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Preparation method of coralline MoS2 photocatalyst and MoS2-BiOBr heterojunction composite photocatalytic material

A technology of composite photocatalysis and photocatalysis, applied in the field of photocatalytic materials, can solve the problems of reducing the number of exposed active sites on the edge and reducing photocatalytic activity, and achieve the goal of improving photocatalytic efficiency, strong structural continuity and high catalytic rate Effect

Pending Publication Date: 2021-02-19
JINGDEZHEN CERAMIC INSTITUTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the MoS prepared by the existing technology 2 Most of them are flower-like cluster structures, which reduce the number of exposed active sites on the edge and reduce their photocatalytic activity

Method used

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  • Preparation method of coralline MoS2 photocatalyst and MoS2-BiOBr heterojunction composite photocatalytic material
  • Preparation method of coralline MoS2 photocatalyst and MoS2-BiOBr heterojunction composite photocatalytic material
  • Preparation method of coralline MoS2 photocatalyst and MoS2-BiOBr heterojunction composite photocatalytic material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029]This embodiment is a coral-like nano MoS2The preparation method of the photocatalyst is as follows:

[0030]Dissolve 0.0673g of ammonium molybdate pentahydrate, 0.0652g of thiourea, and 0.0366g of citric acid in 50mL of deionized water, stir and mix evenly with magnetic force, then transfer to a hydrothermal kettle for hydrothermal reaction, and hydrothermal reaction at 200℃ for 18h ; After the reaction is complete, cool to room temperature naturally, and the reaction product is washed alternately with distilled water and absolute ethanol, and dried at 80°C to obtain coral-like nano MoS2Photocatalytic materials.

Embodiment 2

[0032]This embodiment is a coral-like nano MoS2The preparation method of the photocatalyst is as follows:

[0033]Dissolve 0.0673g of ammonium molybdate pentahydrate, 0.0760g of thiourea, and 0.0576g of citric acid in 50mL of deionized water, stir and mix evenly with magnetic force, transfer to a hydrothermal kettle for hydrothermal reaction, and hydrothermal reaction at 180℃ for 24h ; After the reaction is complete, cool to room temperature naturally, and the reaction product is washed alternately with distilled water and absolute ethanol, and dried at 80°C to obtain coral-like nano MoS2Photocatalytic materials.

Embodiment 3

[0035]A MoS of this embodiment2-BiOBr heterojunction composite photocatalytic material preparation method, the steps are as follows:

[0036](1) Dissolve 0.9702g bismuth nitrate pentahydrate in 60mL deionized water to form a bismuth nitrate solution, dissolve 0.714g potassium bromide in 20mL deionized water to form a potassium bromide solution, and then add the above potassium bromide solution to the bismuth nitrate In the solution, stir and mix evenly, then transfer to a PTFE hydrothermal kettle for hydrothermal reaction at 140°C for 24 hours. After the reaction is complete, it is naturally cooled to room temperature. The reaction product is washed alternately with distilled water and absolute ethanol. Dry at 80℃, and obtain BiOBr after grinding;

[0037](2) Dissolve 0.0673g of ammonium molybdate pentahydrate, 0.0652g of thiourea, and 0.0366g of citric acid in 40mL of deionized water, add the above BiOBr and stir to dissolve, after ultrasonic dispersion, transfer to a hydrothermal kettle...

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Abstract

The invention discloses a preparation method of a coralline nano MoS2 photocatalyst, which comprises the following steps: dissolving ammonium molybdate, thiourea and citric acid in deionized water according to a molar ratio of 4: (60-65): (0.384-1.143), uniformly stirring and mixing, transferring into a hydrothermal kettle, and carrying out a hydrothermal reaction at 180-200 DEG C for 18-24 hours;and after the reaction is completed, naturally cooling to room temperature, and washing and drying a reaction product to obtain the coralloid nano MoS2 photocatalyst. In addition, the invention alsodiscloses a product prepared by using the preparation method, and a preparation method and a product of the MoS2-BiOBr heterojunction composite photocatalytic material. The prepared MoS2 with a coralloid structure has more exposed active sites, so that generated photo-induced electrons can quickly reach the active sites, and the catalytic efficiency of a photocatalyst is favorably improved. According to the prepared composite photocatalytic material, the recombination of photo-induced electron holes is effectively reduced through the formation of heterojunctions, so that the photocatalytic efficiency is effectively improved.

Description

Technical field[0001]The present invention relates to the technical field of photocatalytic materials, in particular to a MoS2Preparation method of photocatalyst and preparation method and product of composite photocatalytic material.Background technique[0002]With the continuous acceleration of the urbanization process and the rapid development of industrialization, various human activities have caused serious pollution to the environment. Although the concentration of organic pollutants discharged into the environment is low, they are highly toxic, and the pollutants need to be decomposed by efficient and "green" treatment technology. Photocatalysis has been identified as one of the high-efficiency "green" technologies for the degradation of organic matter because it can convert sunlight energy into chemical energy that promotes the degradation of organic pollutants, and has the advantages of low cost, good degradation effect, and no secondary pollution. .[0003]The crystal of BiOBr...

Claims

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Application Information

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IPC IPC(8): B01J27/051B01J27/132B01J35/02C01G39/06C02F1/30C02F1/32C02F101/30C02F101/38
CPCB01J27/051B01J27/132C01G39/06C02F1/32C02F1/30C01P2004/03C01P2002/72C02F2305/10C02F2101/38C02F2101/308C01P2004/64B01J35/00B01J35/30B01J35/40B01J35/39
Inventor 白明敏李伟信董伟霞谭灵王少华常启兵汪永清
Owner JINGDEZHEN CERAMIC INSTITUTE
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