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Preparation method and application of magnetic ferroferric oxide nanoparticle-based pH-responsive imprinted material

A technology of ferric tetroxide and nanoparticles, applied in chemical instruments and methods, alkali metal oxides/hydroxides, inorganic chemistry, etc. Effects of pH-responsive performance, increasing specific adsorption sites, and improving adsorption

Active Publication Date: 2019-05-14
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the deficiencies in the prior art, the present invention aims to solve one of the problems; the present invention provides a method for preparing a molecularly imprinted polymer material based on mesoporous silica-coated iron ferric oxide nanoparticles, which solves the problem of matrix material surface, it is difficult to directly coat the molecularly imprinted polymer layer, and at the same time realize the sensitive detection of sulfamethoxazole in milk

Method used

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  • Preparation method and application of magnetic ferroferric oxide nanoparticle-based pH-responsive imprinted material
  • Preparation method and application of magnetic ferroferric oxide nanoparticle-based pH-responsive imprinted material
  • Preparation method and application of magnetic ferroferric oxide nanoparticle-based pH-responsive imprinted material

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Effect test

Embodiment 1

[0036] Step 1, Fe 3 o 4 Preparation of nanoparticles: 1.2g FeCl 3 ·6H 2 O was added to 50mL of ethylene glycol, and stirred for 20min until the solution was clear, followed by adding 3.2g of sodium acetate (NaAc), 0.5g of trisodium citrate (NaAc 3 Cit) and 0.7g polyethylene glycol, after being magnetically stirred for 40min, the mixed solution was transferred to a stainless steel autoclave lined with polytetrafluoroethylene, reacted at a high temperature of 180°C for 8h, and then naturally cooled to room temperature; finally, a black precipitate The material was washed with distilled water and ethanol, and dried in vacuum at 60 °C to obtain Fe 3 o 4 Nanoparticles;

[0037] Step 2, the Fe obtained in step 1 3 o 4 Add 0.25 g of nanoparticles to a mixed solution containing 0.5 g of cetyltrimethylammonium bromide (CTAB), 2.5 mL of ammonia water, 60 mL of ethanol and 15 mL of deionized water. After ultrasonication for 10 min, 2.5 mL of orthosilicic acid Tetraethyl ester (TE...

Embodiment 2

[0042] Step 1, Fe 3 o 4 Preparation of nanoparticles: 1.35g FeCl 3 ·6H 2 O was added to 60mL of ethylene glycol, and stirred for 30min until the solution was clear, followed by adding 3.6g of sodium acetate (NaAc), 0.72g of trisodium citrate (NaAc 3 Cit) and 1g polyethylene glycol; after magnetic stirring for 50min, the mixed solution was transferred to a stainless steel autoclave lined with polytetrafluoroethylene, and after a high temperature reaction at 200°C for 10h, it was naturally cooled to room temperature; finally, a black precipitate Wash with distilled water and ethanol respectively, and dry in vacuum at 65 °C to obtain Fe 3 o 4 Nanoparticles;

[0043] Step 2, the Fe obtained in step 1 3 o 4 Add 0.3 g of nanoparticles to a mixed solution containing 0.6 g of cetyltrimethylammonium bromide (CTAB), 3 mL of ammonia water, 80 mL of ethanol and 20 mL of deionized water. After ultrasonication for 15 min, 3 mL of tetraethylorthosilicate Ester (TEOS) was slowly added...

Embodiment 3

[0048] Step 1, Fe 3 o 4 Preparation of nanoparticles: 1.5g FeCl 3 ·6H 2 O was added to 80mL of ethylene glycol, and stirred for 40min until the solution was clear, followed by adding 3.9g of sodium acetate (NaAc), 0.89g of trisodium citrate (NaAc 3 Cit) and 1.2g polyethylene glycol; after magnetic stirring for 60min, the mixed solution was transferred to a stainless steel autoclave lined with polytetrafluoroethylene. After reacting at a high temperature of 220°C for 12 hours, it was naturally cooled to room temperature. Finally, the black precipitate was washed with distilled water and ethanol, and dried in vacuum at 75°C to obtain Fe 3 o 4 Nanoparticles;

[0049] Step 2, the Fe obtained in step 1 3 o 4 Add 0.35 g of nanoparticles to a mixed solution containing 0.7 g of cetyltrimethylammonium bromide (CTAB), 5 mL of ammonia water, 100 mL of ethanol and 25 mL of deionized water. After ultrasonication for 30 min, 3.5 mL of orthosilicate Ethyl ester (TEOS) was slowly add...

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Abstract

The invention belongs to the technical field of preparation of detection materials, and relates to a preparation method of a magnetic ferroferric oxide nanosphere-based novel pH-responsive imprinted material. The preparation method comprises the following steps: firstly preparing ferroferric oxide nanoparticles and synthesizing mesoporous silicon dioxide coated ferroferric oxide nanospheres, and then performing chemical double bond modification on the mesoporous silicon dioxide coated ferroferric oxide nanospheres; finally, preparing the magnetic nanosphere-based pH-responsive imprinted material. The pH-responsive imprinted material prepared according to the preparation method provided by the invention can solve the problem that the surface of a base material is difficult to be directly coated with a molecularly imprinted polymer layer; the imprinted material adopts a significant core-shell structure consistent with the purpose of the invention; in addition, through combination of theperformance of the molecularly imprinted material and a pH-responsive intelligent material, the pH-responsive imprinted material is successfully applied to efficient detection of sulfamethoxazole.

Description

technical field [0001] The invention belongs to the technical field of detection material preparation, and specifically refers to a preparation method and application of a magnetic iron ferric oxide nanoparticle-pH responsive molecular imprinted material. Background technique [0002] Sulfonamides (SAs) are synthetic antimicrobial agents used to prevent and treat bacterial infections in humans. Relatively few sulfonamides are approved for use in food-producing mammals. Compared with other classes of antimicrobials, sulfonamides are widely used in veterinary medicine. Sulfonamides are commonly used in the prophylaxis and treatment of acute systemic or local infections, and as additives to feed and drinking water in food-producing species. Sulfamethoxazole (SMX) is a typical sulfa antibiotic widely used in agricultural production; inevitably, sulfamethoxazole residues will appear in milk or meat; Residue has become an urgent task. At present, sulfamethoxazole and other sul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/26C08F292/00C08F220/18C08F230/06C08F222/38B01J20/281B01J20/28C08L51/10
Inventor 杨文明栾雨陆毅柳天舒庆玉洁曹云飞
Owner JIANGSU UNIV
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