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Enantioselective Photoelectrochemical Oxidative Degradation Method of Chiral Pesticide 2,4-Dipropionic Acid

An enantioselective, photoelectrochemical technology, applied in the direction of protective devices against harmful chemicals, can solve the problems of inability to achieve selective catalytic degradation, lack of selectivity, recognition, etc., and achieve clear and selective molecular imprinting sites. High performance and strong anti-interference ability

Inactive Publication Date: 2019-01-25
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In recent years, many scientists have attempted to overcome the lack of selectivity of photocatalytic oxidation technology by modifying or modifying the catalyst surface, but these methods can only identify a class of pollutants, or molecules with very different molecular structures, but for A pair of enantiomers of chiral molecules with the same molecular structure but different molecular spatial configurations. These methods are difficult to identify a single enantiomer in a pair of enantiomers, let alone achieve selective catalytic degradation

Method used

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  • Enantioselective Photoelectrochemical Oxidative Degradation Method of Chiral Pesticide 2,4-Dipropionic Acid
  • Enantioselective Photoelectrochemical Oxidative Degradation Method of Chiral Pesticide 2,4-Dipropionic Acid
  • Enantioselective Photoelectrochemical Oxidative Degradation Method of Chiral Pesticide 2,4-Dipropionic Acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A chiral pesticide-selective photoanode comprising 1D single-crystal TiO 2 Nanorod electrodes, and imprinted on 1D single crystal TiO 2 S-2,4-DPO imprinted sites on the surface of nanorod electrodes, fabricated by the following steps:

[0038] (1) Weigh concentrated hydrochloric acid and mix it with water, then add tetrabutyl titanate dropwise, stir at 450rpm for 1h, add template molecule S-2,4-dipropionic acid, concentrated hydrochloric acid, water, tetrabutyl titanate and The volume ratio of the added amount of S-2,4-dipropionic acid is 10:10:0.25:0.05, the concentration of concentrated hydrochloric acid is 37.5wt%, and the precursor solution is obtained;

[0039] (2) Transfer the precursor solution to a sealed reaction kettle, immerse the conductive side of the pretreated FTO in the solution, and react at 150°C for 5h;

[0040](3) After the reaction is completed, take out the product, wash it with deionized water, take out the surface residue, and calcinate at 500°...

Embodiment 2

[0043] A chiral pesticide-selective photoanode comprising 1D single-crystal TiO 2 Nanorod electrodes, and imprinted on 1D single crystal TiO 2 S-2,4-DPO imprinted sites on the surface of nanorod electrodes, fabricated by the following steps:

[0044] (1) Weigh concentrated hydrochloric acid and mix it with water, then add tetrabutyl titanate dropwise, stir at 300rpm for 0.5h, add template molecule S-2,4-dipropionic acid, concentrated hydrochloric acid, water, tetrabutyl titanate The volume ratio of the added amount of S-2,4-dipropionic acid is 10:15:0.4:0.1, the concentration of concentrated hydrochloric acid is 39wt%, and the precursor solution is obtained;

[0045] (2) Transfer the precursor solution to a sealed reaction kettle, immerse the conductive side of the pretreated FTO in the solution, and react at 120°C for 8 hours;

[0046] (3) After the reaction is completed, take out the product, rinse it with deionized water, take out the surface residue, and calcinate it at ...

Embodiment 3

[0048] A chiral pesticide-selective photoanode comprising 1D single-crystal TiO 2 Nanorod electrodes, and imprinted on 1D single crystal TiO 2 S-2,4-DPO imprinted sites on the surface of nanorod electrodes, fabricated by the following steps:

[0049] (1) Weigh concentrated hydrochloric acid and mix it with water, then add tetrabutyl titanate dropwise, stir at 600rpm for 1.5h, add template molecule S-2,4-dipropionic acid, concentrated hydrochloric acid, water, tetrabutyl titanate The volume ratio of the added amount of S-2,4-dipropionic acid is 10:5:0.1:0.01, the concentration of concentrated hydrochloric acid is 36wt%, and the precursor solution is obtained;

[0050] (2) Transfer the precursor solution to a sealed reaction kettle, immerse the conductive side of the pretreated FTO in the solution, and react at 180°C for 2 hours;

[0051] (3) After the reaction is completed, take out the product, wash it with deionized water, take out the surface residue, and calcinate it at 4...

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Abstract

The invention relates to a 2,4-dichlorprop chiral pesticide enantiomer selective photoelectrochemical oxidative degradation method. The 2,4-dichlorprop chiral pesticide enantiomer selective photoelectrochemical oxidative degradation method is characterized by comprising the following steps that 1, a chiral pesticide selective photoanode is prepared; and 2, selective photoelectrochemical oxidative degradation is conducted, specifically, a standard three-electrode system is built with the chiral pesticide selective photoanode prepared in the step 1 serving as a working electrode, and S-2,4-dichlorprop in a raceme of 2,4-dichlorprop is subjected to selective photoelectrochemical oxidative degradation under light illumination and external bias potential so that the concentration of R-2,4-dichlorprop in the raceme of the 2,4-dichlorprop can be improved. Compared with the prior art, the 2,4-dichlorprop chiral pesticide enantiomer selective photoelectrochemical oxidative degradation method can effectively improve the content of the R-2,4-dichlorprop in a 2,4-dichlorprop chiral pesticide enantiomer; and in addition, the photoanode is easy to prepare, good in stability, high in selectivity, catalytic efficiency and anti-interference capability, reusable and the like.

Description

technical field [0001] The invention relates to the technical field of degradation of chiral pesticides, in particular to a enantioselective photoelectrochemical oxidation degradation method of 2,4-dipropionic acid chiral pesticides. Background technique [0002] Chirality is not only a theoretical concept, but it is of great value in the fields of chemistry, life science, modern medicine, pharmacology and material science. The entire biological world is a "chiral" world, and many biochemical reactions in organisms occur under chiral environmental conditions. Biological macromolecules such as proteins, polysaccharides, nucleic acids, etc., and natural substances such as steroids, hormones, and sex hormones all have chirality. Among the 20 amino acids that make up proteins, except glycine, the other 19 are left-handed L-amino acids; polysaccharides and deoxyribose molecules are all in D configuration. The substances involved in the metabolism and regulation of organisms gen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A62D3/115A62D101/04A62D101/28
CPCA62D3/115A62D2101/04A62D2101/28
Inventor 赵国华代卫国
Owner TONGJI UNIV
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