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A kind of preparation method of vanadate composite mxene airgel photocatalyst

A photocatalyst and vanadate technology, applied in the field of nanocomposite materials and photocatalysis, can solve the problems of low photocatalytic efficiency, no co-catalyst found, etc., and achieve the effects of high photodegradation efficiency, improved photodegradation efficiency, and high application potential.

Active Publication Date: 2021-05-25
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the low photocatalytic efficiency is still the main obstacle limiting its application.
One of the ways to solve this problem is to combine it with a co-catalyst to improve the overall catalytic performance, but no suitable co-catalyst has been found
[0004] Ti 3 C 2 Mxene is an emerging two-dimensional material with a graphene-like structure. It has the advantages of high specific surface area and good electrical conductivity. However, it has not been reported to use it as a co-catalyst to improve photocatalytic performance by combining it with other materials.

Method used

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  • A kind of preparation method of vanadate composite mxene airgel photocatalyst
  • A kind of preparation method of vanadate composite mxene airgel photocatalyst
  • A kind of preparation method of vanadate composite mxene airgel photocatalyst

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Embodiment 1

[0025] A kind of preparation method of vanadate composite Mxene airgel photocatalyst, concrete steps are as follows:

[0026] (1) Add 50mg Ti 3 C 2 Mxene was added to 5mL deionized water, Ti 3 C 2 Mxene can be purchased, ultrasonically disperse at room temperature for 10 minutes under the protection of inert gas nitrogen, and then add 6 mg of soluble metal salt silver nitrate, stir at room temperature for 30 minutes before use, and record it as precursor solution A;

[0027] (2) Add 10mg of ammonium metavanadate to 5mL of deionized water, stir at 50°C for 30min, completely dissolve and set aside for use, which is referred to as Precursor B;

[0028] (3) Add the precursor solution B to the precursor solution A dropwise, stir for 1 hour and then transfer it to a polytetrafluoroethylene-lined reactor for reaction. The reaction temperature is 180°C and the reaction time is 24 hours to obtain the hydrogel precursor ;

[0029] (4) Put the hydrogel precursor obtained after the...

Embodiment 2

[0034] A kind of preparation method of vanadate composite Mxene airgel photocatalyst, concrete steps are as follows:

[0035] (1) Add 200mg Ti 3 C 2 Add Mxene to 20mL of deionized water, ultrasonically disperse at room temperature for 20min under the protection of inert gas argon, then add 30mg of soluble metal salt bismuth nitrate, stir at room temperature for 45min before use, and record it as precursor solution A;

[0036] (2) Add 100mg of sodium orthovanadate into 20mL of deionized water, stir at 60°C for 20min, completely dissolve and set aside, record as Precursor B;

[0037] (3) Add Precursor B to Precursor A drop by drop, stir for 1.5 hours, then transfer to a polytetrafluoroethylene-lined reactor for reaction, the reaction temperature is 160°C, and the reaction time is 12 hours;

[0038] (4) Put the hydrogel precursor obtained after the hydrothermal reaction in a dialysis bag (molecular weight cut-off of 3500KD), dialyze in deionized water for 24 hours to remove im...

Embodiment 3

[0040] A kind of preparation method of vanadate composite Mxene airgel photocatalyst, concrete steps are as follows:

[0041] (1) Add 400mg Ti 3 C 2 Add Mxene to 40mL of deionized water, ultrasonically disperse at room temperature for 30min under the protection of inert gas nitrogen, then add 60mg of soluble metal salt indium chloride, stir at room temperature for 60min before use, and record it as precursor solution A;

[0042] (2) Add 100mg of sodium orthovanadate into 40mL of deionized water, stir at 80°C for 10 minutes, completely dissolve and set aside for use, which is referred to as Precursor B;

[0043] (3) Add Precursor B to Precursor A drop by drop, stir for 1 hour, then transfer to a polytetrafluoroethylene-lined reactor for reaction, the reaction temperature is 140°C, and the reaction time is 12 hours;

[0044] (4) Put the hydrogel precursor obtained after the hydrothermal reaction in a dialysis bag (molecular weight cut-off of 3500KD), dialyze in deionized wate...

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Abstract

The invention discloses a method for preparing a vanadate composite Mxene airgel photocatalyst, which belongs to the field of nanocomposite materials and photocatalysis. Ti 3 C 2 Mxene is combined with vanadate in situ, and the vanadate composite Mxene airgel catalyst is obtained after dialysis to remove impurities and freeze-drying; the catalyst prepared by the present invention has a high specific surface area and shows higher photodegradation efficiency. Compared with traditional powdery photocatalysts, the airgel photocatalyst of the present invention is easier to recycle, and shows higher application potential in the field of photocatalytic water treatment.

Description

technical field [0001] The invention relates to a method for preparing a vanadate composite Mxene airgel photocatalyst, which belongs to the field of nanocomposite materials and photocatalysis. Background technique [0002] Compared with traditional sewage treatment technology, photocatalytic water treatment technology can remove various pollutants without secondary pollution, low energy consumption, fast response, simple operation and high efficiency. Conventional photocatalyst photocatalyst technology uses semiconductor catalysts such as titanium oxide, zinc oxide, oxide, tin sulfide, etc. When the catalyst receives a certain energy of light, the electrons in the valence band are excited to the conduction band, and the valence band generates holes. , electrons and holes are reductive and oxidative respectively, which excite water and oxygen into more active ion matrix and destroy the structure of organic matter. [0003] Vanadate catalyst is a catalyst with low raw materi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/224B01J35/10C02F1/72C02F1/30C02F101/38C02F101/36
CPCB01J27/224C02F1/725C02F1/30C02F2101/308C02F2101/38C02F2101/36C02F2101/40C02F2305/10B01J35/61B01J35/39
Inventor 鲍瑞刘鹏易健宏
Owner KUNMING UNIV OF SCI & TECH
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