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MXene two-dimensional material and Cu/MXene catalyst, and preparation methods and applications thereof

A technology of two-dimensional materials and catalysts, applied in the direction of physical/chemical process catalysts, catalysts, catalyst carriers, etc., can solve the problems of complex post-processing methods, achieve good catalytic activity, avoid waste of resources, and simple process

Active Publication Date: 2020-02-28
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation of traditional supported two-dimensional material catalysts often requires surfactants and reducing agents, and the post-treatment method is complicated, requiring a large number of means to remove the surface groups brought during the loading process.

Method used

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  • MXene two-dimensional material and Cu/MXene catalyst, and preparation methods and applications thereof
  • MXene two-dimensional material and Cu/MXene catalyst, and preparation methods and applications thereof
  • MXene two-dimensional material and Cu/MXene catalyst, and preparation methods and applications thereof

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preparation example Construction

[0033] A kind of preparation method of MXene two-dimensional material provided by one aspect of the embodiment of the present invention, it comprises:

[0034] The uniform mixed reaction system comprising lithium fluoride, acid and Mxene precursor is reacted at 20-60°C for 5-72h,

[0035] The obtained reaction product is mixed with water, and the obtained mixture is shaken for 10 to 1200 minutes, preferably 30 to 60 minutes, and then ultrasonically treated for 10 to 300 minutes to obtain the MXene two-dimensional material.

[0036] In some embodiments, the mass ratio of lithium fluoride to acid is 1:6˜1:40.

[0037] In some embodiments, the mass ratio of the Mxene precursor to lithium fluoride is 1:0.6˜1:2.4.

[0038] Further, the power of the ultrasonic treatment is 80W-360W.

[0039] Further, the Mxene precursor includes Ti 3 AlC 2 、Ti 2 AlC, V 2 AlC, Mo 2 AlC, Nb 2 Any one or a combination of two or more of AlC, etc., but not limited thereto.

[0040] Further, the ...

Embodiment 1

[0080] A kind of highly dispersed Cu / Ti involved in this embodiment 3 C 2 T x The preparation method of catalyst material comprises the steps:

[0081] Step 1: Ti in a PTFE lined with a stir bar 3 C 2 T x Synthesis of two-dimensional carrier: Mix HCl and 3.6g lithium fluoride evenly in a water bath at 37°C, and stir for 0-30min. A certain quality of Ti 3 AlC 2Slowly added to it (Ti 3 AlC 2 : the mass ratio of lithium fluoride is 1:0.6, the mass ratio of lithium fluoride to acid is 1:6, the concentration of hydrochloric acid is not fixed, and other acids or mixed acids can also be used instead of hydrochloric acid), stirred for 5h, and made to fully react. Wash by centrifugation with deionized water and collect the precipitate until the supernatant is neutral. After adding water, use an oscillator to vibrate for 30 minutes to further expand the distance between material layers. Finally, use 10 minutes of time to use 180W power to ultrasonically help the material to s...

Embodiment 2

[0095] A kind of Cu / Ti that present embodiment relates to 2 CT x The preparation method of catalyst material comprises the steps:

[0096] Step 1: Ti in a Teflon-lined (or plastic bottle) equipped with a stir bar 2 CT x Synthesis of the two-dimensional carrier: HCl and a certain mass of lithium fluoride were evenly mixed in a water bath at 20°C, and stirred for 60 minutes. Ti 2 AlC is slowly added to it, Ti 3 AlC 2 : The mass ratio of lithium fluoride is 1:1.6, the mass ratio of lithium fluoride to HCl is 1:20, stirred for 36h, and fully reacted. Wash by centrifugation with deionized water and collect the precipitate until the supernatant is neutral. After adding water, use an oscillator to vibrate for 1200 minutes to further expand the material layer spacing, and then use 60 minutes of time to use 80W power ultrasonic to help the material to stratify. After centrifugation to help the material to stratify, a single layer of Ti can be obtained. 2 CT x Colloidal solutio...

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Abstract

The invention discloses an MXene two-dimensional material and a Cu / MXene catalyst, and preparation methods and application thereof. The preparation method of the MXene two-dimensional material comprises the following steps: subjecting a uniformly-mixed reaction system containing lithium fluoride, acid and an Mxene precursor to a reaction, oscillating a mixture of a reaction product and water by adopting a mechanical oscillation technology, and carrying out ultrasonic treatment to obtain the MXene two-dimensional material. The invention also discloses the preparation method of the Cu / MXene catalyst. The preparation method of the Cu / MXene catalyst comprises the following steps: carrying out a mixed reaction on a copper source and an MXene two-dimensional material solution, carrying out centrifugal treatment, and drying a solid obtained after centrifugation so as to obtain the Cu / MXene catalyst. The two-dimensional catalyst material of the Cu / MXene catalyst has the characteristics of highdispersity and accurate control of the site position of an active component, and has good application prospects in the fields of a Sonogashira coupling reaction, reduction of 4-NP and the like.

Description

technical field [0001] The invention relates to a catalyst, in particular to a high-yield single-layer MXene two-dimensional material, a Cu / MXene catalyst material and a preparation method and application thereof, belonging to the technical field of catalyst preparation. Background technique [0002] Due to their special structure and surface properties, two-dimensional materials play an important role in the fields of energy storage and conversion, catalysis, adsorption and separation. Two-dimensional materials have a large aspect ratio, uniform thickness, and uniform order. They are hot topics that have emerged in the past ten years. Therefore, they are of great significance in the direction of catalysis and are good heterogeneous catalyst supports. However, the preparation of traditional supported two-dimensional material catalysts often requires surfactants and reducing agents, and the post-treatment method is complicated, requiring a large number of means to remove the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J32/00B01J27/22C07C2/76C07C15/50
CPCB01J27/22C07C2/76C07C2527/22C07C15/50
Inventor 张昉张庆萧蒋花婷王凯旋
Owner SHANGHAI NORMAL UNIVERSITY
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