Synthesis of hollow silica spheres with mesostructured shell using cationic - Anionic-neutral block copolymer ternary surfactants

Yi Qi Yeh, Bi Chang Chen, Hong Ping Lin, Chih Yuan Tang

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182 Citations (Scopus)

Abstract

Hollow silica spheres with mesostructured shells (HSSMS) were prepared with a vesicle template of cetyltrimethylammonium bromide-sodium dodecyl sulfate-Pluronic P123 (C16TMAB-SDS-EO20PO 70EO20) at a SDS/C16TMAB ratio of 0.6-0.8 following a fast silicification in dilute silicate solution at pH ≈ 5.0. The mesostructure of the shell is disordered, and the mesopore size is about 5.5-7. 5 nm. Moreover, the direction and length of the nanochannels of the shell change with the SDS/C16TMAB ratios. A bi-template model, in which the C16TMA+-DS- form the stable bilayer vesicle structure and the P123 copolymers anchored on C16TMA +-DS- vesicle act as the template for the mesoporous silica, was proposed to explain the formation of the HSSMS. This bi-template model can be applied extensively to prepare the HSSMS with different diameters and pore sizes by using other CnTMAX-SDS-EOnPO mEOn ternary-surfactant mixtures.

Original languageEnglish
Pages (from-to)6-9
Number of pages4
JournalLangmuir
Volume22
Issue number1
DOIs
Publication statusPublished - 2006 Jan 3

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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