Preparation of hexagonal platy particles of nanoporous silica using hydrotalcite as morphology template

Naoki Shimura, Makoto Ogawa

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Hexagonal platy composite particles with a hydrotalcite core and a nanoporous silica shell with a thickness of ca. 100 nm were synthesized by the reaction of a Mg-Al hydrotalcite with a homogeneous aqueous solution containing tetraethoxysilane, hexadecyltrimethylammonium chloride, ammonia and methanol at 3 °C. The calcination of the products at 500 °C in air led to the composite particle with a Mg/Al mixed oxide core and a nanoporous silica shell. Hexagonal platy particles of nanoporous silica with a pore diameter of 2.3 nm and BET surface area of 700 m2 (g of silica)-1 were obtained by removing the Mg/Al mixed oxide core.

Original languageEnglish
Pages (from-to)311-316
Number of pages6
JournalJournal of Colloid and Interface Science
Volume312
Issue number2
DOIs
Publication statusPublished - 2007 Aug 15

Fingerprint

hydrotalcite
Silicon Dioxide
templates
Silica
silicon dioxide
preparation
mixed oxides
Oxides
composite materials
Composite materials
Ammonia
Calcination
roasting
Methanol
Chlorides
ammonia
methyl alcohol
chlorides
aqueous solutions
porosity

Keywords

  • Core shell particles
  • Hydrotalcite
  • Nanoporous silicas
  • Supramolecular templating approach

ASJC Scopus subject areas

  • Colloid and Surface Chemistry
  • Physical and Theoretical Chemistry
  • Surfaces and Interfaces

Cite this

Preparation of hexagonal platy particles of nanoporous silica using hydrotalcite as morphology template. / Shimura, Naoki; Ogawa, Makoto.

In: Journal of Colloid and Interface Science, Vol. 312, No. 2, 15.08.2007, p. 311-316.

Research output: Contribution to journalArticle

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