Surfactant-free synthesis of hollow mesoporous organosilica nanoparticles with controllable particle sizes and diversified organic moieties

Natsume Koike, Watcharop Chaikittisilp, Atsushi Shimojima, Tatsuya Okubo

研究成果: Article

8 引用 (Scopus)

抄録

Fine control over particle sizes and organic moieties of hollow organosilica nanoparticles is of importance towards practical applications of functional colloids in, for example, catalysis, drug delivery, and coating. Here, we report the versatile synthesis of hollow mesoporous organosilica nanoparticles with controllable particle sizes and diversified organic moieties using silica nanoparticles (SNs) as sacrificial, hard templates, which are removed by dissolution under alkali conditions. The resulting organosilica nanoparticles possessed size-tunable hollow interiors that can be accessed through mesoporous shells. The diameters of such hollow organosilica nanoparticles were easily controlled by altering the diameters of the SN templates, ranging from 12 to 170 nm. Organic moieties in the mesoporous shells can be diversified by changing the organosilica sources, (EtO)3Si-R-Si(OEt)3, where R = methylene, ethylene, and phenylene groups. In addition, it was revealed that there are minimum surface areas of the SN templates in the dispersions required to achieve the monodisperse silica/organosilica core/shell nanoparticles without homogeneous nucleation of organosilica nanoparticles. The nitrogen and argon adsorption-desorption isotherms of the resulting hollow organosilica nanoparticles showed type H5 hysteresis loops, which are derived from the mixed pore system of cage-like pores (hollow spaces) and open pores (interparticular voids between hollow organosilica nanoparticles). Hysteresis scanning measurements and NLDFT pore size distributions revealed the pore structures of the resulting hollow organosilica nanoparticles.

元の言語English
ページ(範囲)90435-90445
ページ数11
ジャーナルRSC Advances
6
発行部数93
DOI
出版物ステータスPublished - 2016
外部発表Yes

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Surface-Active Agents
Surface active agents
Particle size
Nanoparticles
Silicon Dioxide
Silica
Argon
Colloids
Alkalies
Hysteresis loops
Pore structure
Drug delivery
Dispersions
Catalysis
Pore size
Isotherms
Hysteresis
Desorption
Ethylene
Dissolution

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

これを引用

Surfactant-free synthesis of hollow mesoporous organosilica nanoparticles with controllable particle sizes and diversified organic moieties. / Koike, Natsume; Chaikittisilp, Watcharop; Shimojima, Atsushi; Okubo, Tatsuya.

:: RSC Advances, 巻 6, 番号 93, 2016, p. 90435-90445.

研究成果: Article

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