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Preparation method and application of catalyst for photocatalytic degradation of VOCs

A catalyst and photocatalysis technology, applied in the field of photocatalysis, can solve the problems of low photocatalyst effective quantum yield and low light utilization rate, and achieve the effect of improving photocatalytic activity, improving catalytic performance and promoting effective separation

Inactive Publication Date: 2020-01-21
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The shortcomings of the catalysts used in the prior art, such as low utilization rate of visible light and low effective quantum yield of photocatalysts, limit its further application.

Method used

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  • Preparation method and application of catalyst for photocatalytic degradation of VOCs
  • Preparation method and application of catalyst for photocatalytic degradation of VOCs
  • Preparation method and application of catalyst for photocatalytic degradation of VOCs

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Effect test

Embodiment 1

[0027] A preparation method for photocatalytic degradation of VOCs catalyst, comprising the following steps:

[0028] Step 1, mix and dissolve PVP (1%) in 30ml ethylene glycol, stir magnetically until the dissolution is complete, then add 2.5mmolBi(NO 3 ) 3 ·5H 2 O continue to stir; at the same time 1mmolNa 2 WO 4 2H 2 O was dissolved in 20ml of ethylene glycol, and magnetically stirred until dissolved. the above Na 2 WO 4 2H 2 O was added dropwise to Bi(NO 3 ) 3 ·5H 2 O solution, magnetically stirred for 1 h, and mixed uniformly to obtain solution A.

[0029] Step 2, MoS 2 Prepared by hydrothermal method

[0030] 1.2g Na 2 MoO 4 2H 2 O and 1.6gNH 2 CSNH 2 Dissolve in 80ml of distilled water, stir for 1 hour, then put the solution into a polytetrafluoroethylene-lined autoclave with a hydrothermal temperature of 180°C and a hydrothermal time of 24 hours, separate the black precipitate by filtration at a speed of 10,000 rpm, and then use anhydrous Ethanol and ...

Embodiment 2

[0033]A preparation method for photocatalytic degradation of VOCs catalyst, comprising the following steps:

[0034] Step 1, mix and dissolve PVP (1%) in 30ml ethylene glycol, stir magnetically until the dissolution is complete, then add 2.5mmolBi(NO 3 ) 3 ·5H 2 O continue to stir; at the same time 1mmolNa 2 WO 4 2H 2 O was dissolved in 20ml of ethylene glycol, and magnetically stirred until dissolved. the above Na 2 WO 4 2H 2 O was added dropwise to Bi(NO 3 ) 3 ·5H 2 O solution, magnetically stirred for 1 h, and mixed uniformly to obtain solution A.

[0035] Step 2, MoS 2 Prepared by hydrothermal method, 1.2g of Na 2 MoO 4 2H 2 O and 1.6gNH 2 CSNH 2 Dissolve in 80ml of distilled water, stir for 1 hour, then put the solution into a polytetrafluoroethylene-lined autoclave with a hydrothermal temperature of 180°C and a hydrothermal time of 24 hours, separate the black precipitate by filtration, wash, and finally, dry and grind. The obtained product was dissolve...

Embodiment 3

[0039] A preparation method for photocatalytic degradation of VOCs catalyst, comprising the following steps:

[0040] Step 1, mix and dissolve PVP (1%) in 30ml ethylene glycol, stir magnetically until the dissolution is complete, then add 2.5mmolBi(NO 3 ) 3 ·5H 2 O continue to stir; at the same time 1mmolNa 2 WO 4 2H 2 O was dissolved in 20ml of ethylene glycol, and magnetically stirred until dissolved. the above Na 2 WO 4 2H 2 O was added dropwise to Bi(NO 3 ) 3 ·5H 2 O solution, magnetically stirred for 1 h, and mixed uniformly to obtain solution A.

[0041] Step 2, MoS 2 Prepared by hydrothermal method, 1.2g of Na 2 MoO 4 2H 2 O and 1.6gNH 2 CSNH 2 Dissolve in 80ml of distilled water, stir for 1h, then put the solution into a high-pressure Teflon-lined, hydrothermal temperature of 180°C, hydrothermal time of 24h, separate the black precipitate by filtration, wash, and finally, dry and grind to obtain The product was dissolved in ethylene glycol and sonicat...

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Abstract

The invention discloses a preparation method and application of a catalyst for photocatalytic degradation of VOCs. According to the method, a solvothermal method is utilized, wherein a MoS2 / Bi2WO6 photocatalytic material is prepared by changing the molar ratio of molybdenum to tungsten. The method is simple and easy to operate and high in yield, wherein the obtained catalyst is good in dispersityand has higher selectivity compared with pure Bi2WO6, so that the use amount of the catalyst is reduced, and the photocatalytic efficiency is improved; by means of to the MoS2 / Bi2WO6 catalytic material prepared by the method disclosed by the invention, the use amount of MoS2 has obvious difference on the photocatalytic degradation rate of toluene gas at normal temperature; the degradation efficiency has the best effect when the molar ratio is 1:5, and the photocatalytic activity of the method is greatly improved compared with that of a pure Bi2WO6 material under the same condition.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, and in particular relates to a preparation method and application of a photocatalytic degradation VOCs catalyst. Background technique [0002] Today, with the rapid development of society and economy, the environment on which human beings depend for survival has been damaged by different degrees of pollution, among which the most urgent problems to be solved are resource and environmental problems. In recent years, the application of semiconductor photocatalysis technology has attracted people's attention. Photocatalysis technology has the characteristics of low energy consumption, mild experimental conditions and no secondary pollution, so it is widely used in the degradation of volatile organic pollutants. Traditional photocatalysts such as TiO 2 , ZnO, etc. have a relatively narrow band gap, and the utilization rate of sunlight is low, only 4% of visible light. There is an urgent ne...

Claims

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Application Information

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IPC IPC(8): B01J27/051B01D53/86B01D53/72
CPCB01J27/051B01D53/72B01D53/8668B01J35/39
Inventor 许琦葛艳高佳朱瑜瑜
Owner YANCHENG INST OF TECH
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