Production and preparation method of pesticide residue removal agent

A pesticide residue and remover technology, applied in the field of pollutant treatment, can solve the problems of large particle size, low adhesion, large particle size of titanium dioxide, etc., and achieve the effect of small particle size and stable dispersion

Inactive Publication Date: 2019-02-05
孙梓译 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. The particle size of the prepared titanium dioxide is relatively large, generally 5-100 nanometers, its specific surface area is small, the number of surface atoms is small, and the surface effect of ultrafine particles is not significant. On the one hand, the less light energy absorbed, the e- and The smaller the density of h+ pairs, on the other hand, the less reactants are adsorbed, and the concentration of oxidized or reduced substances is also less, so the visible light catalytic activity will decrease.
[0005] 2. High manufacturing cost, low processing effect and slow processing speed, which directly lead to increased processing cost and greatly reduced economic value
[0006] 3. The large particle size results in low adhesion. The nano-titanium dioxide prepared by the prior art needs to be added with an adhesive, which is poisonous to the human body and livestock, so it is limited in the application field.
[0007] In addition, although there are many literatures that propose the use of various metal doping methods to improve TiO 2 Photocatalytic activity, such as copper doping, cobalt doping, nickel doping, etc., but on the one hand, although these doping methods have shown a certain improvement in laboratory testing, due to the complexity of the actual use environment, It is also easy to further reunite, and the actual lifting effect produced in it is limited. On the other hand, most of these doping elements are harmful to the human body, and may cause secondary pollution to water quality or soil during use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Step 1: Dissolve 2.35 g of isopropyl titanate in 40 g of absolute ethanol to prepare A solution. At the same time, 0.0015 g of silver nitrate was dissolved in 1 g of glycerol, and stirred for 90 minutes to obtain solution B.

[0038] Step 2: Dissolve 0.3 g of tetraethyl orthosilicate in 20 g of absolute ethanol, stir for alcoholysis for 80 minutes, add 0.08 g of 10% wt hydrochloric acid and 5 g of water, and stir for 42 minutes for hydrolysis. Prepare C solution.

[0039] In the third step, the A solution and the B solution are dropped into the part C solution at a rate of 3-10 per second, and the hydrolysis is rapidly stirred. The isopropyl titanate is slowly hydrolyzed into titanium dioxide, which is coated with a monolayer of orthosilicate hydrolyzate. After the dropwise addition, the mixture was stirred for 12 hours to obtain a mixed solution H1.

[0040] The fourth step is to take 0.3 grams of diethylenetriaminopropyltrimethoxysilane, add 1 gram of water, stir a...

Embodiment 2

[0044] The 2.35 g of isopropyl titanate in Example 1 was replaced by 4 g of butyl titanate, and the others were the same as in Example 1 to prepare an aqueous dispersion with a titanium dioxide concentration of 0.8%.

Embodiment 3

[0046] The 0.0015 gram of silver nitrate in Example 2 was replaced by 0.002 gram of silver chloride, and the others were the same as in Example 1 to obtain an aqueous dispersion whose concentration of titanium dioxide was 0.8%.

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Abstract

The invention provides a production and preparation method of a pesticide residue removal agent. The production and preparation method comprises the steps that a silicon oxide sol water solution is pre-formed, a silver-containing titanium oxide precursor solution is added into the silicon oxide sol water solution, thus the hydrolysis process of a titanium oxide precursor and generation of titaniumoxide particles are limited by a silicon oxide sol network, and overgrowth of the titanium oxide particles is controlled accordingly. The particle size of prepared nanometer titanium dioxide is smaller than 3 nm, the catalytic activity is high, and dispersion is stable. Ferric oxide nanoparticles are introduced into the preparation process to form a complex with titanium dioxide particles, the reaction catalytic activity is enhanced, and parts of reaction products can be flocculated and precipitated and thus are conveniently removed.

Description

technical field [0001] The invention belongs to the field of pollutant treatment, and in particular relates to a production and preparation method of a pesticide residue remover. Background technique [0002] In the process of agricultural modernization, with the use of a large number of pesticides, while ensuring the high yield and harvest of agricultural products, many environmental problems such as water pollution and land pollution caused by these pesticides have become increasingly prominent. In agricultural production, pesticides These pesticides are generally directly discharged into rivers and even into groundwater systems, causing serious environmental pollution. In recent years, scientists have begun to study the use of photocatalysts to decompose pesticides to solve the problem of environmental pollution. [0003] In 1967, Professor Kenichi Honda of the University of Tokyo and Akira Fujishima, a doctoral student, discovered that the electrolysis of water could be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/38A62D3/17
CPCB01J35/004A62D3/17B01J21/063B01J23/745B01J31/0208B01J31/06B01J31/38B01J35/0006
Inventor 孙梓译王鹏
Owner 孙梓译
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