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Method for preparing extra-large pore diameter hollow mesoporous organic silicon nanoparticles

A nanoparticle and silicone technology, applied in the field of nanomaterials, can solve problems such as the inability to prepare ultra-large-pore silicone nanoparticles, and achieve the effects of accelerating transmission speed, increasing loading capacity, and broad application prospects

Inactive Publication Date: 2015-04-22
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to overcome the technical difficulty that the prior art cannot prepare ultra-large-pore silicone nanoparticles, and the present invention provides a method for preparing hollow mesoporous silicone nanoparticles

Method used

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  • Method for preparing extra-large pore diameter hollow mesoporous organic silicon nanoparticles
  • Method for preparing extra-large pore diameter hollow mesoporous organic silicon nanoparticles
  • Method for preparing extra-large pore diameter hollow mesoporous organic silicon nanoparticles

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preparation example Construction

[0024] The invention relates to a method for preparing hollow mesoporous organic silicon nanoparticles with double-shell layers with super large apertures. First, the organic silicon spheres with solid core / mesoporous shell with high dispersion and uniform particle size were synthesized by sol-gel method plus surfactant-guided method; then the solid core was removed by etching under alkaline conditions; finally, under hydrothermal conditions After treatment, hollow mesoporous silicone nanoparticles with ultra-large pore size and double shell were obtained. The mesoporous organosilicon nanoparticles have a unique double-shell and hollow structure, and have a large pore size, which is very beneficial to reactions involving macromolecules, such as biomacromolecules and petroleum catalytic products. The synthesis method of the invention is simple, novel and low in cost; the synthesized nano particles have extremely wide application prospects in the fields of biomacromolecule loadi...

Embodiment 1

[0047] Mix 74mL of absolute ethanol, 10mL of deionized water and 3.14mL of ammonia water, stir at 30°C for 10min; quickly add 6mL of tetraethyl orthosilicate, and magnetically stir for 1h to obtain solid SiO 2 ball; prepare a surfactant solution, that is, dissolve 1.2g of cetyltrimethylammonium bromide in 20mL of water and 10mL of absolute ethanol; the resulting solid SiO 2 Mix the spheres (the amount of SiO2 spheres is the quality obtained in the previous step) with 100mL of deionized water, 30mL of surfactant solution and 3mL of ammonia water, and quickly add 3mL of 1,4-bis(triethoxysilyl) benzene organosilicon under stirring conditions Source, after reacting for 6 hours, the organosilicon spheres with solid core mesoporous shell structure were obtained;

[0048] Disperse the obtained organic silicon spheres with solid core mesoporous shell structure (the organic silicon spheres with solid core mesoporous shell structure is the quality obtained before) in 0.6M, 30mL Na 2 CO...

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Abstract

The invention provides a method for preparing extra-large pore diameter hollow mesoporous organic silicon nanoparticles. The method comprises the following steps: (1) mixing solid SiO2 microspheres, a surfactant solution, water and ammonia water, adding an organic silicon source under stirring conditions, reacting, thereby obtaining solid core SiO2 microspheres or organic silicon microspheres of mesoporous shell structures; (2) dispersing the solid core SiO2 microspheres or organic silicon microspheres of mesoporous shell structures in an alkaline solution, etching to remove the solid cores, and separating the solid products; and (3) dispersing the solid products in water, performing hydrothermal treatment for the specified time, thereby obtaining the organic silicon microspheres of the extra-large pore diameter hollow mesoporous shell structures.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and relates to a novel preparation method of hollow mesoporous organic silicon nanoparticles with double shells with super large apertures. Background technique [0002] Mesoporous materials have been widely studied by scientists due to their high specific surface area, large pore volume, adjustable mesoscopic structure and pore size. However, it is still a great challenge to be able to synthesize hollow mesoporous materials with ultra-large pore sizes. [0003] Ordered mesoporous organosilica (Periodic mesoporous organosilia, PMOs) materials are composed of organosilicon compounds (RO) 3 -R'-Si(OR) 3 A mesoporous silicon material with an organic group R' in the skeleton obtained from a silicon source. Its ordered mesoporous structure, high introduction amount and uniform distribution of organic groups, open pore structure, and adjustable physical and chemical properties have great...

Claims

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Application Information

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IPC IPC(8): C07F7/18
Inventor 吴玫颖陈雨张玲霞施剑林
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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