Nano compound with multilayer structure, and applications thereof

A nanocomposite, multi-layer structure technology, applied in the direction of organic compound/hydride/coordination complex catalyst, water pollutant, drug combination, etc., can solve the problem of visible light responsiveness and magnetic targeting without further introduction of modified components , enhance the visible light responsiveness and biological specificity, and do not further introduce other modification components, so as to reduce the TiO2 band gap, widen the absorption boundary, and be easy to generalize.

Inactive Publication Date: 2017-07-14
TAISHAN MEDICAL UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0007] After searching the literature of the prior art, it was found that the literature "preparation of magnetic photocatalyst Fe by vapor phase hydrolysis 3 o 4 /SiO 2 /TiO 2 and its photocatalytic performance" reported that the vapor phase hydrolysis method was used to obtain Fe 3 o 4 The nano-magnetic particles are the magnetic core, and the surface is covered with a layer of SiO 2 to prevent photocorrosion, and then deposit nano-titanium oxide on Fe 3 o 4 /SiO 2 Particle surface, thus preparing the core-shell structure of Fe 3 o 4 /SiO 2 /TiO 2 Composite material for photocatalytic degradation of organic pollutants; although the reported composite material introduces magnetism, it is different from the preparation method and

Method used

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Examples

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Example Embodiment

[0029] Example 1: Preparation of multilayer nanocomposite

[0030] Step (1): Prepare 0.24mol·L -1 Ferric chloride and 0.12mol·L -1 Ferrous chloride mixed solution, add a few drops of dilute hydrochloric acid, bubbling with nitrogen for 40 minutes, add ammonia (6-7wt%) to pH=9 under stirring conditions, react for 4h, magnetically separate, and wash with distilled water and ethanol for 3 times , Heat treatment at 30℃ for 4h. Add it to the citric acid-sodium citrate solution (the concentration of citrate is 0.2mol·L -1 ), ultrasonically dispersed uniformly, centrifuged and washed with ethanol 3 times, and dried in vacuum. The resulting product is counted as S 1 .

[0031] Step (2): Weigh 40 mg of the product obtained in step (1), add distilled water, absolute ethanol, and concentrated ammonia (25-28wt%) at a volume ratio of 10:30:1 under continuous stirring, and then add dropwise 0.3mL ethyl orthosilicate reacted for 4h, magnetically settled, washed with distilled water and ethanol ...

Example Embodiment

[0036] Example 2: Preparation of multilayer nanocomposite

[0037] Step (1): Prepare 0.24mol·L -1 Ferric chloride and 0.12mol·L -1 Ferrous chloride mixed solution, add a few drops of dilute hydrochloric acid, bubbling with nitrogen for 40 minutes, add ammonia (6-7wt%) to pH=9 under stirring conditions, react for 4h, magnetically separate, and wash with distilled water and ethanol for 3 times , Heat treatment at 30℃ for 4h. Add it to the citric acid-sodium citrate solution (the concentration of citrate is 0.2mol·L -1 ), ultrasonically dispersed uniformly, centrifuged and washed with ethanol 3 times, and dried in vacuum.

[0038] Step (2): Weigh 40 mg of the product obtained in step (1), add distilled water, absolute ethanol, and concentrated ammonia (25-28wt%) at a volume ratio of 10:30:1 under continuous stirring, and then add dropwise 0.3mL ethyl orthosilicate reacted for 4h, magnetically settled, washed with distilled water and ethanol successively, and heat treated at 30℃ for 4...

Example Embodiment

[0043] Example 3: Preparation of multilayer nanocomposite

[0044] Step (1): Prepare 0.24mol·L -1 Ferric chloride and 0.12mol·L -1 Ferrous chloride mixed solution, add a few drops of dilute hydrochloric acid, bubbling with nitrogen for 40 minutes, add ammonia (6-7wt%) to pH=9 under stirring conditions, react for 4h, magnetically separate, and wash with distilled water and ethanol for 3 times , Heat treatment at 30℃ for 4h. Add it to the citric acid-sodium citrate solution (the concentration of citrate is 0.2mol·L -1 ), ultrasonically dispersed uniformly, centrifuged and washed with ethanol 3 times, and dried in vacuum.

[0045] Step (2): Weigh 40 mg of the product obtained in step (1), add distilled water, absolute ethanol, and concentrated ammonia (25-28wt%) at a volume ratio of 10:30:1 under continuous stirring, and then add dropwise 0.3mL ethyl orthosilicate reacted for 4h, magnetically settled, washed with distilled water and ethanol successively, and heat treated at 30℃ for 4...

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Abstract

The invention provides a nano compound with a multilayer structure, and applications thereof. The multilayer structure is composed of an inner core layer, an insolating layer, a main functional layer, and a double modified layer from inside to outside; the general structure formula of the nano compound is FeO-SiO<2>-TiO<2>-(X+FA); the inner core layer FeO is magnetic Fe3O4 or magnetic Fe2O3 or a mixture of magnetic Fe3O4 and Fe2O3; the isolating layeris SiO2; the main functional layer is TiO2; X in the double modified layer (X+FA) is one element selected from Zn, La, and Ce; FA is used for representing folic acid. The nano compound possesses magnetism, visible light responsiveness, bio specificity, and enhanced photocatalytic activity, and can be used in the photocatalysis field; steps are simple; operation is simple; and practicality is high.

Description

technical field [0001] The invention belongs to the technical fields of magnetic materials, nanometer materials and photocatalysis, and in particular relates to a multilayer structure nanocomposite and its application. Background technique [0002] Since the 1980s when Gleiter and others successfully prepared Pd, Cu, Fe and other nanoparticles by the inert gas condensation method for the first time, nanomaterials as a new material have gradually become the focus of research and development around the world. Because nanomaterials are obviously different from bulk materials and single molecules, they have unique surface effects, small size effects, quantum size effects and tunnel effects, and present many unique physical and chemical properties. Storage, papermaking, ceramics, cosmetics, catalysis, medicine, environmental protection and other fields show broad application prospects. [0003] Among them, the nanostructured semiconductor material TiO 2 It is regarded as one of...

Claims

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Application Information

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IPC IPC(8): B01J31/38A61K41/00A61P35/00C02F1/30C02F101/38
CPCA61K41/0057B01J31/38B01J35/004B01J35/008B01J35/0086C02F1/30C02F2101/308C02F2101/38
Inventor 毕玉水
Owner TAISHAN MEDICAL UNIV
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