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Photo-enzyme integrated nano-catalyst as well as preparation and application thereof

A nano-catalyst and photocatalyst technology, applied in the direction of physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, chemical instruments and methods, etc., can solve the problems of lack of treatment methods, secondary pollution, and serious human health problems Risk and other issues, to achieve the effect of avoiding secondary pollution, improving degradation ability, and good treatment effect

Active Publication Date: 2020-05-19
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the enzymatic degradation of organophosphorus pesticides, the hydrolyzed products usually contain p-nitrophenol. As an intermediate of medicine, dyestuff and petrochemical industry, p-nitrophenol still poses a major health risk to the human body and becomes secondary pollution thing
At this time, for the sake of environmental safety, it is necessary to reduce the harmful secondary pollutants into less harmful compounds or achieve complete mineralization during the degradation of organophosphorus pesticides, so as to realize the effective treatment of organophosphorus pesticides, but there is still a lack of relevant treatment means

Method used

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  • Photo-enzyme integrated nano-catalyst as well as preparation and application thereof
  • Photo-enzyme integrated nano-catalyst as well as preparation and application thereof
  • Photo-enzyme integrated nano-catalyst as well as preparation and application thereof

Examples

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example 1

[0074] In this example, the semiconductor visible light photocatalyst uses BiOBr, and the organophosphorus hydrolase is a commercially available enzyme, and specifically adopts the organic phosphorus degrading enzyme biochemical decontaminant produced by Tianjin Zhangda Science and Technology Development Co., Ltd., model PG -OPH-D1, the main component is organophosphate degrading enzyme.

[0075] The specific preparation process of BiOBr is as follows:

[0076] 2mmol Bi(NO 3 ) 3 ·5H 2 O was dissolved in 70 mL of ethylene glycol, and 2 mmol of C16MIMBr was added to the above solution with stirring to obtain a mixture. Then, the mixture was sonicated and stirred for 30 minutes until all substances were uniformly dispersed, then the resulting mixture was transferred to a Teflon-lined stainless steel autoclave, and kept at 160 °C for 12 hours in an electric blast drying oven for reaction. After the reaction was completed, the reaction solution was cooled to room temperature, c...

example 2

[0079] In this example, the semiconductor visible light photocatalyst adopts titanium dioxide with controlled morphology, specifically Au-SiO with a hollow spherical shell structure. 2 @TiO 2 . The titanium dioxide after the morphology control has a hollow structure and a large specific surface area, which can provide a large number of active sites for the attachment of enzymes. At the same time, the gold loaded on the spherical shell can also realize the adjustment of the band gap width of titanium dioxide. So that it can have catalytic activity under visible light.

[0080] The organophosphate hydrolase in this example is the same as in Example 1.

[0081] The preparation process of the titanium dioxide controlled by the morphology of this example is as follows:

[0082] First, 0.15g of SiO 2Disperse in 200mL of ethanol, mix with 900μL of 28wt% concentrated ammonia solution in ultrasonic for 15min, then add 2mL of n-butyl titanate, stir at 45°C for 24h to obtain amorphou...

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Abstract

The invention provides a photo-enzyme integrated nano-catalyst. The photo-enzyme integrated nano-catalyst comprises a semiconductor visible-light photocatalyst which is used as an immobilization carrier, has a hierarchical structure and is biocompatible, and organophosphorus hydrolase which is immobilized and combined on the immobilization carrier. The invention also provides a preparation methodof the photo-enzyme integrated nano-catalyst and application of the photo-enzyme integrated nano-catalyst in organophosphorus pesticide degradation. The photo-enzyme integrated nano-catalyst can be used for degrading organophosphorus pesticide, can degrade secondary pollutant p-nitrophenol in organophosphorus pesticide degradation, can realize effective degradation treatment of organophosphorus pesticide, avoidsecondary pollution and has a good application effect.

Description

technical field [0001] The invention relates to the technical field of pesticide catalytic degradation, in particular to a photoenzyme-integrated nanocatalyst, and the invention also relates to a preparation method of the above photoenzyme-integrated nanocatalyst and an application of the photoenzyme-integrated nanocatalyst in the degradation of organophosphorus pesticides. Background technique [0002] Pesticides are widely used on target organisms in agriculture for their high efficiency and acute toxicity to improve agricultural production, with the continuous use of pesticides, the residual pesticides accumulated through air, water and soil will cause serious damage to the environment and human health , so it is extremely important to eliminate or degrade pesticide residues in the ecosystem. [0003] Organophosphorus pesticides are currently the most widely used pesticides, accounting for about 34% of the global pesticide usage. Residual organophosphorus pesticides can ...

Claims

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Application Information

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IPC IPC(8): B01J31/26B01J31/38A62D3/02A62D3/30A62D101/04A62D101/26A62D101/28
CPCB01J31/003B01J31/26B01J31/38A62D3/02A62D3/30A62D2101/04A62D2101/28A62D2101/26B01J35/39
Inventor 姜艳军关素敏郑晓冰高静张颖
Owner HEBEI UNIV OF TECH
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