Preparation method of functionalized magnetic nanocomposite ferroferric oxide/silicon dioxide-APTMS

A magnetic nano and composite material technology, applied in the directions of alkali metal oxides/hydroxides, chemical instruments and methods, nanotechnology, etc. Simple equipment and convenient operation

Pending Publication Date: 2022-05-13
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] For magnetic nano-Fe 3 o 4 Particles have strong polymerization characteristics and are easy to agglomerate, with the presence of nano-Fe 3 o 4 Particles are easily oxidized, and the agglomeration phenomenon is serious, causing problems such as reduced reactivity. The invention provides a functionalized magnetic nanocomposite Fe 3 o 4 @SiO 2 - Preparation method of APTMS

Method used

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  • Preparation method of functionalized magnetic nanocomposite ferroferric oxide/silicon dioxide-APTMS
  • Preparation method of functionalized magnetic nanocomposite ferroferric oxide/silicon dioxide-APTMS
  • Preparation method of functionalized magnetic nanocomposite ferroferric oxide/silicon dioxide-APTMS

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Experimental program
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Effect test

Embodiment 1

[0049] Under ultrasonic (40KHz, 150W) irradiation and nitrogen protection conditions, ferrous sulfate heptahydrate (2.78g, 0.01mol) and ferric chloride hexahydrate (4.05g, 0.015mol) were added to a three-necked flask, and 50mL was added to Ionized anaerobic water was mixed evenly, and ultrasonically stirred for 20min; a constant pressure dropping funnel was added dropwise a mixed solution of 14mL ammonia water and 100mL deionized anaerobic water into the flask at a dropping speed of 2s / drop; after the addition was completed, 1mL poly Ethylene glycol 400 (PEG-400) was used as a surfactant, and then 2 mL TEOS and 1.75 mL APTMS were added to introduce SiO 2 and -NH 2 group, stirred and reacted for 4 hours under ultrasonic irradiation at 40°C; after the reaction, magnetically separated, rinsed with oxygen-free deionized water (50mL×3) to prepare nanoparticles, dried in a vacuum oven at 50°C for 12h, and the functional Fe Fe 3 o 4 @SiO 2 - APTMS magnetic nanocomposites.

[005...

Embodiment 2

[0058] Under ultrasonic (40KHz, 150W) irradiation and nitrogen protection conditions, ferrous sulfate heptahydrate (2.78g, 0.01mol) and ferric chloride hexahydrate (4.05g, 0.015mol) were added to a three-necked flask, and 50mL was added to Ionized anaerobic water was mixed evenly, and ultrasonically stirred for 20 minutes; a constant pressure dropping funnel was added dropwise a mixed solution of 14mL ammonia water and deionized anaerobic water (100mL) into the flask at a rate of 2 s / drop; after the addition was completed, add 1mL polyethylene glycol 400 (PEG-400) as a surfactant, then add 2mL TEOS and 2mL APTMS to introduce SiO 2 and -NH 2 group, stirred and reacted for 4 hours under ultrasonic irradiation at 40°C; after the reaction, magnetically separated, and rinsed with oxygen-free deionized water (50mL×3) to prepare nanoparticles. Dry in a vacuum oven at 50°C for 12 hours to obtain functionalized Fe 3 o 4 @SiO 2 - APTMS magnetic nanocomposites.

[0059] TEM test res...

Embodiment 3

[0066] Under ultrasonic (40KHz, 150W) irradiation and nitrogen protection conditions, ferrous sulfate heptahydrate (2.78g, 0.01mol) and ferric chloride hexahydrate (4.05g, 0.015mol) were added to a three-necked flask, and 50mL was added to Ionized anaerobic water was mixed evenly, and ultrasonically stirred for 20 minutes; a constant pressure dropping funnel was added dropwise a mixed solution of 14mL ammonia water and deionized anaerobic water (100mL) into the flask at a rate of 2 s / drop; after the addition was completed, add 1mL polyethylene glycol 400 (PEG-400) was used as surfactant, then 2mL TEOS and 2.25mL APTMS were added to introduce SiO 2 and -NH 2 group, stirred and reacted for 4 hours under ultrasonic irradiation at 40°C; after the reaction, magnetically separated, and rinsed with oxygen-free deionized water (50mL×3) to prepare nanoparticles. Dry in a vacuum oven at 50°C for 12 hours to obtain functionalized Fe 3 o 4 @SiO 2 - APTMS magnetic nanocomposites.

[0...

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Abstract

The invention discloses a preparation method of a functionalized magnetic nano composite material ferroferric oxide / silicon dioxide-APTMS, which comprises the following steps: firstly, preparing magnetic nano Fe3O4 particles under an ultrasonic condition; then synthesizing a functionalized magnetic nano composite material Fe3O4 (at) SiO2-APTMS which is good in dispersity, uniform in particle, larger in specific surface area and convenient to recover in one step through a coprecipitation method under ultrasonic irradiation; according to the method, equipment for synthesizing the functionalized magnetic nano composite material Fe3O4 (at) SiO2-APTMS is simple, operation is convenient, the particle size distribution of the product is uniform, the particle size range is about 10-100 nm, the specific surface area of the functionalized magnetic nano composite material Fe3O4 (at) SiO2-APTMS is 100-150 m < 2 > / g, and nanoparticles do not have an obvious oxidation phenomenon.

Description

technical field [0001] The invention relates to a functionalized magnetic nanocomposite Fe 3 o 4 @SiO 2 - A method for the preparation of APTMS. Background technique [0002] At present, the methods for removing heavy metal ions in water at home and abroad mainly include chemical precipitation, membrane separation, electrolysis, ion exchange, biological methods, and adsorption methods. Adsorption is widely used for its advantages of high efficiency, economy and simplicity. Traditional adsorbents such as activated carbon, zeolite, and molecular sieve are based on the large specific surface area and high surface energy of the adsorbent to remove heavy metals in water through physical adsorption (Sun Xiaofei, Zhang Ning, Liu Shuyan, etc. Hexavalent chromium Cr(Ⅵ ) latest research progress [J]. Applied Chemical Industry, 2020,49(04):1035-1038). However, most of these materials have disadvantages such as poor selectivity, difficult regeneration, and easy to produce secondary...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/28B82Y30/00B82Y40/00C02F1/28C02F101/20C02F101/22
CPCB01J20/06B01J20/103B01J20/22B01J20/28009B01J20/28016B01J20/28007B01J20/28061B82Y30/00B82Y40/00C02F1/288C02F2101/22C02F2101/20C02F2305/08
Inventor 赵德明包国庆张建庭吴纯鑫
Owner ZHEJIANG UNIV OF TECH
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