A kind of single-layer mxene colloid and its preparation method and application

A colloidal, single-layer technology, applied in chemical instruments and methods, other chemical processes, nuclear engineering, etc., can solve problems such as restricting the performance of MXene, reducing the utilization rate of specific surface area, and limiting applications, achieving good selective adsorption performance and simple equipment. , good stability

Active Publication Date: 2022-08-09
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, like other two-dimensional materials, the layered structure of MXene also brings a series of problems, such as the utilization rate of its specific surface area is greatly reduced due to layer stacking, and at the same time, due to problems such as stacking and agglomeration, MXene is greatly restricted. performance, which severely limits their application in many fields

Method used

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  • A kind of single-layer mxene colloid and its preparation method and application
  • A kind of single-layer mxene colloid and its preparation method and application
  • A kind of single-layer mxene colloid and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0035] A single layer of Ti 3 C 2 T X The preparation method of colloid comprises the following steps:

[0036] S1. Weigh Ti respectively 3 AlC 2 Powder 2.000g (200mesh), anhydrous LiCl 2.211g, HF solution with mass concentration of 40wt% 30mL;

[0037]First, 30 mL of HF solution with a mass concentration of 40% was added to the PTFE bottle, and then 2.211 g of anhydrous LiCl was added to the HF solution, and after stirring and dissolving, solution A was obtained;

[0038] S2, slowly add Ti to solution A 3 AlC 2 Powder, the feeding time is 1 min; after the feeding is completed, the reaction mixture is placed on a magnetic stirrer and stirred for 30 min, the stirred mixed solution is placed in an oven, and the oven temperature is set to 50-60 °C for 24-48 h;

[0039] S3. Take out the reacted mixed solution after cooling to room temperature in an oven, add 60 mL of HCl solution with a mass concentration of 18% to the plastic beaker, add the cooled mixed solution to the HC...

Embodiment 2

[0061] A single layer of Ti 3 C 2 T X The preparation method of colloid is basically the same as the method of Example 1, and the difference is that,

[0062] In S1, respectively weigh Ti 3 AlC 2 Powder 2.000g (200mesh), anhydrous LiCl 2.000g, 40mL of HF solution with a mass concentration of 40wt%;

[0063] In S7, add 60 mL of ethanol to the lower sediment of S6, and use a 750W ultrasonic machine to sonicate for 30 min in an ice bath;

[0064] In S9, the lower sediment after centrifugation was collected and 40 mL of deionized water was added.

Embodiment 3

[0066] A single layer of Ti 3 C 2 T X The preparation method of colloid is basically the same as the method of Example 1, and the difference is that,

[0067] In S1, respectively weigh Ti 3 AlC 2 2.000g of powder (200mesh), 4.000g of anhydrous LiCl, 40mL of HF solution with a mass concentration of 40wt%;

[0068] In S7, add 80 mL of ethanol to the lower sediment of S6, and use a 750W ultrasonic machine to sonicate for 90 min in an ice bath;

[0069] In S9, the lower sediment after centrifugation was collected and 60 mL of deionized water was added.

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Abstract

The invention provides a single-layer MXene colloid and a preparation method and application thereof. The method includes the following steps: S1, dissolving anhydrous LiCl in an inorganic acid to obtain a solution A; S2, adding a precursor of MXene to the solution A, And carry out the reaction at 50~60 ℃; S3, add the reaction solution of S2 into the hydrochloric acid solution and then react; after the reaction is completed, remove the lower layer sediment and repeat adding water and centrifugation, until the pH of the upper layer clear liquid is 5; S4, to S3 Ethanol is added to the lower layer of the precipitate, and ultrasonication and separation are performed; then the lower layer of sediment is collected, water is added, and then ultrasonication and separation are performed, and the upper layer liquid is collected to obtain a single-layer MXene colloid. The above monolayer MXene colloids were applied to selectively adsorb uranyl ions. The method is simple to operate, the prepared monolayer MXene colloid has good stability, and has the performance of efficient and selective removal of uranyl.

Description

technical field [0001] The invention relates to the technical field of MXene materials and uranyl wastewater treatment, in particular to a single-layer MXene colloid and a preparation method and application thereof. Background technique [0002] MXene is a new type of two-dimensional structural material discovered by Gogotsi and Barsoum of Drexel University in 2011. Using the MAX phase material (a ternary layered ceramic) as the precursor, chemical etching is used to remove the weakly bonded atomic layer in the MAX phase, and the layered MXene can be prepared. Since the advent of this new material, it has received extensive attention from scholars in the fields of electrochemistry and functional nanomaterials. [0003] The general chemical formula of MXene can be M n+1 X n T z Representation; M refers to transition metals, such as Ti, Zr, Hf, V, Nb, Ta, Cr, Sc, etc.; X refers to C or / and N; n is generally 1-3; T z Refers to surface groups such as O 2- , OH - , F - , ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/02B01J20/28B01J20/30G21F9/12G21F9/20
CPCB01J20/02B01J20/0211B01J20/28047G21F9/12G21F9/20Y02E60/13
Inventor 田强张建桥贺和颀晏敏皓孙佳一王雪莹
Owner SOUTHWEAT UNIV OF SCI & TECH
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