Gold-induced crystallization of SiO2 and TiO2 powders

Nina Perkas; Vilas G. Pol; Swati V. Pol; Aharon Gedanken

doi:10.1021/cg050018r

Gold-induced crystallization of SiO₂ and TiO₂ powders

Nina Perkas
, Vilas G. Pol
, Swati V. Pol
, Aharon Gedanken

Department of Chemistry

Bar-Ilan University

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

37 Scopus citations

Abstract

Gold nanoparticles with an average size of ∼5 nm have been deposited with the aid of power ultrasound on the surface of silica submicrospheres and on the surface of mesoporous titania. The sonochemical reduction of the gold ions is carried out by ultrasonic irradiation under argon-hydrogen atmosphere. A unique crystallization process of the silica and titania particles has been observed and characterized by X-ray powder diffraction, transmission electron microscopy, differential scanning calorimetry, and BET measurements. The crystallization process of the substrates (silica or titania) is assisted by the gold nanoparticles yielding the cristobalite phase of silica at a relatively low temperature and the anatase phase of titania at the temperature of the sonication bath (80°C).

Original language	English
Pages (from-to)	293-296
Number of pages	4
Journal	Crystal Growth and Design
Volume	6
Issue number	1
DOIs	https://doi.org/10.1021/cg050018r
State	Published - Jan 2006

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10.1021/cg050018r

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abstract = "Gold nanoparticles with an average size of ∼5 nm have been deposited with the aid of power ultrasound on the surface of silica submicrospheres and on the surface of mesoporous titania. The sonochemical reduction of the gold ions is carried out by ultrasonic irradiation under argon-hydrogen atmosphere. A unique crystallization process of the silica and titania particles has been observed and characterized by X-ray powder diffraction, transmission electron microscopy, differential scanning calorimetry, and BET measurements. The crystallization process of the substrates (silica or titania) is assisted by the gold nanoparticles yielding the cristobalite phase of silica at a relatively low temperature and the anatase phase of titania at the temperature of the sonication bath (80°C).",

author = "Nina Perkas and Pol, \{Vilas G.\} and Pol, \{Swati V.\} and Aharon Gedanken",

year = "2006",

month = jan,

doi = "10.1021/cg050018r",

language = "אנגלית",

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AU - Perkas, Nina

AU - Pol, Vilas G.

AU - Pol, Swati V.

AU - Gedanken, Aharon

PY - 2006/1

Y1 - 2006/1

N2 - Gold nanoparticles with an average size of ∼5 nm have been deposited with the aid of power ultrasound on the surface of silica submicrospheres and on the surface of mesoporous titania. The sonochemical reduction of the gold ions is carried out by ultrasonic irradiation under argon-hydrogen atmosphere. A unique crystallization process of the silica and titania particles has been observed and characterized by X-ray powder diffraction, transmission electron microscopy, differential scanning calorimetry, and BET measurements. The crystallization process of the substrates (silica or titania) is assisted by the gold nanoparticles yielding the cristobalite phase of silica at a relatively low temperature and the anatase phase of titania at the temperature of the sonication bath (80°C).

AB - Gold nanoparticles with an average size of ∼5 nm have been deposited with the aid of power ultrasound on the surface of silica submicrospheres and on the surface of mesoporous titania. The sonochemical reduction of the gold ions is carried out by ultrasonic irradiation under argon-hydrogen atmosphere. A unique crystallization process of the silica and titania particles has been observed and characterized by X-ray powder diffraction, transmission electron microscopy, differential scanning calorimetry, and BET measurements. The crystallization process of the substrates (silica or titania) is assisted by the gold nanoparticles yielding the cristobalite phase of silica at a relatively low temperature and the anatase phase of titania at the temperature of the sonication bath (80°C).

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JO - Crystal Growth and Design

JF - Crystal Growth and Design

IS - 1

ER -

Gold-induced crystallization of SiO₂ and TiO₂ powders

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