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Janus type porous silicon dioxide compound nanoparticle and preparing method thereof

A composite nanoparticle and porous silica technology, applied in the field of nanomaterials, can solve the problems of inability to prepare nanoscale, poor particle universality, harsh synthesis conditions, etc., and achieve the effects of easy size regulation, low cost, and mild synthesis conditions.

Pending Publication Date: 2019-08-09
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Based on this, the present invention provides a preparation method of Janus-type porous silica composite nanoparticles, which uses cationic surfactant as a unidirectional growth conductive agent, mixes with nanospheres, and reacts with silica precursor under alkaline conditions. In this way, Janus-type porous silica composite nanoparticles with controllable size are obtained, which solves the problems of inability to prepare nano-sized misaligned particles, harsh synthesis conditions, low yield and poor universality of the prepared particles in the prior art. question

Method used

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  • Janus type porous silicon dioxide compound nanoparticle and preparing method thereof
  • Janus type porous silicon dioxide compound nanoparticle and preparing method thereof
  • Janus type porous silicon dioxide compound nanoparticle and preparing method thereof

Examples

Experimental program
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Embodiment 1

[0043] Weigh 0.5g of cetyltrimethylammonium bromide and dissolve it in 200mL of deionized water, add 1g of silica nanospheres, and stir mechanically for 3 hours to form a uniform dispersion A;

[0044] Dispersion A was adjusted to pH 8 with ammonia water and mechanically stirred for 2 hours to obtain dispersion B;

[0045] Add 2 g of tetraethyl orthosilicate to dispersion B, heat up to 40°C and stir for 12 hours to obtain a Janus-type porous silica composite nanoparticle dispersion;

[0046] After the obtained Janus type porous silica composite nanoparticle dispersion was purified and spray-dried, Janus type porous silica composite nanoparticles were obtained. In this embodiment, the final product was 1.348g, the theoretical output value was 1.56g, and the yield was 86.4g. %, illustrates that the production rate of the preparation method of the present invention is considerable.

[0047] The Janus type porous silicon dioxide composite nanoparticles prepared in Example 1 were ...

Embodiment 2

[0051] Weigh 1.0 g of cetyltrimethylammonium chloride and dissolve it in 200 mL of deionized water, add 1 g of polyacrylonitrile nanospheres, and stir mechanically for 3 hours to form a uniform dispersion A;

[0052] Adjust the pH of dispersion A to 9 with triethylamine, and mechanically stir for 2 hours to obtain dispersion B;

[0053] Add 4g of methyl orthosilicate to dispersion B, heat up to 80°C and stir for 12 hours to obtain a Janus type porous silica composite nanoparticle dispersion;

[0054] Purify and spray-dry the obtained Janus type porous silica composite nanoparticle dispersion to obtain Janus type polyacrylonitrile-porous silica composite nanoparticle.

[0055] The Janus type polyacrylonitrile-porous silica composite nanoparticles in embodiment 2 are characterized by scanning electron microscopy and infrared spectroscopy, the results are shown in Figure 5 and Image 6 ,in, Figure 5 It is the SEM picture of the product made in Example 2. It can be seen from ...

Embodiment 3

[0058] Weigh 1.5g of dodecyldimethylbenzyl ammonium chloride and dissolve it in 200mL of deionized water, add 1.2g of alumina nanospheres, and stir mechanically for 3 hours to form a uniform dispersion A;

[0059] Adjust dispersion A to pH = 9 with ammonia water, and mechanically stir for 2 hours to obtain dispersion B;

[0060] Add 1 g of sodium silicate to dispersion B, heat up to 80° C. and stir for 12 hours to obtain a Janus type porous silica composite nanoparticle dispersion;

[0061] Purify and freeze-dry the obtained Janus-type porous silicon dioxide composite nanoparticle dispersion to obtain Janus-type alumina-porous silicon dioxide composite nanoparticle.

[0062] The Janus type alumina-porous silica composite nanoparticle infrared spectrum in embodiment 3 is characterized, and the results are shown in Figure 7 ; Simultaneously the alumina nanosphere in embodiment 3 is compared with Janus type alumina-porous silica composite nanoparticle particle size, the results...

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Abstract

The invention discloses a Janus type porous silicon dioxide compound nanoparticle and a preparing method thereof. The method includes the steps of mixing a cationic surfactant, nanospheres and a solvent to form a dispersoid A, adjusting the dispersoid A to be alkaline to obtain a dispersoid B, and conducting the temperature raising reaction after adding a silicon dioxide precursor to the dispersoid B to prepare the Janus type porous silicon dioxide compound nanoparticle. A one-way growth guiding agent is adopted, the Janus type porous silicon dioxide compound nanoparticle is directly induced to be generated in the water dispersoid, the reaction is conducted at a room temperature, the reaction conditions are mind, the size of the nanoparticle is easy to adjust and control, universality is high, and the nanoparticle can be directly applied to other fields.

Description

technical field [0001] The invention belongs to the field of nanometer materials, and in particular relates to a Janus type porous silicon dioxide composite nanoparticle and a preparation method thereof. Background technique [0002] With the continuous development of nanomaterials, the research on nanoparticles with complex functions is deepening and the demand is increasing. As an important class of asymmetric nanoparticles, Janus (Janus originated from the "two-faced god" in ancient Rome) type nanoparticles can be used to describe two completely different compositions and physical (or chemical) particles in the same mesoscopic system. properties), usually has a clear partition structure, and has dual properties such as hydrophilic / hydrophobic, polar / nonpolar, so it plays an important role in the complex functionalization of nanoparticles, and its synthesis and research are also widely focus on. [0003] Janus-type porous silica composite nanoparticles have the advantage...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/12B82Y40/00C01G49/08C01F7/02C01G9/02C08J7/00C08J7/06C08L33/20
CPCC01B33/12B82Y40/00C01G49/08C01F7/021C01G9/02C08J7/00C08J7/06C08J2333/20C01P2004/04C01P2004/03C01P2002/82C01P2004/51
Inventor 张建安袁玉昆李小飞吴明元吴庆云杨建军刘久逸
Owner ANHUI UNIVERSITY
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