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Single-layer MXene colloid as well as preparation method and application thereof

A colloidal, single-layer technology, applied in chemical instruments and methods, other chemical processes, nuclear engineering, etc., can solve problems that restrict MXene performance, reduce specific surface area utilization, limit applications, etc., achieve good selective adsorption performance and simple equipment , good stability

Active Publication Date: 2021-07-09
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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  • Single-layer MXene colloid as well as preparation method and application thereof
  • Single-layer MXene colloid as well as preparation method and application thereof
  • Single-layer MXene colloid as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

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

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

[0037]First, add 30 mL of HF solution with a mass concentration of 40% into a polytetrafluoroethylene bottle, then add 2.211 g of anhydrous LiCl into the HF solution, and stir to dissolve to obtain solution A;

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

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

Embodiment 2

[0061] A monolayer Ti 3 C 2 T X The preparation method of colloid is substantially the same as the method of embodiment 1, and its difference is,

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

[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, collect the lower precipitate after centrifugation and add 40 mL of deionized water.

Embodiment 3

[0066] A monolayer Ti 3 C 2 T X The preparation method of colloid is substantially the same as the method of embodiment 1, and its difference is,

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

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

[0069] In S9, collect the lower precipitate after centrifugation and add 60 mL of deionized water.

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Abstract

The invention provides a single-layer MXene colloid and a preparation method and application thereof, and the method comprises the following steps: S1, dissolving anhydrous LiCl in inorganic acid to obtain a solution A; s2, adding a precursor of MXene into the solution A, and carrying out a reaction at 50-60 DEG C; s3, adding the reaction solution in S2 into a hydrochloric acid solution for reaction, after the reaction is completed, taking lower-layer precipitate, repeatedly adding water and centrifuging the mixture until the pH value of upper-layer clear liquid is 5; s4, adding ethanol into the lower-layer precipitate obtained in S3, and carrying out ultrasonic treatment and separation, then collecting lower-layer precipitates, adding water, carrying out ultrasonic treatment and separation, and collecting the upper-layer liquid, so as to obtain single-layer MXene colloid. The single-layer MXene colloid is applied to selective adsorption of uranyl ions. The method is simple to operate, and the prepared single-layer MXene colloid is good in stability and has the performance of efficiently and selectively removing 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 its preparation method and application. Background technique [0002] MXene is a new type of two-dimensional structure material discovered by Gogotsi and Barsoum of Drexel University in the United States in 2011. Using the MAX phase material (a ternary layered ceramic) as a precursor, the chemical etching method is used to remove the weakly bonded atomic layer in the MAX phase, and the layered structure of MXene can be prepared. Since the advent of this new material, it has received extensive attention from scholars in the research fields of electrochemistry and functional nanomaterials. [0003] The general chemical formula of MXene can be M n+1 x n T z where 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 the surface...

Claims

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Application Information

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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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