Synthetic method of sliver/ferroferric oxide/silicon dioxide/titanium dioxide four-layer nuclear shell structure and application thereof

A technology of ferroferric oxide and core-shell structure, applied in the direction of metal/metal oxide/metal hydroxide catalyst, alkali metal oxide/hydroxide, chemical instruments and methods, etc., can solve the problem of small adsorption capacity, specific The surface is small, the adsorption and catalytic performance are not very good, etc., to achieve good adsorption characteristics, improve catalytic activity, and enhance the effect of adsorption and catalytic performance

Inactive Publication Date: 2014-05-21
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] Although the magnetic adsorbents in the above prior art have good catalytic and separation effects, their adsorpti

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  • Synthetic method of sliver/ferroferric oxide/silicon dioxide/titanium dioxide four-layer nuclear shell structure and application thereof
  • Synthetic method of sliver/ferroferric oxide/silicon dioxide/titanium dioxide four-layer nuclear shell structure and application thereof
  • Synthetic method of sliver/ferroferric oxide/silicon dioxide/titanium dioxide four-layer nuclear shell structure and application thereof

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[0038] The above-mentioned silver / ferroferric oxide / silicon dioxide / titanium dioxide four-layer core-shell structure application of the present invention is preferably implemented as follows:

[0039] The four-layer core-shell structure is used to remove organic pollutants and / or heavy metal pollutants.

[0040] After the four-layer core-shell structure reacts to the removal of organic pollutants and / or heavy metal pollutants, the catalyst powder used in the removal process is separated from the solution by a magnetic separation method, so that the catalyst material can be recycled.

[0041] The present invention adopts hydrothermal, sol-gel, self-organized growth and other technologies to prepare silver / ferroferric oxide / silicon dioxide / titania core-shell structure. Silver has a strong plasma enhancement effect and improves catalytic activity; magnetic nanoparticles have Super paramagnetic to facilitate the recycling of catalyst materials; the outermost titanium dioxide has a larger...

Example Embodiment

Specific embodiment:

[0042] Such as figure 1 As shown, the silver / ferric oxide core-shell structure (AgFe 3 O 4 ),Reuse Preparation of silver / ferroferric oxide / silicon dioxide three-layer structure (AgFe 3 O 4 SiO 2 ), and then use the solvothermal method to wrap a layer of burr-like titanium oxide composed of nanosheets on the surface of the core-shell structure to obtain silver / ferroferric oxide / silicon dioxide / titanium dioxide (AgFe 3 O 4 SiO 2 TiO 2 ) Four-layer core-shell structure.

[0043] In the first step, ferric nitrate, sodium acetate, silver nitrate and ethylene glycol are now mixed, and then magnetically stirred for 0.5-1h at room temperature, and the mixed solution is transferred to a Teflon-backed stainless steel reactor. Heat at 200 degrees Celsius for 8 hours. The molar ratio of iron nitrate, sodium acetate, and silver nitrate is 400:3500:59, and the content of ethylene glycol is excessive. After the reaction is completed, the mixed solution is washed with deio...

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Abstract

The invention discloses a synthetic method and application of a sliver/ferroferric oxide/silicon dioxide/titanium dioxide four-layer nuclear shell structure. The synthetic method of the sliver/ferroferric oxide/silicon dioxide/titanium dioxide four-layer nuclear shell structure comprises the steps of firstly preparing a sliver/ferroferric oxide nuclear shell structure by using a solvothermal method; then preparing a sliver/ferroferric oxide/silicon dioxide three-layer structure on the basis of the nuclear shell structure by using a stober method; coating a layer of burr shape titanium oxide composed of nanosheets on the surface of the three-layer structure obtained in the step B by using the solvothermal method to obtain a sliver/ferroferric oxide/silicon dioxide/titanium dioxide (AgFe3O4SiO2TiO2) four-layer nuclear shell structure. The four-layer nuclear shell structure is good in absorption characteristic, photocatalytic performance and superparamagnetism for removal of organic pollutants or heavy metal pollutants, so that the treatment effect of the organic pollutants and the heavy metal pollutants in sewage can be greatly improved.

Description

technical field [0001] The invention relates to a synthesis technology for removing substances of organic pollutants and heavy metal pollutants, in particular to a synthesis method and application of a silver / ferric oxide / silicon dioxide / titanium dioxide four-layer core-shell structure. Background technique [0002] With the rapid development of the economy, the amount of sewage discharge is increasing year by year, and the organic pollutants and heavy metal ions contained in it have seriously deteriorated the water resource environment. Various treatment methods have been tried, such as biodegradation, filtration and coagulation / flocculation / sedimentation, chemical redox, liquid phase exchange, membrane treatment, adsorption, and photocatalysis. However, the removal efficiency is limited, the conditions are harsh, and the cost is high, so it cannot be widely used at present. In contrast, adsorption and photocatalysis are efficient and practical methods, and have great pros...

Claims

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Application Information

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IPC IPC(8): B01J20/10B01J20/28B01J20/30C02F1/28C02F1/30B01J23/89B01J35/02
CPCY02W10/37
Inventor 苏建伟张云霞许思超王拴丁华霖李广海
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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