Evolution of nanoscale SnO2 grains, flakes, and plates into versatile particles and films through crystal growth in aqueous solutions

Hirotoshi Ohgi; Takahiro Maeda; Eiji Hosono; Shinobu Fujihara; Hiroaki Imai

doi:10.1021/cg049644z

Evolution of nanoscale SnO₂ grains, flakes, and plates into versatile particles and films through crystal growth in aqueous solutions

Hirotoshi Ohgi, Takahiro Maeda, Eiji Hosono, Shinobu Fujihara, Hiroaki Imai

Department of Applied Chemistry

Research output: Contribution to journal › Article

97 Citations (Scopus)

Abstract

Hierarchically structured porous particles and films consisting of nanocrystalline SnO₂ were spontaneously grown by gradual oxidation of tin(II) in a simple aqueous system at a low temperature. The nanoscale shape and macroscopically assembled architecture of SnO₂ crystallites were totally controlled by preparation conditions for crystal growth. Spherical and prickly particles exhibiting a high specific surface area in the range of 120-230 m²/g were produced by organized growth of nanoscale SnO ₂ grains and flakes, respectively. Porous SnO₂ films consisting of the nanograins and nanoflakes were directly grown on a glass substrate through heterogeneous nucleation promoted by addition of urea. Cellular aggregates and films composed of platy subunits were constructed in the solutions under an oxygen-deficient condition. Amorphous and monoxide phases contained in as-deposited particles and films were easily transformed into SnO₂ crystals without deformation of the macroscopic architecture by subsequent hydrothermal treatment at 150°C in water and calcination at 500°C in air, respectively. The easy-to-handle nanocrystalline SnO ₂ with hierarchical and porous architectures would be utilized for various practical applications.

Original language	English
Pages (from-to)	1079-1083
Number of pages	5
Journal	Crystal Growth and Design
Volume	5
Issue number	3
DOIs	https://doi.org/10.1021/cg049644z
Publication status	Published - 2005 May 1

ASJC Scopus subject areas

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

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Ohgi, H., Maeda, T., Hosono, E., Fujihara, S., & Imai, H. (2005). Evolution of nanoscale SnO₂ grains, flakes, and plates into versatile particles and films through crystal growth in aqueous solutions. Crystal Growth and Design, 5(3), 1079-1083. https://doi.org/10.1021/cg049644z

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abstract = "Hierarchically structured porous particles and films consisting of nanocrystalline SnO2 were spontaneously grown by gradual oxidation of tin(II) in a simple aqueous system at a low temperature. The nanoscale shape and macroscopically assembled architecture of SnO2 crystallites were totally controlled by preparation conditions for crystal growth. Spherical and prickly particles exhibiting a high specific surface area in the range of 120-230 m2/g were produced by organized growth of nanoscale SnO 2 grains and flakes, respectively. Porous SnO2 films consisting of the nanograins and nanoflakes were directly grown on a glass substrate through heterogeneous nucleation promoted by addition of urea. Cellular aggregates and films composed of platy subunits were constructed in the solutions under an oxygen-deficient condition. Amorphous and monoxide phases contained in as-deposited particles and films were easily transformed into SnO2 crystals without deformation of the macroscopic architecture by subsequent hydrothermal treatment at 150°C in water and calcination at 500°C in air, respectively. The easy-to-handle nanocrystalline SnO 2 with hierarchical and porous architectures would be utilized for various practical applications.",

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AU - Imai, Hiroaki

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