method used

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  • Mxene material with organic chelating functional group grafted on surface and preparation method thereof
  • Mxene material with organic chelating functional group grafted on surface and preparation method thereof
  • Mxene material with organic chelating functional group grafted on surface and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0033] Follow the steps below to prepare the Mxene material grafted with organic chelating functional groups

[0034] S1, 1g, 400 mesh Ti 3 C 2 The powder was dispersed in 200mL ethanol by ultrasonic and magnetic stirring to obtain suspension I (solid content: 5g / L), and then 200mg N-(trimethoxysilylpropyl)ethylenediaminetriacetic acid was added to 10mL ethanol to obtain solution II (2.47 wt%), mixed evenly for subsequent use;

[0035] S2. Add solution II to suspension I. The volume ratio of suspension I and solution II is 1:0.05. Ultrasonic and stir to mix evenly. Stir and react at 65°C for 12 hours, then centrifuge to separate the black solid, and use ethanol and water After cleaning, it was dried in an air blast oven at 80° C. for 12 hours to obtain the final product.

[0036] figure 1 It is the SEM picture of Mxene material, it can be seen that Mxene is in the shape of a louver stacked by two-dimensional nanosheets;

[0037] figure 2 It is the XRD pattern of the Mxe...

Embodiment 2

[0044] Prepare the Mxene material of grafted organic chelating functional group according to the following steps:

[0045] S1, 1g, 400 mesh Ti 3 C 2 The powder was dispersed in 200mL of ethanol by ultrasonic and magnetic stirring to obtain a suspension I (solid content: 5g / L), and then 300mg of N-(3-trimethoxysilylethyl)ethylenediamine was added to 10mL of ethanol to obtain a solution II ( 3.66wt%), mixed uniformly for subsequent use;

[0046] S2. Add solution II to suspension I, the volume ratio of suspension I and solution II is 1:0.05, sonicate and stir to mix evenly, stir and react at 65°C for 12h, then centrifuge to separate the black solid, and use ethanol and water After cleaning, it was dried in an air blast oven at 80° C. for 12 hours to obtain the final product.

[0047] The effective chelating functional group grafted on the surface of the Mxene material in this embodiment is an amino group, which can effectively chelate and remove heavy metal ions as a CDI elect...

Embodiment 3

[0050] Prepare the Mxene material of grafted organic chelating functional group according to the following steps:

[0051] S1, 1g, 800 mesh Ti 3 C 2 The powder was dispersed in 200mL of ethanol by ultrasonication and magnetic stirring to obtain a suspension I (solid content: 5g / L), and then 400mg of N-(3-trimethoxysilylpropyl)ethylenediamine was added to 10mL of ethanol to obtain a solution II ( 4.83wt%), mixed uniformly for subsequent use;

[0052] S2. Add solution II to suspension I. The volume ratio of suspension I and solution II is 1:0.05. Ultrasound and stir to mix evenly. Stir and react at 75°C for 10 hours, then centrifuge to separate the black solid, and use methanol and water After cleaning, it was dried in an air blast oven at 80° C. for 12 hours to obtain the final product.

[0053] The Mxene material of this example has excellent chelation removal efficiency for heavy metal ions, and the material can be regenerated. The adsorption experiment was carried out wit...

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Abstract

The invention belongs to the field of modification of Mxene materials, and discloses an Mxene material with an organic chelating functional group grafted on the surface, the Mxene material is combined with a grafting agent through a silicon-oxygen bond, and the grafting agent contains amino and / or carboxyl as the organic chelating functional group. The invention also discloses a preparation method of the Mxene material. The preparation method comprises the following steps: S1, dispersing Mxene powder in an organic solvent to obtain a suspension I, and adding the grafting agent into an organic solvent to obtain a solution II; and S2, adding the solution II into the suspension I, carrying out stirring reaction under an ultrasonic condition, then separating out a solid, and carrying out cleaning and drying to obtain a product. The preparation process is controllable and simple, operation is easy and convenient, the material is good in morphology and structure, the number of chelating functional groups grafted on the surface is considerable and uniform, and the material serving as a capacitive deionization electrode material is excellent in heavy metal ion and radioactive ion removal performance, so that efficient treatment of water is achieved, the material can be regenerated and recycled, and large-scale industrial production and application prospects are achieved.

Description

technical field [0001] The invention belongs to the field of modification of Mxene materials, in particular to a Mxene material with organic chelating functional groups grafted on the surface and a preparation method thereof. Background technique [0002] Since humans stepped into the industrial society and developed and applied nuclear energy, the pollution of heavy metals and radioactive ions has always been an environmental problem that seriously threatens human health and the ecological environment. How to efficiently control these industrial pollutions has always been the focus of research scholars. Although many traditional methods have been developed to control the pollution of heavy metals and radioactive ions, they all face some practical application problems, such as low efficiency, poor effect on low-concentration ions, secondary pollution caused by treated products, and high cost due to inability to regenerate etc. Therefore, it is particularly urgent to develo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/469C02F101/20
CPCC02F1/4691C02F2101/006C02F2101/20
Inventor 徐政和卢吉明大卫·哈伯特卢周广
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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