Unlock instant, AI-driven research and patent intelligence for your innovation.

A method for preparing mesoporous silica hollow sphere structure with inner wall embedded with nanomaterials

A technology of mesoporous silica and nanomaterials, applied in the field of nanomaterials, can solve the problems of increasing synthesis complexity, increasing synthesis complexity, limiting synthesis amplification, etc., achieving good catalytic stability, mild conditions, and simple synthesis methods Effect

Active Publication Date: 2020-11-24
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While this approach has good feasibility, the use and removal of sacrificial hard templates increases the complexity of the synthesis while also increasing the cost of preparation and often limits the possibility of synthetic scale-up
In addition, loading nanomaterials on the surface of sacrificial templates usually requires surface functionalization of the template or nanomaterials, which adds additional complexity to the synthesis of hollow-structured nanoreactors.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method for preparing mesoporous silica hollow sphere structure with inner wall embedded with nanomaterials
  • A method for preparing mesoporous silica hollow sphere structure with inner wall embedded with nanomaterials
  • A method for preparing mesoporous silica hollow sphere structure with inner wall embedded with nanomaterials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1) Synthesis of Pt-Fe by reference method 3 o 4 Dimer nanoparticles (C.Wang, H.Daimon, S.Sun, NanoLett.2009,9,1493.), and dispersed in 0.05g·mL -1 polydecene in n-hexane solvent. Add 4 mL of the above-mentioned cyclohexane solution containing dimer and polydecene to CTAB aqueous solution (40 mL, 2 mg·mL -1 ), ultrasonic emulsification for 5min. Cyclohexane was removed from the resulting brown dispersion by vacuum rotary evaporation. The remaining solution was diluted with water to a total volume of 40mL and then cetyltrimethylammonium bromide CTAB (8mL, 25mg·mL -1 ), sodium hydroxide (3.4mL, 7mg·mL -1), tetraethyl orthosilicate TEOS (1.2mL) and ethanol (2.4mL), heated to 40°C, after 60min, centrifuged to collect Pt-Fe 3 o 4 @mSiO 2 The product was washed once with distilled water and ethanol. Subsequent thermal calcination treatment (500 degrees, 1 hour) to obtain Pt-Fe 2 o 3 @mSiO 2 Hollow structure.

[0038] The prepared Pt-Fe 2 o 3 @mSiO 2 The hollow ...

Embodiment 2

[0043] Repeat Example 1, the difference is only that there is no Pt-Fe 3 o 4 @mSiO 2 The product is calcined. The inner walls of the resulting mesoporous silica hollow spheres are embedded with corresponding Pt-Fe 3 o 4 Dimeric nanoparticles.

Embodiment 3-5

[0045] Repeat embodiment 2, its difference only is that Pt-Fe 3 o 4 Dimer dimer nanoparticles were changed to CdSe quantum dots (synthesized by reference method, W.W.Yu, L.Qu, W.Guo, X.Peng, Chem.Mater.2003,15,2854), PtFe alloy nanorods ( Reference method synthesis, C.Wang, Y.Hou, J.Kim, S.Sun, Angew.Chem.Int.Ed.2007,46,6333.), or Pt-Fe 3 o 4 Mixture of dimer nanoparticles and PtFe alloy nanorods. The inner wall of the obtained mesoporous silica hollow sphere structure is embedded with corresponding CdSe quantum dots, PtFe alloy nanorods, dimer nanoparticles and PtFe alloy nanorod composite materials.

[0046] The prepared hollow structures were characterized by transmission electron microscopy, Figure 5a with Figure 5b Shown is the mSiO whose inner wall is embedded with CdSe quantum dots prepared in Example 3 2 TEM photo of the hollow structure; Figure 5c with Figure 5d The mSiO with inner walls embedded in PtFe nanorods prepared in Example 4 2 Transmission elect...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for preparing a mesoporous silica hollow spherical structure with nanomaterials embedded in the inner wall, which includes the following steps: adding high-boiling oil-soluble organic matter to a low-boiling point solvent dispersed with nanomaterials to form an oil phase. The aqueous solution containing the first surfactant is a water phase; the oil phase and the water phase are mixed and emulsified to form a microemulsion; the low boiling point solvent is removed by evaporation to obtain micro-nano spheres mixed with high boiling point oil-soluble organic matter and nanomaterials; utilizing the third The two surfactants are porogens and inorganic silicon species self-assemble, and the micro-nano spheres are coated with a silica shell layer with a mesoporous structure. The present invention solves the problem that complex and high-cost hard template materials are usually required to prepare hollow structures from hard templates. The preparation method has the characteristics of mild conditions, universal applicability, and the product can be prepared in large quantities. It is widely used in catalysis, high-performance batteries, drug release, and antibacterial drugs. The field has broad application prospects.

Description

technical field [0001] The invention relates to the technical field of nanometer materials. More specifically, it relates to a method for preparing a mesoporous silica hollow sphere structure with inner walls embedded with nanomaterials. Background technique [0002] In the past few decades, porous hollow nanostructures have attracted extensive attention in the fields of catalysis, energy storage, and drug / gene delivery. For example, in the field of catalysis, mesoporous hollow sphere nanoreactors with inner walls embedded with nanomaterials have become particularly important materials. The nanoreactor is a porous hollow nanostructure that contains a large number of accessible nanocatalytic materials. , has the following advantages: due to the encapsulation effect of the surrounding porous shell, it has good stability and prevents the agglomeration of nanoparticles; It is large and can be easily recovered by centrifugation or filtration, making it easier to recover than di...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/89B01J35/08B01J35/10B01J31/06B01J27/057B01J31/02B01J37/04B01J37/08A61K31/337A61K31/355A61K47/04
CPCA61K47/02A61K31/337A61K31/355B01J23/8906B01J31/02B01J31/06B01J37/009B01J37/04B01J37/08B01J35/51B01J35/647B01J35/615
Inventor 张铁锐尚露
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI