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

Naoki Shimura; Makoto Ogawa

doi:10.1016/j.jcis.2007.02.091

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

Naoki Shimura, Makoto Ogawa

Research output: Contribution to journal › Article › peer-review

13 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 language	English
Pages (from-to)	311-316
Number of pages	6
Journal	Journal of Colloid and Interface Science
Volume	312
Issue number	2
DOIs	https://doi.org/10.1016/j.jcis.2007.02.091
Publication status	Published - 2007 Aug 15

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

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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.",

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AU - Ogawa, Makoto

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AB - 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.

KW - Core shell particles

KW - Hydrotalcite

KW - Nanoporous silicas

KW - Supramolecular templating approach

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

Abstract

Keywords

ASJC Scopus subject areas

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