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A kind of silica-filled nano-cluster composite material and its preparation method and application

A nano-cluster and composite material technology is applied in the field of silica-filled nano-cluster composite materials and the preparation thereof, and achieves the effects of good photocatalytic water splitting for hydrogen production, controllable composition and mild conditions.

Active Publication Date: 2017-01-11
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current methods mostly focus on changing the thickness of the outer silica coating layer, and the adjustment between the coated nanoparticles, especially the short distance between nanoparticles such as (0-5 nanometers, etc.) is still scarce. There are reports

Method used

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  • A kind of silica-filled nano-cluster composite material and its preparation method and application
  • A kind of silica-filled nano-cluster composite material and its preparation method and application
  • A kind of silica-filled nano-cluster composite material and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0037] A method for preparing a silica-filled nanocluster composite material, comprising the following steps:

[0038] At room temperature, 1ml cyclohexane dispersed with tetraethyl orthosilicate (TEOS), Au nanocrystals and CdSe nanocrystals was mixed with 10ml sodium dodecyl sulfate (SDS) aqueous solution to form a microemulsion under ultrasonic conditions, and the ultrasonic power was 20%, ultrasonic 5min. Among them, the particle size of Au nanocrystals is 9nm, the concentration in cyclohexane dispersion is 1mg / ml, the particle size of CdSe nanocrystals is 3nm, and the concentration in cyclohexane dispersion is 5mg / ml, TEOS is added The amount is 100ul, and the concentration of sodium lauryl sulfate is 3mg / ml.

[0039] The microemulsion was heated at 343K for 4h, centrifuged and dried to obtain silica-filled Au / CdSe@SiO 2 nanocluster composites.

[0040] figure 1 For the obtained silica-filled Au / CdSe@SiO 2 Electron micrographs of nanocluster composites, it can be seen...

Embodiment 2

[0042] Repeat embodiment 1, its difference only is that TiO 2 Nanocrystals added to cyclohexane, TiO 2 The particle size of the nanocrystal is 10nm, and the concentration in the cyclohexane dispersion is 1mg / ml, and the silica-filled Au / CdSe / TiO can be obtained 2 @SiO 2 nanocluster composites.

[0043] The prepared silica-filled Au / CdSe / TiO 2 @SiO 2 Nanocluster composites were characterized by transmission electron microscopy, figure 2 For the obtained silica-filled Au / CdSe / TiO 2 @SiO 2 Electron micrographs of nanocluster composites, it can be seen that Au / CdSe / TiO 2 @SiO 2 Nanocluster composites made of SiO 2 , Au nanocrystals, CdSe nanocrystals and TiO 2 Nanocrystalline composition, SiO 2 Filled throughout Au / CdSe / TiO 2 clusters, and the Au / CdSe / TiO 2 The clusters are completely covered. Au / CdSe / TiO 2 @SiO 2 The size of the nanocluster composite is about 100nm.

Embodiment 3

[0045] Repeat Example 1, the only difference is that the amount of TEOS added is 50ul, Au / CdSe@SiO can still be obtained 2 nanocluster composites.

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Abstract

The invention discloses a silicon dioxide-filled nano-cluster composite material. The silicon dioxide-filled nano-cluster composite material comprises silicon dioxide and at least two types of inorganic nano-crystals, wherein one type is the inorganic nano-crystals with a surface plasma resonance effect, and the other type is the inorganic nano-crystals in overlapping absorption with the first type of the inorganic nano-crystals; the at least two types of the inorganic nano-crystals are assembled to obtain nano-clusters; the silicon dioxide is distributed in the whole nano-clusters to form the nano-cluster composite material; the particle size of the inorganic nano-crystals is 1-100nm; and the diameter of the nano-cluster composite material is 50-1000nm. The nano-cluster composite material has the advantages of simplicity, convenience, easiness in obtainment and adjustable size and composition, and further has important significance in actual application. The invention further discloses a method for preparing the silicon dioxide-filled nano-cluster composite material and application.

Description

technical field [0001] The invention relates to the field of nanometer material and its preparation. More specifically, it relates to a silica-filled nanocluster composite material and its preparation method and application. Background technique [0002] The rapid development of nanoscience and technology has prepared a variety of novel nanomaterials. These nanomaterials overcome some defects of bulk materials, and exhibit some new physical and chemical properties, showing great application prospects in many fields. However, a single nanomaterial also has some disadvantages. For example, most nanomaterials, including metal nanomaterials, magnetic nanomaterials, and quantum dots, are difficult to disperse uniformly in aqueous solution, which greatly limits their applications. In addition, many quantum dots and metal oxide nanomaterials are prone to corrosion reactions under acidic conditions and lose their stability. Therefore, it is usually necessary to coat the surface o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/02C09K11/88B01J27/057B82Y30/00B82Y40/00C01B3/04
CPCY02E60/36
Inventor 张铁锐曹寅虎吴骊珠佟振合
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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