MXene doping-based composite material and preparation method thereof

A technology of composite materials and raw materials, applied in the field of composite photocatalysts, can solve problems such as underutilization, achieve uniform distribution, low requirements for equipment and equipment, and improve photocatalytic activity.

Inactive Publication Date: 2021-06-22
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing MXene / TiO 2 The preparation method of the composite material is in-situ hydrothermal, blast drying and oxidation synthesis of TiO 2 , underutilized TiO 2 highly active {001} facet

Method used

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  • MXene doping-based composite material and preparation method thereof
  • MXene doping-based composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] (1) At room temperature, add 2gLiF into a polytetrafluorobeaker filled with 40mL, 9mol / L hydrochloric acid, stir for 3min, then add 2g Mo 2 Ga 2 C. Stir evenly; put the obtained mixed solution into a 37°C constant temperature magnetic stirring water bath, put a polytetrafluoroethylene rotor, stir and react for 100 hours, and obtain the MXene colloidal solution;

[0037] (2) Centrifuge the MXene colloid solution at 4000rmp for 10min, add deionized water and wash it repeatedly 5 times until the pH of the solution is ≥ 6, pour off the supernatant, and at 4°C, separate the precipitates from absolute ethanol and Ultrasonic dispersion with 600W power in deionized water for 2 hours to obtain a suspension solution, centrifuge the suspension solution at 8000rmp for 60min to obtain a blue-black MXene sheet colloid solution;

[0038](3) The blue-black MXene sheet colloidal solution was self-assembled by vacuum filtration using a cellulose carbonate filter membrane with a pore siz...

Embodiment 2

[0044] (1) At room temperature, add 2gLiF into a polytetrafluorobeaker filled with 40mL, 9mol / L hydrochloric acid, stir for 3min, then add 2g Mo 2 Ga 2 C. Stir evenly; put the obtained mixed solution into a 37°C constant temperature magnetic stirring water bath, put a polytetrafluoroethylene rotor, stir and react for 100 hours, and obtain the MXene colloidal solution;

[0045] (2) Centrifuge the MXene colloid solution at 4500rmp for 12min, add deionized water and wash it repeatedly 7 times until the pH of the solution is ≥ 6, pour off the supernatant, and at 4°C, separate the precipitates from absolute ethanol and then Ultrasonic dispersion in deionized water with 700W power for 1.5h to obtain a suspension solution, centrifuge the suspension solution at 8500rmp for 45min to obtain a blue-black MXene lamellar colloid solution;

[0046] (3) The blue-black MXene sheet colloid solution was self-assembled by vacuum filtration using a cellulose carbonate filter membrane with a pore...

Embodiment 3

[0052] (1) At room temperature, add 2gLiF into a polytetrafluorobeaker filled with 40mL, 9mol / L hydrochloric acid, stir for 3min, then add 2g Mo 2 Ga 2 C. Stir evenly; put the obtained mixed solution into a 37°C constant temperature magnetic stirring water bath, put a polytetrafluoroethylene rotor, stir and react for 100 hours, and obtain the MXene colloidal solution;

[0053] (2) Centrifuge the MXene colloid solution at 5000rmp for 15min, add deionized water and wash it repeatedly 10 times until the pH of the solution is ≥ 6, pour off the supernatant, and at 4°C, separate the precipitate from absolute ethanol and then Ultrasonic dispersion with 800W power in deionized water for 1h to obtain a suspension solution, centrifuge the suspension solution at 9000rmp for 30min to obtain a blue-black MXene lamellar colloidal solution;

[0054] (3) The blue-black MXene sheet colloidal solution was self-assembled by vacuum filtration with a cellulose carbonate filter membrane with a por...

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Abstract

The invention provides an MXene doping-based composite material and a preparation method thereof, and the preparation method comprises the following steps: taking an MAX phase material as a raw material, and preparing an MXene colloidal solution through etching and stripping; performing centrifuging, washing and ultrasonic resuspension on the MXene colloidal solution for multiple times, then carrying out self-assembly under vacuum filtration, and carrying out vacuum drying on an obtained filter cake to obtain MXene paper; dissolving the MXene paper in an isopropanol solution, adding tetrabutyl titanate, uniformly mixing, dropwise adding a hydrofluoric acid solution, carrying out sealed hydrothermal treatment after dropwise adding, and performing cooling, washing and drying to obtain a target product. According to the MXene doping-based composite material and the preparation method thereof, the preparation process is simple, the requirements on instruments and equipment are low, the recombination efficiency of photon-generated carriers can be effectively improved, and the photocatalytic activity of a TiO2-based composite catalyst is improved.

Description

technical field [0001] The invention belongs to the field of composite photocatalysts, in particular to a composite material based on MXene doping and a preparation method thereof. Background technique [0002] As a potential energy conversion and environmental treatment technology, photocatalysis has the characteristics of directly utilizing sunlight and converting light energy into electrical energy or chemical energy, and has attracted widespread attention. In recent years, scientists have achieved rich results in the use of photocatalytic materials to split water to produce hydrogen and degrade pollutants. [0003] At present, the materials with photocatalytic activity are mainly some semiconductors, including ZnO, TiO 2 、WO 3 , SnO 2 etc., where TiO 2 Semiconductors have attracted much attention in the research of photocatalytic materials due to their advantages of easy availability, non-toxicity, low cost and stable chemical properties. But nano TiO 2 The band ga...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/22C02F1/32C01B3/04C02F101/30C02F101/38
CPCB01J27/22B01J35/004C01B3/042C01B2203/0277C02F1/32C02F2101/30C02F2101/40C02F2305/10Y02E60/36
Inventor 王灿孟格路思艺刘力铭
Owner TIANJIN UNIV
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