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Application of Fe3O4/mTiO2 magnetic mesoporous nanometer material in degradation of pesticide

A nanomaterial and mesoporous technology, applied in the field of micro-nano photocatalytic materials, can solve the problems of difficult nano-TiO2 materials, low processing efficiency, separation, etc., and achieve the effects of simple and mature preparation process, high catalytic efficiency and low price.

Inactive Publication Date: 2016-04-13
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Someone used Au-Pd modified TiO 2 Nanotubes are used to degrade malathion, but it requires 4 hours of ultraviolet light, and the treatment efficiency is low; some people use UV / TiO 2 / H 2 o 2 Process (TiO 2 1.5g / L, H 2 o 2 100mg / L, pH=6, irradiation time 300min) to degrade pesticide wastewater, and has a certain COD and TOC removal effect, but the process requires the use of H 2 o 2 , The irradiation time is up to 5h, and the treatment efficiency is relatively low
In addition, nano-TiO as a catalyst 2 Material is difficult to separate from the processing system

Method used

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  • Application of Fe3O4/mTiO2 magnetic mesoporous nanometer material in degradation of pesticide
  • Application of Fe3O4/mTiO2 magnetic mesoporous nanometer material in degradation of pesticide
  • Application of Fe3O4/mTiO2 magnetic mesoporous nanometer material in degradation of pesticide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Fe 3 o 4 / mTiO 2 Magnetic mesoporous nanomaterials are to the adsorption degradation of omethoate pesticide wastewater (described omethoate, its chemical name is: O, O-dimethyl-S-[2-(methylamino)-2-oxygen On behalf of ethyl] phosphorothioate, the chemical formula is C 5 h 12 NO 4 PS, the CAS number is 1113-02-6)

[0039] (1) Fe 3 o 4 / mTiO 2 Fabrication of Magnetic Mesoporous Nanomaterials:

[0040] ① Mix and dissolve 2.750g of ferric chloride, 9.250g of ammonium acetate and 0.971g of sodium citrate in 150ml of ethylene glycol, and stir vigorously at 170°C for 1 hour to obtain a black solution;

[0041] ②The black solution was sealed and reacted at 200°C for 20h; then cooled, washed 2-3 times with ethanol and deionized water, and dried under vacuum at 60°C to obtain Fe with an average diameter of 280nm 3 o 4 nanospheres;

[0042] ③Add 85mgFe 3 o 4 Nanospheres were dissolved in a mixed solution of 100ml ethanol and 45ml acetonitrile;

[0043] ④Add 0.65ml o...

Embodiment 2

[0057] Example 2: Fe 3 o 4 / mTiO 2 Adsorption and degradation of monocrotophos pesticide wastewater by magnetic mesoporous nanomaterials

[0058] Monocrotophos, its chemical name is: O, O-dimethyl-O-(1-methyl-2 methylcarbamoyl) vinyl phosphate, its chemical formula is C 7 h 14 NO 5 P, CAS number is 6923-22-4.

[0059] Fe 3 o 4 / mTiO 2 The preparation method of magnetic mesoporous nanometer material and this material are used for the absorption degradation test process of monocrotophos pesticide are all the same as embodiment 1, detect through high performance liquid chromatography (HPLC) and total organic carbon analyzer, the result is as follows Figure 5 -B, 6-B, 7-B, the results show that when Fe 3 o 4 / mTiO 2 When the concentration was 100mg / L, after 30min of ultraviolet irradiation, monocrotophos was degraded by 64.38%, and the removal rate of TOC reached 50.3%; when Fe 3 o 4 / mTiO 2 When the concentration was 50mg / L, the degradation rate of monocrotophos wa...

Embodiment 3

[0060] Example 3: Fe 3 o 4 / mTiO 2 Adsorption and degradation of methyl parathion pesticide wastewater by magnetic mesoporous nanomaterials

[0061] Methyl parathion, its chemical name is: O,O-dimethyl-O-(4-nitrophenyl) phosphorothioate, its chemical formula is C 8 h 10 NO 5 PS, the CAS number is 298-00-0.

[0062] Fe 3 o 4 / mTiO 2 The preparation method of the magnetic mesoporous nanomaterial and the adsorption and degradation test process of the material used for methyl parathion pesticide are all the same as in Example 1, and are detected by high performance liquid chromatography (HPLC) and total organic carbon analyzer, the result Such as Figure 5 -C, 6-C, 7-C, the results show that when Fe 3 o 4 / mTiO 2 When the concentration was 100mg / L, after 30min of ultraviolet irradiation, methyl parathion was degraded by 49.74%, and the TOC removal rate reached 39.7%; when Fe 3 o 4 / mTiO 2 When the concentration was 50mg / L, the degradation rate of methyl parathion wa...

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Abstract

The invention discloses application of a Fe3O4 / mTiO2 magnetic mesoporous nanometer material in degradation of pesticide and belongs to the technical field of micro-nanometer photocatalytic materials. The Fe3O4 / mTiO2 magnetic mesoporous nanometer material is used as a photocatalyst to be applied to adsorption and degradation of organophosphorus pesticide; the Fe3O4 / mTiO2 magnetic mesoporous nanometer material relies on surface mesoporous TiO2 to absorb the organophosphorus pesticide to the TiO2 mesoporous surface; then, under the irradiation of ultraviolet light, TiO2 active sites are excited to degrade absorbed organophosphorus molecules to generate low-toxicity or even non-toxic products; after the reaction, the photocatalyst can be adsorbed and separated through a magnet. The operation is simple and easy to perform. By applying the Fe3O4 / mTiO2 magnetic mesoporous nanometer material to adsorption and degradation of the organophosphorus pesticide, the application is novel and advanced, practical significance is achieved, and the material preparation process is simple and mature, easy to operate, low in cost and free of secondary pollution.

Description

technical field [0001] The present invention relates to a kind of Fe 3 o 4 / mTiO 2 The application of magnetic mesoporous nanomaterials in the degradation of pesticides belongs to the technical field of micro-nano photocatalytic materials. Background technique [0002] Organophosphorus pesticides have become the most widely used large-tonnage pesticides in agricultural production in recent years due to their characteristics of various types, high efficacy, wide application, and easy decomposition, and can effectively control more than 100 kinds of pests. With the extensive use of organophosphorus pesticides, their pollution to soil, surface water, groundwater and other water resources in the environment has attracted widespread attention, and has become a focus and hot issue in the field of environmental protection research. [0003] At present, the organic phosphorus pesticide wastewater treatment methods generally include biochemical treatment and advanced oxidation tre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745B01J35/00C02F1/32C02F101/30
CPCC02F1/32B01J23/745C02F2101/306C02F2305/10B01J35/39B01J35/33
Inventor 孙秀兰郑玲玲皮付伟孙嘉笛张银志纪剑
Owner JIANGNAN UNIV
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