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Mesoporous organosilicon hollow nanoparticles with asymmetric morphology and its synthesis method

A mesoporous organosilicon and hollow nanotechnology, applied in the field of mesoporous nanomaterials, can solve the problems of limited application, composition and particle size difficult to control, etc., achieve fast adsorption rate, high adsorption capacity, and enhanced ultrasonic signal effect

Active Publication Date: 2018-10-02
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problem that the application of HPMOs is greatly limited due to the difficulty in controlling the shape, nanostructure, composition and particle size of the above-mentioned prior art, the present invention provides a mesoporous organic silicon hollow nanoparticle with asymmetric shape and Its synthetic method

Method used

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  • Mesoporous organosilicon hollow nanoparticles with asymmetric morphology and its synthesis method
  • Mesoporous organosilicon hollow nanoparticles with asymmetric morphology and its synthesis method
  • Mesoporous organosilicon hollow nanoparticles with asymmetric morphology and its synthesis method

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Embodiment 1

[0036] 1) use Core SiO 2 nanoparticles;

[0037] 2) Using double silicon-based organoalkoxysilane as silicon source and cationic surfactant as pore-forming agent, in the SiO 2 Nanoparticles coated with a layer of SiO hybridized with organic functional groups 2 Layer, the specific process is:

[0038] The 100mg core SiO 2 Nanoparticles dispersed into 2.5mL ethanol to form a suspension, SiO 2 The mass ratio of / ethanol is 1 / 19.7, and then the suspension is dispersed into a mixed solution of 62.5mL distilled water, 0.75g cetyltrimethylammonium chloride and 6mL ammonia water, so that SiO 2 The mass ratio of / distilled water / hexadecyltrimethylammonium chloride / ammonia water is 2 / 1250 / 15 / 109.2, under stirring, add 0.25mL L 1,4-bis(triethoxysilane) dropwise to the solution base) benzene, reacted for 20 hours, centrifuged, and washed with ethanol and water three times respectively to obtain phenyl hybridized mesoporous SiO 2 layer coated with SiO 2 Nanoparticle core-shell mat...

Embodiment 2

[0042] 1) use Core SiO 2 nanoparticles;

[0043] 2) Using double silicon-based organoalkoxysilane as silicon source and cationic surfactant as pore-forming agent, in the SiO 2 Nanoparticles coated with a layer of SiO hybridized with organic functional groups 2 Layer, the specific process is:

[0044] The 100mg core SiO 2 Nanoparticles dispersed into 2.5mL ethanol to form a suspension, SiO 2 The mass ratio of / ethanol is=1 / 19.7, and then the suspension is dispersed into a mixed solution of 62.5mL distilled water, 0.75g cetyltrimethylammonium chloride and 6mL ammonia water, so that SiO 2 The mass ratio of / distilled water / hexadecyltrimethylammonium chloride / ammonia water is 2 / 1250 / 15 / 109.2, under stirring, add 0.25mL bis(triethoxysilane)ethylene dropwise to the solution, and react for 20h , centrifuged, and washed three times with ethanol and water respectively to obtain vinyl hybrid mesoporous SiO 2 layer coated with SiO 2 Nanoparticle core-shell material SiO 2 &PMOs;...

Embodiment 3

[0048] 1) use Core SiO 2 nanoparticles;

[0049] 2) Using double silicon-based organoalkoxysilane as silicon source and cationic surfactant as pore-forming agent, in the SiO 2 Nanoparticles coated with a layer of SiO hybridized with organic functional groups 2 Layer, the specific process is:

[0050] The 100mg core SiO 2 Nanoparticles dispersed into 2.5mL ethanol to form a suspension, SiO 2 The mass ratio of / ethanol is=1 / 19.7, and then the suspension is dispersed into a mixed solution of 62.5mL distilled water, 0.75g cetyltrimethylammonium chloride and 6mL ammonia water, so that SiO 2 The mass ratio of / distilled water / hexadecyltrimethylammonium chloride / ammonia water is 2 / 1250 / 15 / 109.2. Under stirring, add 0.25mL 1,2-bis(triethoxysilyl ) ethane, reacted for 20h, centrifuged, and then washed 3 times with ethanol and water, respectively, to obtain ethyl-based hybrid mesoporous SiO 2 layer coated with SiO 2 Nanoparticle core-shell material SiO 2 &PMOs;

[0051] 3) Us...

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Abstract

The invention discloses a synthetic method of mesoporous organosilica hollow nanoparticles with asymmetric morphology. The synthetic method comprises the following steps: SiO2-core nanoparticles are prepared with the St ber process; double-Si-based organoalkoxysilane is taken as a silicon source, a cationic surfactant is taken as a pore forming material, and the SiO2 nanoparticles are coated with an organic functional group hybridized SiO2 layer; a SiO2 core of a core-shell material SiO2-PMOs is removed through etching with Na2CO3, HF or ammonia water, and organic functional group hybridized SiO2-based hollow nanoparticles are obtained; a hydrochloric acid-ethanol solution or a NaCl-methanol solution is used for extracting the pore forming material in the organic functional group hybridized SiO2-based hollow nanoparticles, and the mesoporous organosilica hollow nanoparticles with the asymmetric morphology are obtained. The problem that the application of the mesoporous organosilica hollow nanoparticles is limited greatly due to the fact that the morphology, the nanostructure, the composition and the particle size of the mesoporous organosilica hollow nanoparticles are difficult to regulate and control in the prior art is solved.

Description

technical field [0001] The invention relates to a mesoporous nanometer material, in particular to a mesoporous organosilicon hollow nanoparticle with asymmetric shape (JHPMOs for short) and a synthesis method thereof. Background technique [0002] Mesoporous silica nanoparticles have been widely studied in many fields because of their high specific surface area, large pore volume, adjustable pore size and particle size in a large range, and easy modification of inner / outer surfaces, such as Used as a drug carrier, catalyst, adsorbent, etc. (see Journal of the American Chemical Society, 2012, 134, 5722). Among mesoporous silica nanoparticles, mesoporous silica hollow nanoparticles have attracted more attention due to the combination of a hollow cavity that helps to increase the adsorption / loading capacity and a thin mesoporous shell that facilitates the diffusion of guest molecules. . More importantly, mesoporous silica hollow nanoparticles have shown very good performance ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J13/02
CPCB01J13/02B01J13/025
Inventor 陶桂菊张龙白正元
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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